1. SYMPTOM CHART
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Symptom |
Repair order |
Reference |
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None of the functions of the keyless entry system operate. |
1. Check the keyless transmitter battery. |
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2. Remove and visually check fuse No. 3 (in the fuse & relay box) and No. 7 (in the fuse & relay box). |
Replace any blown fuse with a new part.
If the fuses have no faults, check the power supply and ground circuit. |
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3. Check the keyless entry control module. |
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4. Check the power supply, ground circuit, and registration connector for the body integrated unit. |
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5. Check the key warning switch. |
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6. Check the door switch. |
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7. Check the body integrated unit. |
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The keyless transmitter cannot be registered. |
1. Check the keyless transmitter battery. |
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2. Check the registration connection circuit. |
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3. Check the key warning switch. |
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4. Check the door lock switch signal. |
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5. Check the body integrated unit. |
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Door lock or unlock does not operate.
NOTE:
If the door lock control system does not operate when using the door lock switch, check the door lock control system.
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1. Check the keyless transmitter battery. |
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2. Check the keyless entry control module. |
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3. Check the key warning switch. |
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4. Check the door switch. |
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5. Check the body integrated unit. |
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The hazard light does not operate. |
1. Check the hazard light operation. |
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2. Check the body integrated unit. |
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Room light does not operate. |
1. Check the room light operation. |
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2. Check the body integrated unit. |
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Ignition switch illumination does not operate. |
1. Check the ignition switch illumination. |
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2. Check the body integrated unit. |
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2. CHECK KEYLESS TRANSMITTER BATTERY AND FUNCTION
1.CHECK KEYLESS TRANSMITTER BATTERY.
1) Remove the battery from the keyless transmitter.
2) Check the battery voltage.
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Is the voltage 2.5 V or more?
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Replace the keyless transmitter battery.
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2.CHECK KEYLESS TRANSMITTER.
Register the keyless transmitter which operates normally on other vehicles to the inspection target vehicle.
1) Close all the doors and rear gate of inspection target vehicle.
2) Using the keyless transmitter, lock and unlock the doors and rear gate of vehicle.
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Can the check vehicle be locked and unlocked properly?
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Due to vehicle malfunction, continue the keyless entry system diagnosis.
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3.CHECK KEYLESS TRANSMITTER.
Register the keyless transmitter of the inspected vehicle to another vehicle whose keyless system operates normally.
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Is the keyless transmitter registered correctly?
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Replace the keyless transmitter.
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4.CHECK KEYLESS TRANSMITTER.
Check the registered keyless transmitter.
1) Close all the doors and rear gate of the vehicle which operates keyless system normally.
2) Using the keyless transmitter, lock and unlock the doors and rear gate of vehicle.
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Can the vehicle be locked and unlocked properly?
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Keyless transmitter is OK.
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Replace the keyless transmitter.
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CAUTION:
Be sure to reset the keyless transmitter of other vehicle which is registered to the inspection target vehicle, and the vehicle to which the keyless transmitter is registered for inspection, to the condition before performing the inspection. (Register the keyless transmitter again.)
3. CHECK KEYLESS ENTRY CONTROL MODULE
1.CHECK DIAGNOSTIC TROUBLE CODE (DTC).
1) Prepare the Subaru Select Monitor kit.
2) Turn the ignition switch to ON (engine OFF) and run the “PC application for Subaru Select Monitor”.
3) On the «System Selection Menu», select {Integ. Unit mode}.
4) Select the {Diagnostic Trouble Code}.
5) Check that the DTC is displayed.
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Is DTC B1500 “Keyless UART com. Malfunction” displayed?
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Keyless entry control module is normal.
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2.CHECK POWER SUPPLY.
1) Disconnect the keyless entry control module harness connector.
2) Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(R80) No. 4 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Check the harness for open or short circuits between the keyless entry control module and the fuse.
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3.CHECK GROUND CIRCUIT.
Measure the resistance between harness connector terminal and chassis ground.
Connector & terminal
(R80) No. 7 — Chassis ground:
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Is the resistance less than 10 Ω?
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4.CHECK KEYLESS ENTRY CONTROL MODULE CIRCUIT.
1) Disconnect the harness connector of body integrated unit.
2) Measure the resistance between harness connector terminals.
Connector & terminal
(i84) No. 24 — (R80) No. 3:
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Is the resistance less than 10 Ω?
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Replace the keyless entry control module.
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4. CHECK POWER SUPPLY AND GROUND CIRCUIT OF BODY INTEGRATED UNIT AND REGISTRATION CONNECTOR CIRCUIT
1.CHECK REGISTRATION CONNECTOR INPUT VOLTAGE.
1) Measure the voltage between the body integrated unit harness connector and chassis ground.
