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DTC P0117 [L8, LF, L3]

id0102a1804000

DTC P0117 | ECT sensor circuit low input
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DETECTION CONDITION | • The PCM monitors the ECT sensor signal. If the PCM detects that the ECT sensor voltage is below 0.2 V, the PCM determines that the ECT sensor circuit has a malfunction. Diagnostic support note • This is a continuous monitor (Engine cooling system). • The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition. • FREEZE FRAME DATA is available. • Are any DTCs is stored in the PCM memory.
POSSIBLE CAUSE | • ECT sensor malfunction • Connect or terminal malfunction • Short to ground in wiring harness between ECT sensor terminal A and PCM connector terminal 2AH • Short to each wiring harness ECT signal circuit and ECT ground circuit • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service information. If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT ECT SENSOR CONNECTOR FOR POOR CONNECTION • 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 7.
No | Go to the next step.
4 | CLASSIFY ECT SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION • Connect the WDS or equivalent to DLC-2. • Access ECT PID. • Verify ECT value when disconnecting ECT sensor connector. • Does the ECT value change? | Yes | Replace the ECT sensor, then go to Step 7.
No | Go to the next step.
5 | INSPECT ECT SIGNAL CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch off. • inspect for continuity between ECT sensor terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground, then go to Step 7.
No | Go to the next step.
6 | INSPECT IAT CIRCUIT FOR SHORT TO WIRING HARNESSES • Inspect for continuity between ECT sensor terminal A and B (wiring harness-side). • Is there continuity? | Yes | Repair or replace the wiring harness for a short, then go to the next step.
No | Go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0117 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [L8, LF, L3].) • Is the DTC P0117 present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF, L3].)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L8, LF, L3].) • Are any DTC present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L3].)
No | Troubleshooting completed.