P0615-STARTER CONTROL CIRCUIT/OPEN
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For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
When the ignition switch is on, the Totally Integrated Power Module (TIPM) sends a 12 Volt signal to the Powertrain Control Module (PCM) on the Starter Relay Control circuit. When the ignition switch is turned to the Start/Crank position, the PCM grounds this signal to indicate a request for Starter Motor operation.
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When Monitored:
With the ignition on and the Starter command off.
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Set Condition:
The PCM does not detect voltage on the (T752) Starter Relay Control circuit for 0.5 second.
Possible Causes |
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| (T752) STARTER RELAY CONTROL CIRCUIT SHORTED TO GROUND |
| (T752) STARTER RELAY CONTROL CIRCUIT OPEN/HIGH RESISTANCE |
| TOTALLY INTEGRATED POWER MODULE |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| 1. | Ignition on, engine not running. |
| 2. | With the scan tool, clear DTCs in the Powertrain Control Module (PCM). |
| 3. | Attempt to start the engine several times. |
| 4. | Monitor the scan tool for at least two minutes. |
| 5. | With the scan tool, select View DTCs. |
Is the status Active for this DTC?
Yes
- Go To 2
No
- Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. CHECK THE (T752) STARTER RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
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| 1. | Turn the ignition off. |
| 2. | Disconnect the TIPM C2 harness connector. |
| 3. | Disconnect the PCM C2 harness connector. |
| 4. | Measure the resistance between ground and the (T752) Starter Relay Control circuit in the TIPM C2 harness connector. |
Is the resistance above 10k Ohms?
Yes
- Go To 3
No
- Repair the (T752) Starter Relay Control circuit for a short to ground.
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Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard Procedure).
3. CHECK THE (T752) STARTER RELAY CONTROL CIRCUIT FOR AN OPEN/HIGH RESISTANCE
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| 1. | Measure the resistance of the (T752) Starter Relay Control circuit between the TIPM C2 harness connector and the PCM C2 harness connector. |
Is the resistance below 5.0 Ohms?
Yes
- Replace and program the Totally Integrated Body Module in accordance with the service information.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Repair the (T752) Starter Relay Control circuit for an open or high resistance.
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Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard Procedure).