Test 6: Pcm Power Relay

PCM POWER RELAY

TEST 6		PCM POWER RELAY
STEP	INSPECTION		ACTION
1	CHECK VPWR CIRCUIT RESISTANCE Disconnect idle air control (IAC) valve. Disconnect WDS or equivalent tester from DLC. Disconnect PCM power relay. Measure resistance of VPWR circuit (W/R) between IAC valve connector 0140-116 and PCM Power Relay connector. Is resistance less than 5.0 ohms?	Yes	RECONNECT IAC valve. Go to next step.
1		No	REPAIR open VPWR circuit (W/R) between the PCM Power Relay and the splice to the IAC valve. RESTORE vehicle. RERUN PCM quick test. See PCM QUICK TEST .
2	CHECK B+ AND IGN START/RUN VOLTAGE TO PCM POWER RELAY Measure B+ circuit (B/Y) voltage at the PCM power relay connector. Key ON, Engine OFF (KOEO). Measure IGN START/RUM circuit (W/V) 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+ (B/Y) or IGN START/RUN (W/V) circuit, verify condition of PCM diode. RESTORE vehicle. RERUN PCM quick test. See PCM QUICK TEST .
3	CHECK GROUND CIRCUIT TO POWER RELAY Measure voltage between B+ (B/Y) circuit and ground (B) circuit at PCM Power Relay connector. Key OFF. Was the voltage greater than 10.5 volts?	Yes	REPLACE PCM Power Relay. RESTORE vehicle. RERUN PCM quick test. See PCM QUICK TEST .
3		No	REPAIR open ground circuit. RESTORE vehicle. RERUN PCM quick test. See PCM QUICK TEST .