Connector & terminal
(B281) No. 13 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Disconnect the registration connector if it is connected. Or, check the harness between the body integrated unit and ground for short circuits. If there are no problems,
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2.CHECK POWER SUPPLY OF BODY INTEGRATED UNIT.
1) Disconnect the harness connector of body integrated unit.
2) Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(B280) No. 6 (+) — Chassis ground (−):
(B281) No. 2 (+) — Chassis ground (−):
(i84) No. 34 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Check the harness for open or short circuits between the body integrated unit and fuse.
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3.CHECK BODY INTEGRATED UNIT GROUND CIRCUIT.
1) Disconnect the harness connector of body integrated unit.
2) Measure the resistance between harness connector terminal and chassis ground.
Connector & terminal
(i84) No. 28 — Chassis ground:
(B280) No. 17 — Chassis ground:
(B281) No. 20 — Chassis ground:
(B279) No. 27 — Chassis ground:
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Is the resistance less than 10 Ω?
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Check the body integrated unit.
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5. CHECK REGISTRATION CONNECTOR
1.CHECK REGISTRATION CONNECTOR INPUT VOLTAGE.
1) Disconnect the registration connector.
2) Measure the voltage between the body integrated unit harness connector and chassis ground.
Connector & terminal
(B281) No. 13 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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2.CHECK REGISTRATION CONNECTOR INPUT VOLTAGE.
1) Connect the registration connector.
2) Measure the voltage between the body integrated unit harness connector and chassis ground.
Connector & terminal
(B281) No. 13 (+) — Chassis ground (−):
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Registration connector circuit is OK.
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6. CHECK DOOR SWITCH
1.CHECK DOOR SWITCH.
Check the input signal from door switch to body integrated unit using the Subaru Select Monitor.
1) Prepare the Subaru Select Monitor kit.
2) Turn the ignition switch to ON (engine OFF) and run the “PC application for Subaru Select Monitor”.
3) On the «System Selection Menu», select {Integ. Unit mode}.
4) Select the {Current Data Display & Save}.
5) Check the input signal to body integrated unit by operating the door switch.
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When the door switch is turned to ON/OFF, is a proper input signal displayed?
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2.CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between the body integrated unit harness connector terminal and chassis ground.
Connector & terminal
LHD model
Front door RH:
(i84) No. 32 (+) — Chassis ground (−):
Front door LH:
(i84) No. 19 (+) — Chassis ground (−):
Rear door RH:
(i84) No. 20 (+) — Chassis ground (−):
Rear door LH:
(i84) No. 6 (+) — Chassis ground (−):
Rear gate:
(i84) No. 33 (+) — Chassis ground (−):
RHD model
Front door RH:
(i84) No. 19 (+) — Chassis ground (−):
Front door LH:
(i84) No. 32 (+) — Chassis ground (−):
Rear door RH:
(i84) No. 6 (+) — Chassis ground (−):
Rear door LH:
(i84) No. 20 (+) — Chassis ground (−):
Rear gate:
(i84) No. 33 (+) — Chassis ground (−):
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Is the voltage 0 V when each door or rear gate is opened?
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3.CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between the body integrated unit harness connector terminal and chassis ground.
Connector & terminal
LHD model
Front door RH:
(i84) No. 32 (+) — Chassis ground (−):
Front door LH:
(i84) No. 19 (+) — Chassis ground (−):
Rear door RH:
(i84) No. 20 (+) — Chassis ground (−):
Rear door LH:
(i84) No. 6 (+) — Chassis ground (−):
Rear gate:
(i84) No. 33 (+) — Chassis ground (−):
RHD model
Front door RH:
(i84) No. 19 (+) — Chassis ground (−):
Front door LH:
(i84) No. 32 (+) — Chassis ground (−):
Rear door RH:
(i84) No. 6 (+) — Chassis ground (−):
Rear door LH:
(i84) No. 20 (+) — Chassis ground (−):
Rear gate:
(i84) No. 33 (+) — Chassis ground (−):
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Is the voltage 10 V or more when each door or rear gate is closed?
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4.CHECK DOOR SWITCH.
1) Disconnect the door switch harness connector.
2) Measure the resistance between door switch terminals.
Connector & terminal
(R12) Front RH door switch:
(R9) Front LH door switch:
(R16) Rear RH door switch:
(R22) Rear LH door switch:
No. 1 — No. 3:
Rear gate latch switch:
(D46) No. 3 — No. 4:
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Is the resistance 1 MΩ or more when door switch is pushed?
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5.CHECK DOOR SWITCH.
Measure the resistance between door switch terminals.
Connector & terminal
(R12) Front RH door switch:
(R9) Front LH door switch:
(R16) Rear RH door switch:
(R22) Rear LH door switch:
No. 1 — No. 3:
Rear gate latch switch:
(D46) No. 3 — No. 4:
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Is the resistance less than 1 Ω when door switch is released?
