DTC P0118 (6-Speed A/T, '16-'18 9-Speed A/T)
DTC P0118 : ECT Sensor 1 Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0118 ECT Sensor 1 Circuit High Voltage |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode.
- 2. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit ECT SENSOR 1 More than 4.92 V Do the current condition (s) match the threshold?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems
- ECT sensor 1 check
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
ECT sensor 1 2P connector - 3. Connect terminals A and B with a jumper wire.
Terminal A ECT sensor 1 2P connector No. 1 Terminal B ECT sensor 1 2P connector No. 2 - 4. Turn the vehicle to the ON mode.
- 5. Check the parameter (s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit ECT SENSOR 1 More than 4.92 V Do the current condition (s) match the threshold?
YES
Go to step 3.
NO
Replace ECT sensor 1 - Refer to: ECT Sensor 1 Removal and Installation .
- Determine possible failure area (TW line, others)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Remove the jumper wire from the ECT sensor 1 2P connector.
- 3. Turn the vehicle to the ON mode.
- 4. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode ECT sensor 1 2P connector: disconnected Test point 1 ECT sensor 1 2P connector No. 2 Test point 2 Body ground Is there about 5.0 V?
YES
Go to step 4.
NO
Go to step 5.
- Open wire check (SG2 line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS, and wait more than 1 minute.
- 3. Disconnect the following connector.
PCM connector B (51P) - 4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode
ECT sensor 1 2P connector: disconnected PCM connector B (51P): disconnected Test point 1 ECT sensor 1 2P connector No. 1 Test point 2 PCM connector B (51P) No. 45 - Refer to:
PCM Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020), or
PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018)Is there continuity?
YES
The SG2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to: PCM Removal and Installation (6-Speed A/T), (9-Speed A/T 2016 2017 2018) .
NO
Repair an open in the SG2 wire between the PCM (B45) and ECT sensor 1.
- Open wire check (TW line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS, and wait more than 1 minute.
- 3. Disconnect the following connector.
PCM connector C (51P) - 4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode
ECT sensor 1 2P connector: disconnected PCM connector C (51P): disconnected Test point 1 ECT sensor 1 2P connector No. 2 Test point 2 PCM connector C (51P) No. 48 - Refer to:
PCM Connector for Inputs and Outputs (6-Speed A/T) (2016 2017 2018 2019 2020), or
PCM Connector for Inputs and Outputs (9-Speed A/T) (2016 2017 2018)Is there continuity?
YES
The TW wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good PCM - Refer to: PCM Removal and Installation (6-Speed A/T), (9-Speed A/T 2016 2017 2018) .
NO
Repair an open in the TW wire between the PCM (C48) and ECT sensor 1.