|
STEP
|
INSPECTION
|
ACTION
|
|
1
|
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related repair information available?
|
Yes
|
Perform repair or diagnosis according to available Service Information.
• If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
|
2
|
VERIFY DTC P1602 DETECTED AGAIN
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
|
Yes
|
Go to Step 10.
|
|
No
|
Go to the next step.
|
|
3
|
INSPECT POOR CONNECTION OF IMMOBILIZER UNIT CONNECTOR
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, go to Step 19.
|
|
No
|
Go to the next step.
|
|
4
|
INSPECT IMMOBILIZER CONTROL UNIT GND CIRCUIT FOR OPEN
• Turn the engine switch off.
• Inspect for continuity between immobilizer unit terminal C and body GND.
• Is there continuity?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the wiring harness for an open circuit, go to Step 19.
|
|
5
|
INSPECT POOR CONNECTION OF COIL CONNECTOR
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, go to Step 19.
|
|
No
|
Go to the next step.
|
|
6
|
INSPECT COIL FOR SHORT TO GND
• Turn the engine switch off.
• Inspect for continuity between coil terminal A and body GND.
• Is there continuity?
|
Yes
|
Replace the coil, go to Step 19.
|
|
No
|
Go to the next step.
|
|
7
|
INSPECT COIL CIRCUIT FOR SHORT TO GND
• Turn the engine switch off.
• Inspect for continuity between immobilizer unit terminal F and body GND.
• Is there continuity?
|
Yes
|
Repair or replace the wiring harness for short to GND, go to Step 19.
|
|
No
|
Go to the next step.
|
|
8
|
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, go to Step 19.
|
|
No
|
Go to the next step.
|
|
9
|
INSPECT IMMOBILIZER UNIT SIGNAL CIRCUIT FOR OPEN
• Turn the engine switch off.
• Inspect for continuity between immobilizer unit terminal A and PCM terminal 54.
• Is there continuity?
|
Yes
|
Go to step 19.
|
|
No
|
Repair or replace the wiring harness for an open circuit, go to Step 19.
|
|
10
|
CLASSIFY MALFUNCTION BY ANOTHER DETECTED DTCS
• Is DTC P1602 present?
|
Yes
|
Go to Step 14.
|
|
No
|
Go to the next step.
|
|
11
|
INSPECT POOR CONNECTION OF COIL CONNECTOR
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, go to Step 19.
|
|
No
|
Go to the next step.
|
|
12
|
INSPECT COIL FOR OPEN
• Turn the engine switch off.
• Inspect for continuity between coil terminals A and C.
• Is there continuity?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the coil, go to Step 19.
|
|
13
|
INSPECT COIL CIRCUIT FOR OPEN
• Turn the engine switch off.
• Inspect for continuity between immobilizer unit terminals D and F.
• Is there continuity?
|
Yes
|
Go to Step 19.
|
|
No
|
Repair or replace the wiring harness for an open circuit, go to Step 19.
|
|
14
|
CLASSIFY MALFUNCTION BY OTHER DETECTED DTCS.
• Is immobilizer unit DTC 03 present?
|
Yes
|
Key does not have transponder, change to registered key.
Go to Step 19.
|
|
No
|
Go to the next step.
|
|
15
|
CLASSIFY MALFUNCTION BY OTHER DETECTED DTCS.
• Is immobilizer unit DTC 01 present?
|
Yes
|
Key is not registered.
Reprogram key or use another registered key, go to the next step.
|
|
No
|
Go to the next step.
|
|
16
|
INSPECT POOR CONNECTION OF IMMOBILIZER UNIT CONNECTOR
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, go to the next step.
|
|
No
|
Go to the next step.
|
|
17
|
INSPECT IMMOBILIZER UNIT POWER CIRCUIT FOR OPEN
• Turn the engine switch off.
• Inspect the voltage between immobilizer unit terminal J and body GND.
• Is the voltage B+?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the wiring harness for an open circuit, go to Step 19.
|
|
18
|
INSPECT IMMOBILIZER CONTROL UNIT SIGNAL CIRCUIT FOR SHORT TO GND
• Turn the engine switch off.
• Inspect for continuity between immobilizer unit terminal A and body GND.
• Is there continuity?
|
Yes
|
Repair or replace the wiring harness for short to GND, go to the next step.
|
|
No
|
Go to the next step.
|
|
19
|
VERIFY TROUBLESHOOTING OF DTC P1602 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
|
Yes
|
Replace the PCM, go to the next step.
|
|
No
|
Go to the next step.
|
|
20
|
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
Troubleshooting completed.
|
