DTC P0117:00 [MZR-CD 2.2]

id0102f3701600

DTC P0117:00

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 CONDITIONS

―  Battery voltage: 8—20 V

Diagnostic support note

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

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Engine overheating (Cooling system malfunction)

•  ECT sensor connector or terminals malfunction

•  ECT sensor malfunction

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

•  PCM connector or terminals malfunction

•  ECT sensor signal circuit and ground circuit are shorted to each other.

•  PCM malfunction

DTC P0117:00	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 CONDITIONS ― Battery voltage: 8—20 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Engine overheating (Cooling system malfunction) • ECT sensor connector or terminals malfunction • ECT sensor malfunction • Short to ground in wiring harness between ECT sensor terminal A and PCM terminal 1BF • PCM connector or terminals malfunction • ECT sensor signal circuit and ground circuit are shorted to each other. • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/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 INPUT 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” procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4	VERIFY ENGINE CONDITION • Verify the engine condition. • Is the engine overheating?	Yes	Perform the symptom troubleshooting “NO.19 COOLING SYSTEM CONCERNS-OVERHEATING”. (See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)
4		No	Go to the next step.
5	INSPECT ECT SENSOR CONNECTOR CONDITION • 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 connector and/or terminals, then go to Step 10.
5		No	Go to the next step.
6	CLASSIFY ECT SENSOR MALFUNCTION OR WIRING HARNESS MALFUNCTION • Reconnect all disconnected connectors. • Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) • Verify the ECT PID value when disconnecting the ECT sensor connector. • Does the ECT PID value change?	Yes	Replace the ECT sensor, then go to Step 10. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
6		No	Go to the next step.
7	INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND • ECT sensor connector is disconnected. • Switch the ignition to off. • 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 10.
7		No	Go to the next step.
8	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 10.
8		No	Go to the next step.
9	INSPECT ECT SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER • ECT sensor and PCM connectors are disconnected. • Inspect for continuity between ECT sensor terminals A and B (wiring harness-side). • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to each other, then go to the next step.
9		No	Go to the next step.
10	VERIFY DTC TROUBLESHOOTING 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	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
10		No	Go to the next step.
11	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].)
11		No	DTC troubleshooting completed.