Diagnostic Routine A

Diagnostic Routine A

Diagnostic Overview

The Cruise Control Is Inoperative

Refer to Wiring Diagram Set 31 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Steering Wheel Switches .

REFER to Cruise Control Operation .

Pinpoint Test

1. CHECK FOR DTCs (Diagnostic Trouble Codes)

1. Using a scan tool, perform self-test for:

- PCM (Powertrain Control Module)
- SASM (Steering Angle Sensor Module)
- ABS (Anti-Lock Brake System) module
- BCM (Body Control Module)

Are any DTCs (Diagnostic Trouble Codes) recorded?






2. CHECK THE STOPLAMP SWITCH (BOO1) AND CRUISE CONTROL DEACTIVATOR SWITCH (BOO2) PIDs (Parameter Identifications)

1. Using a scan tool, view PCM (Powertrain Control Module) PIDs (Parameter Identifications).

2. Using the table, monitor the PIDs (Parameter Identifications) BOO1 (stoplamp switch) and BOO2 (cruise control deactivator switch) while applying and releasing the brake pedal.





Do the PID (Parameter Identification) values agree with the brake pedal position?






3. CHECK THE CLUTCH PEDAL CRUISE CONTROL DEACTIVATOR SWITCH (CPP_TOP) PID (Parameter Identification)

1. Using a scan tool, view PCM (Powertrain Control Module) PIDs (Parameter Identifications).

2. Using the table, monitor the PCM (Powertrain Control Module) PID (Parameter Identification) CPP_TOP while pressing and releasing the clutch pedal.





Does the PID (Parameter Identification) value agree with the clutch pedal position?






4. CHECK THE CLUTCH PEDAL SWITCH (CPP_TOP) PID (Parameter Identification) WITH THE CLUTCH PEDAL CRUISE CONTROL DEACTIVATOR SWITCH DISCONNECTED

1. Ignition OFF.

2. Disconnect: Clutch Pedal Cruise Control Deactivator Switch.

3. Ignition ON.

4. Using a scan tool, view PCM (Powertrain Control Module) PIDs (Parameter Identifications).

5. Monitor the clutch switch PID (Parameter Identification) CPP_TOP.

Does the PID (Parameter Identification) read NO?






5. CHECK THE CRUISE CONTROL SWITCH (SCCS) PID (Parameter Identification)

1. Using a scan tool, view PCM (Powertrain Control Module) PIDs (Parameter Identifications).

2. Using the table, press each cruise control switch while monitoring the cruise control switch PID (Parameter Identification) (SCCS).





Does the PID (Parameter Identification) value agree with the switch position?






6. CHECK FOR CORRECT PCM (Powertrain Control Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect all PCM (Powertrain Control Module) connectors.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the PCM (Powertrain Control Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?