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*NO RESPONSE FROM POWERTRAIN CONTROL MODULE (CONTINUED) POSSIBLE CAUSES FUSED B+ CIRCUIT OPEN FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT OPEN PCM GROUND CIRCUITS SCI RECEIVE CIRCUIT OPEN SCI RECEIVE CIRCUIT SHORTED TO GROUND SCI RECEIVE CIRCUIT SHORTED TO VOLTAGE SCI TRANSMIT CIRCUIT OPEN SCI TRANSMIT CIRCUIT SHORTED TO GROUND SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE POWERTRAIN CONTROL MODULE For a complete Data Link Connector Circuit Diagram, (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MOD- Diagnostic Test 1. CHECK COMMUNICATION WITH OTHER MODULES Turn the ignition on. Using the DRB III T , attempt to communicate with any other module. Is the DRB III T able to communicate with the module selected? Yes >> Go to 2 No >> Perform Symptom *No Response From All Modules. 2. FUSED B(+) CIRCUIT OPEN Turn the ignition off. Disconnect the PCM C5 harness connector. Note: Check connector — Clean/repair as necessary. Measure the voltage of the Fused B(+) circuit at the PCM C5 harness Is the voltage above 10 volts? Yes >> Go to 3 No >> Repair the Fused B(+) circuit for an open. Perform POWERTRAIN VERIFICATION TEST - VER 2. ZH ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 9 |