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Check the harness for open or short circuits between the body integrated unit and the door switch, and between the door switch and chassis ground.
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7. CHECK KEY WARNING SWITCH
1.CHECK KEY WARNING SWITCH.
Check the input signal from the key warning switch to the body integrated unit using the Subaru Select Monitor.
1) Prepare the Subaru Select Monitor kit.
2) On the «System Selection Menu», select {Integ. Unit mode}.
3) Select the {Current Data Display & Save}.
4) Operate the ignition switch and check the input signal to the body integrated unit.
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Is the proper input signal displayed when the key is inserted and removed from the ignition switch?
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The key warning switch is OK.
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2.CHECK FUSE.
Remove and visually check the fuse No. 14 (in the main fuse box).
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Replace the fuse with a new part.
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3.CHECK KEY WARNING SWITCH CIRCUIT.
1) Disconnect the harness connector of body integrated unit.
2) Insert the key into the ignition switch. (LOCK position)
3) Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(B279) No. 2 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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4.CHECK KEY WARNING SWITCH CIRCUIT.
1) Remove the key from ignition switch.
2) Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(B279) No. 2 (+) — Chassis ground (−):
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The key warning switch is OK.
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5.CHECK KEY WARNING SWITCH.
1) Disconnect the key warning switch harness connector.
2) Insert the key into the ignition switch. (LOCK position)
3) Measure the resistance between key warning switch terminals.
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Is the resistance less than 1 Ω?
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Replace the key warning switch.
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6.CHECK KEY WARNING SWITCH.
1) Remove the key from ignition switch.
2) Measure the resistance between key warning switch terminals.
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Is the resistance 1 MΩ or more?
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Check the following:
• Harness for open circuits and shorts between the key warning switch and fuse.
• Harness for open or short between the body integrated unit and key warning switch
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Replace the key warning switch.
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8. CHECK ROOM LIGHT OPERATION
1.CHECK ROOM LIGHT OPERATION.
Make sure the room light illuminates when the room light switch is turned to ON.
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Does the room light illuminate?
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Check the room light circuit.
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2.CHECK HARNESS BETWEEN ROOM LIGHT AND BODY INTEGRATED UNIT.
1) Disconnect the body integrated unit harness connector and room light harness connector.
2) Measure the resistance between the body integrated unit harness connector terminal and room light harness connector terminal.
Connector & terminal
(B279) No. 5 — (R52) No. 2:
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Is the resistance less than 10 Ω?
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The room light operation circuit is OK.
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Check the harness for open or short between body integrated unit and room light.
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9. CHECK HAZARD LIGHT OPERATION
1.CHECK HAZARD LIGHT OPERATION.
Make sure the hazard light blinks when hazard switch is turned to ON.
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Does the hazard light blink?
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Check the hazard light circuit.
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2.CHECK OUTPUT TO HAZARD LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the key warning switch harness connector.
3) Prepare the Subaru Select Monitor kit.
4) Turn the ignition switch to ON (engine OFF) and run the “PC application for Subaru Select Monitor”.
5) On the «System Selection Menu», select {Integ. Unit mode}.
6) Select {ECU customizing}.
7) Check {Hazard answer-back setup}, and then switch to ON setting if necessary.
8) Select the {Current Data Display & Save}.
9) Remove the key from ignition switch.
10) When operate the lock/unlock button of keyless transmitter, check the hazard output signal of body integrated unit.
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Is output signal is present when operating the keyless transmitter lock/unlock button?
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Check the body integrated unit.
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3.CHECK CIRCUIT OF HAZARD LIGHT.
1) Disconnect the harness connector of body integrated unit.
2) Disconnect the turn signal and hazard unit harness connector.
3) Measure the resistance between harness connector terminals.
Connector & terminal
(B281) No. 22 — (B32) No. 8:
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Is the resistance less than 10 Ω?
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Check the body integrated unit.
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10. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITHOUT DOUBLE LOCK AND WITHOUT KEYLESS ACCESS SYSTEM)
For the diagnosis procedures, refer to the door lock control system.
11. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITH DOUBLE LOCK AND WITHOUT KEYLESS ACCESS SYSTEM)
For the diagnosis procedures, refer to the door lock control system.
12. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITHOUT DOUBLE LOCK AND WITH KEYLESS ACCESS SYSTEM)
For the diagnosis procedures, refer to the door lock control system.
13. CHECK DOOR LOCK ACTUATOR AND CIRCUIT (MODEL WITH DOUBLE LOCK AND WITH KEYLESS ACCESS SYSTEM)
For the diagnosis procedures, refer to the door lock control system.
14. CHECK IGNITION SWITCH ILLUMINATION
1.CHECK FUSE.
