DTC P0117 [MTX, LF ATX (FS5A-EL)]

id0102b4804000

DTC P0117

ECT sensor circuit low input

DETECTION CONDITION

•  The PCM monitors the ECT sensor signal. If the PCM detects the ECT sensor voltage below 0.2 V, the PCM determines that the ECT sensor circuit has malfunction.

Diagnostic support note

•  This is a continuous monitor (Engine cooling system).

•  The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Engine overheating (Cooling system malfunction)

•  ECT sensor malfunction

•  Connect or terminal malfunction

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

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

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAVE BEEN RECORDED • Have 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 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 [LF, L3].)
3	VERIFY ENGINE CONDITION • Is the engine overheating?	No	Go to the next step.
4	INSPECT TERMINAL BENT • Turn the ignition switch off. • Disconnect the ECT sensor connector. • Inspect for bent of ECT sensor terminals A and B (part-side). • 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 ECT PID. • Verify ECT value when disconnecting 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 [LF, L3].)
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 and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for short to ground, then go to Step 8.
6		No	Go to the next step.
7	INSPECT ECT CIRCUIT FOR SHORT WIRING HARNESSES • Inspect for continuity between ECT sensor terminal A and B. • Is there continuity?	Yes	Repair or replace the wiring harness for 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, or perform the KOEO or KOER self‐test. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [LF, L3].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MTX, LF ATX (FS5A-EL)].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [MTX, LF ATX (FS5A-EL)].)
9		No	Troubleshooting completed.