General Pinpoint Test 7: Pcm Power Relay

GENERAL PINPOINT TEST 7: PCM POWER RELAY

PINPOINT TEST 7		POSITIVE CRANKCASE VENTILATION PCV SYSTEM
STEP	INSPECTION		ACTION
1	CHECK VPWR CIRCUIT RESISTANCE Disconnect: idle air control (IAC) valve. Disconnect: WDS or equivalent tester from DLC. Disconnect: powertrain control module (PCM) power relay. Measure resistance of VPWR circuit (R) between IAC valve connector 0140-01 and PCM power relay connector. Is resistance less than 5.0 ohms?	Yes	Connect IAC valve. Go to next step.
1		No	Repair open VPWR circuit (R) between the PCM power relay and the splice to the IAC valve. Restore vehicle. Rerun quick test. See PCM QUICK TEST .
2	CHECK B+ AND IGN START/RUN VOLTAGE TO PCM POWER RELAY Measure B+ circuit (Y) voltage at the PCM power relay connector. Key ON, Engine OFF (KOEO). Measure IGN START/RUN circuit (T/B) voltage at PCM Power Relay connector. Are both voltages greater than 10.5 volts?	Yes	Go to next step.
2		No	Key OFF. Repair open in B+ (Y) or IGN START/RUN (T/B) circuit, verify condition of PCM diode. Restore vehicle. Rerun quick test. See PCM QUICK TEST .
3	CHECK GROUND CIRCUIT TO POWER RELAY Measure voltage between B+ (Y) circuit and ground (B/W) circuit at PCM power relay connector. Key OFF. Is the voltage greater than 10.5 volts?	Yes	Replace PCM power relay. Restore vehicle. Rerun quick test. See PCM QUICK TEST .
3		No	Repair open ground circuit. Restore vehicle. Rerun quick test. See PCM QUICK TEST .