Circuit Description
The clutch switch is a normally closed switch (clutch pedal released). The PCM detects an ignition voltage on the clutch switch circuit when the clutch switch is closed. The PCM detects 0 volts on the clutch switch circuit when the clutch switch is open (clutch pedal depressed).
This DTC determines if the Transmission Clutch switch has failed by looking for a clutch switch transition during a predetermined drive cycle.
Conditions for Running the DTC
No VSS DTCs.
Conditions for Setting the DTC
| • | The vehicle speed goes from 0 mph to greater than 24 mph and back to 0 mph for 2 seconds without the PCM detecting a clutch transition. |
| • | This must occur 7 times before the diagnostic reports a fault. |
Action Taken When the DTC Sets
| • | The powertrain control module (PCM) stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | A last test failed (current DTC) clears when the diagnostic runs and does not fail. |
| • | A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures. |
| • | Use a scan tool in order to clear the MIL/DTC. |
Diagnostic Aids
Important:
• Remove any debris from the PCM\TAC module connector surfaces before
servicing the PCM\TAC module. Inspect the PCM\TAC module connector gaskets
when diagnosing/replacing the modules. Ensure that the gaskets are installed
correctly. The gaskets prevent contaminate intrusion into the PCM\TAC
modules. • For any test that requires probing the PCM or a component
harness connector, use the Connector Test Adapter Kit J 35616
. Using this kit prevents damage
to the harness/component terminals. Refer to
Using Connector Test Adapters
in Wiring Systems.
| • | The following may cause an intermittent: |
| - | Poor connections; Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. |
| - | Corrosion |
| - | Mis-routed harness |
| - | Rubbed through wire insulation |
| - | Broken wire inside the insulation |
| • | For Clutch Switch adjustment refer to Clutch Pedal Position Switch Replacement in Clutch. |
| • | Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed. |
| • | For an intermittent, refer to Symptoms . |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step
| Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
Does the scan tool display change states when the clutch is depressed and released? | -- | Go to Diagnostic Aids | ||
3 | Inspect the adjustment of the clutch switch. Refer to Cruise Control Release Switch Replacement in Cruise Control. Was an adjustment necessary? | -- | ||
4 |
Does the scan tool display the Clutch Switch Released? | -- | ||
5 | Remove the jumper. Does the scan tool display the Clutch Switch Depressed? | -- | ||
6 | Probe the clutch switch ignition feed circuit with a test lamp connected to a ground. Is the test lamp illuminated? | -- | ||
7 | Test for a short to B+ on the clutch switch signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you find the condition? | -- | ||
8 | Inspect for poor terminal contact for the clutch switch signal circuit at the clutch switch connector. Refer to Wiring Repairs in Wiring Systems. Did you find the condition? | -- | ||
9 | Test for an open in the clutch switch signal circuit. Refer to Wiring Repairs in Wiring Systems. Did you find the condition? | -- | ||
10 | Repair the open in the clutch switch ignition feed circuit. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |
11 | Replace the clutch switch. Is the action complete? | -- | -- | |
12 | Inspect the terminal tension at the PCM connector for the clutch switch signal circuit. Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. Did you find the condition? | -- | ||
13 | Repair as necessary. Is the action complete? | -- | -- | |
14 |
Important:: Program the replacement PCM. Refer to Powertrain Control Module/Throttle Actuator Control Module Replacement . Replace the PCM. Is the action complete? | -- | -- | |
15 |
Does the scan tool indicate that this test ran and passed? | -- | ||
16 | Select the Capture Info option and the Review Info option using the scan tool. Are any DTCs displayed that you have not diagnosed? | -- | Go to Applicable DTC Table | System OK |
