Pinpoint Test A: The Cruise Control Is Inoperative
Cruise Control
Pinpoint Tests
Pinpoint Test A: The Cruise Control Is Inoperative
Normal Operation
For all cruise control systems, a reference voltage is sent from the PCM to the steering wheel cruise control switches. When a switch is pressed, the voltage is routed through a specific resistor value for each function. The PCM provides ground for the reference voltage to determine which control input function has been selected. When the brake pedal is applied, the PCM deactivates the cruise control, if engaged.
On vehicles with the adaptive cruise control system, the Cruise-Control Module (C-CM) communicates with the Instrument Panel Cluster (IPC), Steering Angle Sensor Module (SASM), Head Up Display (HUD) module, Interior Lighting Control Module (ILCM), ABS module and PCM over the High Speed Controller Area Network (HS-CAN).
- DTC U0405 (Invalid Data Received From Cruise Control Module) - A continuous DTC that sets in the ABS module when the ABS module receives invalid data from the C-CM.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PCM not configured for cruise control
- Cruise control switch
- Digital Transmission Range (TR) sensor
- Vehicle speed signal
- PCM
- Stoplamp switch
- C-CM (with adaptive cruise control)
- ABS module (with adaptive cruise control)
- IPC (with adaptive cruise control)
PINPOINT TEST A: THE CRUISE CONTROL IS INOPERATIVE
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A1 VERIFY PCM CONFIGURATION
- Enter the following diagnostic mode on the scan tool: Programmable Parameters.
- For vehicles without adaptive cruise control, verify that the cruise control system is enabled in the PCM.
- For vehicles with adaptive cruise control, verify that the adaptive cruise control system is enabled in the PCM.
- Is the cruise control system enabled?
Yes
GO to A2.
No
ENABLE the cruise control system in the PCM using the scan tool programmable parameters menu. TEST the system for normal operation.
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A2 CHECK FOR PCM DTCs
- Review the recorded DTCs from the PCM self-test.
- Are any PCM DTCs recorded?
Yes
REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures
No
If the vehicle is equipped with adaptive cruise control, GO to A3.
Otherwise, GO to A8.
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A3 CHECK THE C-CM DTCs
- Review the recorded DTCs from the C-CM self-test.
- Are any C-CM DTCs recorded?
Yes
REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures
No
GO to A4.
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A4 CHECK THE MESSAGE CENTER FOR "CRUISE CONTROL NOT AVAILABLE" MESSAGE
- Start the engine.
- Press and release the cruise control ON/OFF switch while observing the message center display.
- Does the message center display "CRUISE NOT AVAILABLE" when pressing the ON/OFF Switch?
Yes
CARRY OUT the sensor alignment procedure. REFER to Cruise Control Module (C-CM) (with Sensor) Adjustment Adjustments.
If the concern is still present, GO to A13.
No
GO to A5.
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A5 CHECK THE ABS MODULE DTCs
- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Carry out the ABS module self-test.
- Are any ABS module DTCs recorded?
Yes
For DTC U0405, GO to A7.
For all other ABS module DTCs, REFER to Antilock Brakes / Traction Control Systems.
No
GO to A6.
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A6 CHECK FOR LOST COMMUNICATION DTCs
- Ignition ON.
- Clear continuous DTCs from all modules.
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds.
- Retrieve all continuous DTCs from all modules.
- Is DTC U0100:00, U0121:00, U0126:00, U0155:00, U0158:00 or U0180:00 set in the C-CM module?
Yes
REFER to DTC Charts. Diagnostic Trouble Code Tests and Associated Procedures
No
GO to A7.
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A7 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs
- Carry out the self-test for the C-CM.
- Is DTC U3003:16 or DTC U3003:17 recorded in the C-CM?
Yes
For DTC U3003:16, GO to Pinpoint Test Q. Pinpoint Test Q: DTC U3003:16
For DTC U3003:17, GO to Pinpoint Test R. Pinpoint Test R: DTC U3003:17
No
GO to A8.
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A8 CHECK THE VEHICLE SPEED SIGNAL
- Check for correct operation of the speedometer.
- Does the speedometer operate correctly?
Yes
GO to A9.
No
REFER to Instrument Panel, Gauges and Warning Indicators to continue diagnosis of the speedometer.
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A9 CHECK THE STOPLAMP SWITCH (BOO AND BPA) PIDs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Monitor the PCM PIDs BOO and BPA while applying and releasing the brake pedal as follows:
- Do the PID values agree with the brake pedal positions?
Yes
GO to A10.
No
GO to Pinpoint Test B. Pinpoint Test B: DTC P1703
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A10 CHECK THE CRUISE CONTROL SWITCH
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Press each cruise control switch button while monitoring the SCCS PID (cruise control switch).
- Does the PID value agree with the switch being pressed?
Yes
GO to A11.
No
If only one switch does not display the correct PID value, INSTALL a new steering wheel sub-assembly (3K519). REFER to Steering Column. TEST the system for normal operation.
Otherwise, GO to Pinpoint Test C. Pinpoint Test C: The Cruise Control Switch Is Inoperative/Does Not Operate Correctly
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A11 MONITOR THE PCM PID TR
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Monitor the PCM PID (TR).
- Select DRIVE.
- Does the PID value agree with the transmission range selector lever position?
Yes
GO to A12.
No
REFER to Automatic Transmission/Transaxle &/or Transmission Control Systems to continue diagnosis of the digital TR sensor.
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A12 CHECK FOR CORRECT PCM OPERATION
- Ignition OFF.
- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new PCM. REFER to Computers and Control Systems. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
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A13 CHECK FOR CORRECT C-CM OPERATION
- Disconnect the C-CM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the C-CM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new C-CM. REFER to Cruise-Control Module (C-CM) Service and Repair. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. REPEAT the self-test.
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