Remove and visually check the fuse No. 14 (in the main fuse box).
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Replace the fuse with a new part.
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2.CHECK POWER SUPPLY.
1) Disconnect the ignition switch illumination harness connector.
2) Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(B224) No. 2 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Check the harness for open or short circuits between the ignition switch illumination and fuse.
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3.CHECK IGNITION SWITCH ILLUMINATION CIRCUIT.
1) Disconnect the harness connector of body integrated unit and ignition switch illumination harness connector.
2) Measure the resistance between body integrated unit harness connector terminal and ignition switch illumination harness connector terminal.
Connector & terminal
(B281) No. 23 — (B224) No. 1:
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Is the resistance less than 10 Ω?
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Replace the ignition switch illumination bulb with a new part.
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Check the harness for open circuits and shorts between the body integrated unit and ignition switch illumination.
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15. DOUBLE LOCK OPERATION CHECK
1.CHECK FORCED OPERATION.
Using the Subaru Select Monitor, execute the [Double lock output] function check of the body integrated unit.
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Did the double lock operate in the function check?
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Check the lock actuator.
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2.CHECK SYSTEM.
Check the vehicle system.
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Is this a model with keyless access?
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3.CHECK OPERATION WITH DOOR KEY SWITCH.
1) Turn the ignition switch to OFF.
2) Remove the key from the ignition switch.
3) Close all doors and rear gate (except for trunks of sedans).
4) Turn the driver’s door key cylinder to the lock direction.
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Check the door key switch.
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4.CHECK OPERATION WITH DOOR KEY SWITCH.
1) Turn the ignition switch to OFF.
2) Remove the key from the ignition switch.
3) Close all doors and rear gate (except for trunks of sedans).
4) Turn the driver’s door key cylinder to the unlock direction.
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Does the double lock disengage?
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Check the door key switch.
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5.CHECK OPERATION WITH MANUAL LOCK SWITCH.
1) Turn the ignition switch to OFF.
2) Remove the key from the ignition switch.
3) Close all doors and rear gate (except for trunks of sedans).
4) Push the driver’s door manual lock switch to the lock direction.
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Check the door lock switch.
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6.CHECK OPERATION WITH DOOR KEY LOCK SWITCH.
1) Turn the ignition switch to OFF.
2) Remove the key from the ignition switch.
3) Close all doors and rear gate (except for trunks of sedans).
4) Push the driver’s door manual lock switch to the unlock direction.
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Does the double lock disengage?
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Check the door lock switch.
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7.CHECK OPERATION WITH KEYLESS ENTRY LOCK BUTTON.
1) Turn the ignition switch to OFF.
2) Remove the key from the ignition switch.
3) Close all doors and rear gate (except for trunks of sedans).
4) Press the lock button of the keyless entry transmitter.
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Check the keyless entry.
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8.CHECK OPERATION WITH KEYLESS ENTRY UNLOCK BUTTON.
1) Turn the ignition switch to OFF.
2) Remove the key from the ignition switch.
3) Close all doors and rear gate (except for trunks of sedans).
4) Press the unlock button of the keyless entry transmitter.
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Does the double lock disengage?
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Check the keyless entry.
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9.CHECK OPERATION WITH DOOR KEY SWITCH.
1) Remove the key from the ignition switch.
2) Close all doors and rear gate (except for trunks of sedans).
3) Turn the driver’s door key cylinder to the lock direction.
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Check the door key switch.
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10.CHECK OPERATION WITH DOOR KEY SWITCH.
1) Check that the key warning is not sounding.
2) Close all doors and rear gate (except for trunks of sedans).
3) Turn the driver’s door key cylinder to the unlock direction.
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Does the double lock disengage?
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Check the door key switch.
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11.CHECK OPERATION WITH MANUAL LOCK SWITCH.
1) Check that the key warning is not sounding.
2) Close all doors and rear gate (except for trunks of sedans).
3) Push the driver’s door manual lock switch to the lock direction.
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Check the door lock switch.
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12.CHECK OPERATION WITH DOOR KEY LOCK SWITCH.
1) Check that the key warning is not sounding.
2) Close all doors and rear gate (except for trunks of sedans).
3) Push the driver’s door manual lock switch to the unlock direction.
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Does the double lock disengage?
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Check the door lock switch.
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13.CHECK OPERATION WITH ACCESS KEY LOCK BUTTON.
1) Check that the key warning is not sounding.
2) Close all doors and rear gate (except for trunks of sedans).
3) Press the lock button of the access key.
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Check the keyless access system.
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14.CHECK OPERATION WITH ACCESS KEY UNLOCK BUTTON.
1) Check that the key warning is not sounding.
2) Close all doors and rear gate (except for trunks of sedans).
3) Press the unlock button of the access key.
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Does the double lock disengage?
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Check the keyless access system.
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