For a complete wiring diagram Refer to Section 8W.Possible CausesFUSED B (+) CIRCUITS OPENFUSED IGNITION SWITCH OUTPUT CIRCUITS OPENGROUND CIRCUITS OPENDIAGNOSTIC CAN C CIRCUITS OPENDIAGNOSTIC CAN C CIRCUITS SHORTED TO GROUNDDIAGNOSTIC CAN C CIRCUITS SHORTED TOGETHERTOTALLY INTEGRATED POWER MODULE1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.Ensure the scan tool is updated to the latest software.If the scan tool displays any error messages involving the Diagnostic CAN C circuits, diagnose and repair the error message before proceeding. Refer to the Table of Contents.A loss of communication with the TIPM can cause the ECU View button on the scan tool to be inoperative (not highlighted).With the scan tool, attempt to select ECU View.Can the scan tool communicate with the TIPM?YesThe 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 connectors for broken, bent, pushed out, and corroded terminals.NoGo To 22. FUSED B (+) CIRCUITS OPEN AT TIPMDisconnect the scan tool from the DLC.Using a 12-volt test light connected to ground, and using the wiring diagram as a guide, check all Fused B (+) circuits at the TIPM.Does the test light illuminate brightly for each circuit?YesGo To 3NoRepair the Fused B(+) circuit for an open or short.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 3. FUSED IGNITION SWITCH OUTPUT CIRCUITS OPEN AT TIPMTurn the ignition on.Using a 12-volt test light connected to ground, and using the wiring diagram as a guide, check each Fused Ignition Switch Output circuit at the TIPM.Does the test light illuminate brightly for each circuit?YesGo To 4NoRepair the Fused Ignition Switch Output circuit for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 4. GROUND CIRCUITS OPEN AT TIPMTurn the ignition off.Using a 12-volt test light connected to 12-volts, and using the wiring diagram as a guide, check all ground circuits at the TIPM.Does the test light illuminate brightly on each circuit?YesGo To 5NoRepair the ground circuit that did not light the test light for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 5. CHECK FOR (D52) DIAGNOSTIC CAN C (+) CIRCUIT OPEN AT DLC

Disconnect the TIPM C7 harness connector.Measure the resistance on the (D52) Diagnostic CAN C (+) circuit between the TIPM C7 harness connector and the DLC.Is the resistance above 10.0 ohms?YesRepair the (D52) Diagnostic CAN C (+) circuit for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoGo To 66. CHECK FOR (D51) DIAGNOSTIC CAN C (-) CIRCUIT OPEN AT DLC

Measure the resistance on the (D51) Diagnostic CAN C (-) circuit between the TIPM C7 harness connector and the DLC.Is the resistance above 10.0 ohms?YesRepair the (D51) Diagnostic CAN C (-) circuit for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoGo To 77. CHECK FOR DIAGNOSTIC CAN C CIRCUITS SHORTED TOGETHER

Measure the resistance between the (D52) Diagnostic CAN C (+) circuit and the (D51) Diagnostic CAN C (-) circuit at the TIPM C7 harness connector.Is the resistance below 100.0 ohms?YesRepair the (D52) Diagnostic CAN C (+) circuit for a short to the (D51) Diagnostic CAN C (-) circuit.Perform the BODY VERIFICATION TEST – VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).NoReplace the Totally Integrated Power Module in accordance with the service information.Perform the BODY VERIFICATION TEST – VER 1.(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).