DTC 15

id070200803000

DTC 15

ECT sensor system inspection

POSSIBLE CAUSE

•  ECT sensor malfunction

•  PCM malfunction

•  Open or short circuit in wiring harnesses between ECT sensor connector and PCM connector

•  Open circuit in wiring harness between A/C amplifier connector terminal 2O and PCM connector terminal 1AN

•  Short to ground in wiring harness between A/C amplifier connector terminal 2O and PCM connector terminal 1AN

DTC 15	ECT sensor system inspection
POSSIBLE CAUSE	• ECT sensor malfunction • PCM malfunction • Open or short circuit in wiring harnesses between ECT sensor connector and PCM connector • Open circuit in wiring harness between A/C amplifier connector terminal 2O and PCM connector terminal 1AN • Short to ground in wiring harness between A/C amplifier connector terminal 2O and PCM connector terminal 1AN

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY THAT THE DTC OF THE PCM • Connect the M-MDS to the DLC-2. • Verify that the DTC of the PCM. (See PCM INSPECTION [13B-MSP].) • Is displayed P0117 or P0118?	Yes	Perform troubleshooting according to the corresponding DTC inspection.
1		No	Go to the next step.
2	INSPECT ECT SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT • Disconnect the A/C amplifier connector (16-pin) and the PCM connector (30-pin). • Is there an open circuit in the wiring harness between A/C amplifier connector (16-pin) terminal 2O and PCM connector terminal 1AN?	Yes	Repair the wiring harness.
2		No	Go to the next step.
3	INSPECT ECT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2O and PCM connector terminal 1AN?	Yes	Repair the wiring harness.
3		No	The system is normal at present. (Clear the past malfunction from memory.)