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DTC P0118 [L3]

BME010200100232

DTC P0118 | ECT circuit high input
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DETECTION CONDITION | • The PCM monitors ECT sensor signal at PCM terminal 1M. If the PCM detects the ECT sensor voltage above 4.5 V, the PCM determines that the ECT sensor circuit has a 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 available if PCM detects the above malfunction condition.
• 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 1M • Short to power circuit between ECT sensor terminal A and PCM terminal 1M • Open circuit between ECT sensor terminal B and PCM terminal 2H • Poor connection of ECT sensor or PCM connectors
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE [L3].) • Is the same DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3].)
2 | INSPECT POOR CONNECTION OF ECT SENSOR CONNECTOR • Turn the ignition switch off. • Disconnect 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 8.
No | Go to the next step.
3 | CLASSIFY ECT SENSOR MALFUNCTION OR HARNESS MALFUNCTION • Connect the WDS or equivalent to the DLC-2. • Access ECT PID. • Connect a jumper wire between ECT sensor terminals A and B. • Verify ECT value.
• Is the voltage below 4.5 V?
Yes
Replace the ECT sensor, then go to Step 8.
No | Go to the next step.
4 | 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 8.
No | Go to the next step.
5 | INSPECT POOR CONNECTION OF PCM CONNECTOR • 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 8.
No | Go to the next step.
6 | INSPECT ECT SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between ECT sensor terminal A (wiring harness-side) and PCM terminal 1M. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open, then go to Step 8.
7 | INSPECT ECT SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between ECT sensor terminal B (wiring harness-side) and PCM terminal 2H. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open, then go to the next step.
8 | 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. • Perform KOEO/KOER self-test. (See KOEO/KOER SELF-TEST PROCEDURE [L3].)
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3].)
No | Troubleshooting completed.