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. |
Typical Scan Tool Data
Display Parameters | Normal Range | Short to Ground | Open/High Resistance | Short to Voltage |
|---|---|---|---|---|
Operating Conditions: Ignition ON, clutch pedal released. | ||||
Clutch Pedal Safety Switch | Applied/Released | Applied | Released | -- |
Circuit/System Description
The clutch safety switch is a normally open switch. When the ignition is ON, the engine control module (ECM) supplies B+ on the signal circuit to the clutch safety switch. A wire from the clutch safety switch to chassis ground completes the electrical circuit. The ECM senses B+ on the signal circuit with the clutch pedal released, and zero volts with the clutch pedal depressed.
Diagnostic Aids
This test procedure requires that the battery is completely charged. Refer to Battery Inspection/Test.
Reference Information
Schematic Reference
Manual Transmission Schematics
Connector End View Reference
Manual Transmission Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
- Start the engine, with the clutch pedal depressed. The engine should start and run.
- Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Circuit/System Testing
- Ignition OFF, disconnect the clutch safety switch harness connector.
- Test for less than 5 ohms between the clutch safety switch harness connector terminal B and the negative battery post.
- Ignition ON, test for 11-13 V on the clutch safety switch harness connector terminal A and ground.
- If all circuits test normal, replace the clutch safety switch.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If not within the specified range, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace the ECM. |
Component Testing
- Ignition OFF, disconnect the clutch safety switch harness connector.
- Test for less than 5 ohms between terminals A and B on the clutch safety switch.
| ⇒ | If greater than the specified value, replace the clutch safety switch. |
Repair Verifications
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
