DTC P0117 [L3 Turbo]

id0102b7804000

DTC P0117

ECT sensor circuit low input

DETECTION CONDITION

•  The PCM monitors the ECT sensor signal. If the PCM detects 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.

•  FREEZE FRAME DATA is available.

•  DTCs are stored in the PCM memory.

POSSIBLE CAUSE

•  Engine overheating (Cooling system malfunction)

•  ECT sensor malfunction

•  Connect or terminal malfunction

•  Short to ground in the wiring harness between ECT sensor terminal A and PCM connector terminal 2AH

•  Short to each wiring harness in ECT signal circuit and ECT ground circuit

•  PCM malfunction

DTC P0117	ECT sensor circuit low input
DETECTION CONDITION	• The PCM monitors the ECT sensor signal. If the PCM detects 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. • FREEZE FRAME DATA is available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• Engine overheating (Cooling system malfunction) • ECT sensor malfunction • Connect or terminal malfunction • Short to ground in the wiring harness between ECT sensor terminal A and PCM connector terminal 2AH • Short to each wiring harness in ECT signal circuit and ECT ground circuit • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
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.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform the repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY ENGINE CONDITION • Is the engine overheating?	Yes	Perform the symptom troubleshooting No.17 Cooling system concerns-Overheating procedure. (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L3 Turbo].)
3	VERIFY ENGINE CONDITION • Is the engine overheating?	No	Go to the next step.
4	INSPECT FOR BENT TERMINALS • Turn the ignition switch off. • Disconnect the ECT sensor connector. • Inspect ECT sensor terminals A and B (part-side) for bending. • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 8.
4		No	Go to the next step.
5	CLASSIFY ECT SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION • Connect the M-MDS to DLC-2. • Access the ECT PID. • Verify the ECT value when disconnecting the ECT sensor connector. • Does the ECT value change?	Yes	Replace the ECT sensor, then go to Step 8. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)
5		No	Go to the next step.
6	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 a short to ground, then go to Step 8.
6		No	Go to the next step.
7	INSPECT ECT 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.
7		No	Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P0117 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [L3 Turbo].)
9		No	Troubleshooting completed.