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P0645-A/C CLUTCH RELAY CIRCUIT (CONTINUED) 3. (F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT Ignition on, engine not running. Using a 12-volt test light connected to ground, probe the (F202) Fused Ignition Switch Output circuit in the connec- Does the test light illuminate brightly? Yes >> Go To 4 No >> Repair the open or short to ground in the (F202) Fused Ignition Switch Output circuit. Check and replace any open fuses. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 4. (C13) A/C CLUTCH RELAY CONTROL CIRCUIT OPEN Turn the ignition off. Disconnect the C3 PCM harness connector. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage Is the resistance below 5.0 ohms? Yes >> Go To 5 No >> Repair the open in the (C13) A/C Clutch Relay Control circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 5. (C13) A/C CLUTCH RELAY CONTROL CIRCUIT SHORTED TO GROUND Measure the resistance between ground and the (C13) A/C Clutch Relay Control circuit at the IPM. Is the resistance below 5.0 ohms? Yes >> Repair the short to ground in the (C13) A/C Relay Clutch Control circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 6 6. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) HB ENGINE ELECTRICAL DIAGNOSTICS 9 - 707 |