DTC P0115 [G6]

id010295954200

DTC P0115

ECT sensor circuit malfunction
DETECTION CONDITION
•  Input voltage from the ECT sensor is blow 0.07 V or above 4.58 V when the ignition switch is turned to the ON position.
POSSIBLE CAUSE
•  ECT sensor malfunction
•  Poor connection of connectors at ECT sensor terminal and/or PCM
•  Leakage in intake-air system
•  Short to power supply circuit in wiring from ECT sensor terminal A to PCM terminal 2Q
•  Short to ground in wiring from ECT sensor terminal A to PCM terminal 2Q
•  Open circuit in wiring from ECT sensor terminal A to PCM terminal 2Q
•  Open circuit in wiring from ECT sensor terminal B to PCM terminal 2D
•  Open circuit in wiring from PCM terminal 2C to engine ground

Diagnostic procedure

STEP

INSPECTION

ACTION
1
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.
2
•  Verify stored DTC.
•  Have DTCs P0100, P0120, P0134, P1110, and/or P1170 been stored?
Yes
Inspect for open circuit following wiring harnesses, then go to Step 9.
•  PCM terminal 2D and MAF sensor, O2S, IAT sensor, and/or TP sensor
•  PCM terminal 2C and engine ground
No
Go to the next step.
3
•  Does ECT sensor connector or PCM connector have poor connection?
Yes
Repair or replace connector, then go to Step 9.
No
Go to the next step.
4
•  Disconnect ECT sensor connector.
•  Turn the ignition switch to the ON position.
•  Is there 5V at ECT sensor harness side connector terminal A
Yes
Go to the next step.
No
Inspect for open or short circuit in wiring harness (between PCM terminal 2Q and ECT sensor terminal A), then go to Step 9.
5
•  Disconnect PCM connector.
•  ECT sensor connector is disconnected.
•  Is there continuity between ECT sensor harness side connector terminal B and PCM harness side connector terminal 2D?
Yes
Go to the next step.
No
Repair open circuit, then go to Step 9.
6
•  Is there continuity from PCM harness side connector terminals 2Q to 1B?
Yes
Repair short to power circuit, then go to Step 9.
No
Go to the next step.
7
•  Is there continuity from PCM harness side connector terminals 2Q to body ground?
Yes
Repair short to ground circuit, then go to Step 9.
No
Go to the next step.
8
•  Is ECT sensor normal?
Yes
Go to the next step.
No
Replace the ECT sensor, then go to Step 9.
(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [G6].)
9
VERIFY TROUBLESHOOTING OF DTC P0115 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear DTC from memory using the M-MDS.
•  Start engine.
•  Retrieve the DTCs using the M-MDS.
•  Is same DTC present?
Yes
Replace the PCM, then go to next step.
No
Go to next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform “AFTER REPAIR PROCEDURE”.
•  Is there any DTC present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [G6].)
No
Troubleshooting completed.