DTC P0118 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200100211

DTC P0118

ECT circuit high input

DETECTION CONDITION

• The PCM monitors ECT sensor signal at PCM terminal 38. If the PCM detected ECT sensor voltage above 4.57 V, the PCM determines that the ECT sensor circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• ECT sensor malfunction
• Open circuit between ECT sensor terminal A and PCM terminal 38
• Short to power circuit between ECT sensor terminal A and PCM terminal 38
• Open circuit between ECT sensor terminal B and PCM terminal 91
• Poor connection of ECT sensor or PCM connectors
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT INPUT SIGNAL STATUS- IS CONCERN INTERMITTENT OR CONSTANT
• Connect the WDS or equivalent to the DLC-2.
• Turn the ignition switch to the ON position (Engine off).
• Access ECT PID.
• Is ECT PID above 4.57 V?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERNS TROUBLESHOOTING procedure.
4
INSPECT ECT SENSOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the ECT sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 10.
No
Go to the next step.
5
CLASSIFY ECT SENSOR OR HARNESS MALFUNCTION
• Connect jumper wire between ECT sensor terminals A and B (wiring harness-side)
• Access ECT PID.
• Is ECT PID approx. 0 V?
Yes
Replace the ECT sensor, then go to Step 10.
No
Go to the next step.
6
INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between ECT sensor terminal A (wiring harness-side) and body ground.
• Is the voltage B+?
Yes
Repair or replace the wiring harness for short to power supply, then go to Step 10.
No
Go to the next step.
7
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 10.
No
Go to the next step.
8
INSPECT ECT SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Disconnect the PCM connector.
• Inspect for continuity between ECT sensor terminal A (wiring harness-side) and PCM terminal 38.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for open circuit, then go to Step 10.
9
INSPECT ECT SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between ECT sensor terminal B (wiring harness-side) and PCM terminal 91.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for open circuit, then go to the next step.
10
VERIFY TROUBLESHOOTING OF DTC P0118 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Turn the ignition switch to the ON position (Engine off).
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.