Diagnostic Routine C
Diagnostic Routine C
Diagnostic Overview
The Cruise Control Switch Is Inoperative Or Does Not Operate Correctly
Refer to Wiring Diagram Set 31 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
REFER to Steering Wheel Switch Function .
Pinpoint Test
1. CHECK THE CRUISE CONTROL SWITCH PID (Parameter Identification) (SCCS) IN THE PCM (Powertrain Control Module)
1. Ignition ON.
2. Using a scan tool, view PCM (Powertrain Control Module) PIDs (Parameter Identifications).
3. 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?
2. CHECK THE HS-CAN (High Speed Controller Area Network) COMMUNICATION NETWORK
1. Ignition ON.
2. Using a scan tool, perform the network test.
Does the SASM (Steering Angle Sensor Module) pass the network test?
3. CHECK THE LIN (Local Interconnect Network) 1 COMMUNICATION NETWORK
1. Ignition ON.
2. Verify turn signal functionality.
Do the turn signals function correctly?
4. CHECK FOR VOLTAGE TO THE CRUISE CONTROL SWITCHES
1. WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
Turn the ignition OFF and wait one minute.
2. Remove the driver air bag module. REFER to Driver Air Bag Module. Driver Air Bag Module
3. Disconnect: LH (Left Hand) Lower Steering Wheel Switch.
4. Ignition ON.
5. Measure:
Is the voltage approximately 5 volts?
5. CHECK THE STEERING WHEEL SWITCH HARNESS FOR AN OPEN
1. Ignition OFF.
2. Disconnect: Clockspring C218B.
3. Measure:
Are the resistances less than 3 ohms?
6. CHECK THE STEERING WHEEL SWITCH CIRCUITS THROUGH THE CLOCKSPRING FOR AN OPEN
1. Measure:
2. Measure:
Are the resistances less than 3 ohms?
7. CHECK FOR CORRECT SASM (Steering Angle Sensor Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all the SASM (Steering Angle Sensor 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 SASM (Steering Angle Sensor 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?
8. RECHECK THE PCM (Powertrain Control Module) DTCs (Diagnostic Trouble Codes)
NOTE: If new modules were installed prior to the DTC (Diagnostic Trouble Code) being set, the module configuration may be incorrectly set during the PMI (Programmable Module Installation) or the PMI (Programmable Module Installation) may not have been carried out.
1. Clear the DTCs (Diagnostic Trouble Codes). Repeat the PCM (Powertrain Control Module) self-test.
Are any PCM (Powertrain Control Module) DTCs (Diagnostic Trouble Codes) recorded?
9. 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?
