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*NO RESPONSE FROM TCM (POWERTRAIN CONTROL MODULE) (CONTINUED) For a complete wiring diagram Refer to Section 8W. Possible Causes (A919) FUSED B(+) CIRCUIT OPEN OR SHORTED (Z908) (Z977) (Z904) GROUND CIRCUIT OPEN (F202) (F924) FUSED IGNITION SW OUTPUT CIRCUIT OPEN OR SHORTED (D65) CAN C BUS (+) CIRCUIT OPEN (D64) CAN C BUS (-) CIRCUIT OPEN POWERTRAIN CONTROL MODULE Diagnostic Test 1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts. NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active NOTE: Check the FCM for any active CAN C hardware DTCs, perform DTC before proceeding. Does the scan tool display a red X next to the module? Yes >> Go To 2 No >> The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con- 2. ATTEMPT TO COMMUNICATE WITH THE PCM With the scan tool in ECU view, observe the status of the PCM. Does the scan tool display a red X next to the PCM? Yes >> Refer to the No Response From PCM test procedure. Refer to the table of contents in this section. No >> Go To 3 8E - 148 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS ND |