DTC P0117:00 [MZR-CD 2.2]

id0102f3701600

DTC P0117:00

Engine coolant temperature (ECT) sensor circuit low input

DETECTION CONDITION

•  The PCM monitors the input signal from the ECT sensor. If the voltage from the ECT sensor is less than 0.13 V, the PCM determines that there is a malfunction in the ECT sensor circuit.

Monitoring condition

•  Battery voltage: 8—20 V

Diagnostic support note

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

•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA (mode2) and snapshot data are available.

•  The DTC is stored in the PCM memory.

•  Engine overheating (cooling system malfunction)

POSSIBLE CAUSE

•  Engine overheating (Cooling system malfunction)

•  ECT sensor connector or terminal malfunction

•  Short to ground in wiring harness between ECT sensor terminal A and PCM terminal 1BF

•  ECT sensor malfunction

•  PCM connector or terminal malfunction

•  PCM malfunction

DTC P0117:00	Engine coolant temperature (ECT) sensor circuit low input
DETECTION CONDITION	• The PCM monitors the input signal from the ECT sensor. If the voltage from the ECT sensor is less than 0.13 V, the PCM determines that there is a malfunction in the ECT sensor circuit. Monitoring condition • Battery voltage: 8—20 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (mode2) and snapshot data are available. • The DTC is stored in the PCM memory. • Engine overheating (cooling system malfunction)
POSSIBLE CAUSE	• Engine overheating (Cooling system malfunction) • ECT sensor connector or terminal malfunction • Short to ground in wiring harness between ECT sensor terminal A and PCM terminal 1BF • ECT sensor malfunction • PCM connector or terminal malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED • Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (mode2) and snapshot 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 CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Start the engine. • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].) • Is the same DTC present?	Yes	Go to the next step.
3		No	Intermittent concern exists. Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”. (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4	VERIFY ENGINE CONDITION • Is the engine overheating.	Yes	Perform the symptom troubleshooting No.19 Cooling system concerns-Overheating procedure. (See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)
4	VERIFY ENGINE CONDITION • Is the engine overheating.	No	Go to the next step.
5	INSPECT ECT SENSOR CONNECTOR FOR POOR CONNECTION • Switch the ignition to off. • Disconnect the 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 9.
5		No	Go to the next step.
6	INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND • ECT sensor connector is disconnected. • Inspect for continuity between ECT sensor terminal A (wiring harness-side) and body ground. • Is there continuity?	Yes	If the short to ground circuit could be detected: • Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].) Go to Step 9.
6		No	Go to the next step.
7	INSPECT ECT SENSOR • Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZR-CD 2.2].) • Is there any malfunction?	Yes	Replace the ECT sensor, then go to Step 9. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
7		No	Go to the next step.
8	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Switch the ignition to off. • Disconnect the PCM 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 the next step.
8		No	Go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P0117:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Start the engine. • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].)
10		No	DTC troubleshooting completed.