For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P0512 : Starter Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Starter Switch Circuit | -- | -- | P0512 | -- |
Circuit/System Description
When the Ignition is placed in the start position, 12 volts is supplied to the ECM notifying it that crank has been requested. If the ECM detects voltage on the circuit with the engine running, the DTC will set.
Conditions for Running the DTC
| • | Battery voltage is between 10-16 volts. |
| • | The Ignition switch is ON. |
| • | The engine is running. |
Conditions for Setting the DTC
| • | The ECM detects battery voltage on the START input with the engine running. |
| • | The condition is present for 1.6 seconds. |
Action Taken When the DTC Sets
DTC P0512 is a C type DTC.
Conditions for Clearing the DTC
DTC P0512 is a C type DTC.
Reference Information
Schematic Reference
Starting and Charging Schematics
Connector End View Reference
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify DTC P0512 is set as current. Observe the scan tool ECM Crank Request Signal parameter. The reading should display NO.
| ⇒ | If the parameter displays Yes and the Ignition switch is not in start position , refer to Circuit/System Testing. |
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at the ECM
- Ignition ON, clutch fully depressed on manual transmission, test for less than 1 volt between the start switch signal circuit X1 terminal 96 and ground.
- If the circuit tests normal, test or replace the ECM.
| ⇒ | If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, test or replace the Ignition Switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
