B219A-IGNITION UNLOCK RUN/START CONTROL CIRCUIT OVERCURRENT
B219A-IGNITION UNLOCK RUN/START CONTROL CIRCUIT OVERCURRENT
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on.
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Set Condition:
Over current condition detected on the (F1) Ignition Switch Output (Unlock-Run-Start) circuit.
Possible Causes |
|---|
| (F1) IGNITION SWITCH OUTPUT (UNLOCK-RUN-START) CIRCUIT SHORT TO GROUND |
| ELECTRONIC SHIFT MODULE (ESM)/SHIFT LEVER ASSEMBLY |
| TOTALLY INTEGRATED POWER MODULE (TIPM) |
| 1. | With the scan tool, record and erase DTCs. |
| 2. | Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds. |
| 3. | With the scan tool, read the active DTCs. |
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
2. CHECK FOR AN INTERNAL CONCERN WITH ESM/SHIFT LEVER ASSEMBLY
| 1. | Turn the ignition off. |
| 2. | Disconnect the Shift Lever Assembly harness connector. |
| 3. | Turn the ignition on. |
| 4. | Cycle the ignition switch from off to on, leaving the ignition off for a minimum of 30 seconds. |
| 5. | With the scan tool, read the active DTCs. |
Does the scan tool display this DTC as active?
Yes
- Go To 3
No
- Replace the Shift Lever Assembly in accordance with the Service Information. (Refer to 21 - Transmission and Transfer Case/Automatic - NAG1/SHIFTER, Transmission - Removal) .
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
3. CHECK THE (F1) IGNITION SWITCH OUTPUT (UNLOCK-RUN-START) CIRCUIT FOR A SHORT TO GROUND
 |
| 1. | Turn the ignition off. |
| 2. | Disconnect the TIPM C1 harness connector. |
| 3. | Measure the resistance between ground and the (F1) Ignition Switch Output (Unlock-Run-Start) circuit. |
Is the resistance above 10k Ohms?
Yes
- Replace the TIPM in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Totally Integrated Power (TIPM) - Removal).
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Repair the short to ground in the (F1) Ignition Switch Output (Unlock-Run-Start) circuit.
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Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).