Diagnostic Instructions
DTC Descriptors
DTC P064C: Glow Plug Control Module Performance
Circuit/System Description
This DTC applies to internal microprocessor integrity conditions within the glow plug control module.
Conditions for Running the DTC
| • | The battery voltage is between 9-16 volts. |
| • | The DTC runs once per ignition cycle when the above condition is met. |
Conditions for Setting the DTC
The ECM detects a glow plug control module malfunction.
Action Taken When the DTC Sets
DTC P064C is a Type A DTC.
Conditions for Clearing the DTC
DTC P064C is a Type A DTC.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List. DTC P064C should not set.
Circuit/System Testing
- Ignition OFF, and the MAIN fuse removed, disconnect the harness connector at the glow plug control module.
- Test for less than 5 ohms of resistance between the ground circuit terminal 7 and ground.
| ⇒ | If greater than the specified range, repair the ground circuit for an open/high resistance. |
- Test for greater than 1 ohm of resistance between each of the glow plug circuit terminals 1-4 and ground.
| ⇒ | If less than the specified range, repair the glow plug circuit for a short to ground. |
- Install the MAIN fuse. Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 6 and ground.
| ⇒ | If the test lamp does not illuminate, repair the ignition voltage circuit for a short to ground or an open/high resistance. |
- If all circuits test normal, replace the glow plug control module.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
