Pinpoint Test A: The Cruise Control Is Inoperative

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

A1 VERIFY PCM CONFIGURATION
- Enter the following diagnostic mode on the scan tool: Programmable Parameters.
- Verify that the cruise control is enabled in the PCM.
- Is the cruise control enabled?
- Yes: GO to A2 .
- No: ENABLE the cruise control in the PCM using the scan tool programmable parameters menu. TEST the system for normal operation.
A2 CHECK FOR ABS DTCs
- Review the recorded DTCs from the ABS self-test.
- Are any DTCs recorded?
- Yes: REFER to DIAGNOSIS AND TESTING . REPAIR all ABS module DTCs and RETEST the cruise control.
- No: GO to A3 .
A3 CHECK FOR PCM DTCs
- Review the recorded DTCs from the PCM self-test.
- Are any non-cruise control DTCs recorded?
- Yes: REFER to the INTRODUCTION - GASOLINE MODELS . REPAIR all PCM DTCs and RETEST the cruise control.
- No: GO to A4 .
A4 CHECK THE VEHICLE SPEED
- Check for correct operation of the speedometer.
- Does the speedometer operate correctly?
- Yes: GO to A5 .
- No: REFER to PINPOINT TESTS to continue diagnosis of the speedometer.
A5 CHECK THE PARK BRAKE
- Monitor the park brake indicator while applying and releasing the park brake.
- Does the park brake operate correctly?
- Yes: GO to A6 .
- No: REFER to PINPOINT TESTS to continue diagnosis of the park brake indicator.

A6 CHECK THE STOPLAMP SWITCH (BOO1 AND BOO2) PIDs

Ignition ON.
Enter the following diagnostic mode on the scan tool: PCM DataLogger.

Monitor the PCM PIDs BOO1 (brake pedal top travel) and BOO2 (brake pedal bottom travel) while applying and releasing the brake pedal as follows:

BRAKE PEDAL POSITION REFERENCE CHART

Brake Pedal Position	BOO1 PID	BOO2 PID
Released	Off	Off
Applied lightly	On	Off
Applied firmly	On	On

Do the PID values agree with the brake pedal position?

Yes: If equipped with an automatic transaxle, GO to A8.
If equipped with a manual transaxle, GO to A7 .
No: GO to PINPOINT TEST B .

A7 CHECK THE CPP SWITCH (CPP_TOP) PID
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Monitor the PCM PID (CPP_TOP) while pressing and releasing the clutch pedal.
- Does the PID value agree with the clutch pedal position?
- Yes: GO to A8 .
- No: GO to PINPOINT TEST D .
A8 MONITOR THE TR PID
- 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 TR selector lever position?
- Yes: GO to A9 .
- No: REFER to DIAGNOSIS AND TESTING - 6F35 or DIAGNOSIS AND TESTING - eCVT to continue diagnosis of the digital TR sensor.

A9 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 cruise control switch PID (SCCS).

CRUISE CONTROL SWITCH REFERENCE CHART

Cruise Control Switch	SCCS PID Value
-	NONE Pressed
RESUME	RESUME
OFF	Off
ON	On
SET +	SET/+
SET -	SET/-

Does the PID value agree with the switch position?

Yes: GO to A10 .
No: If only one switch does not display the correct PID value, INSTALL a new cruise control switch. REFER to CRUISE CONTROL SWITCH . TEST the system for normal operation.
Otherwise, GO to PINPOINT TEST C .

A10 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the PCM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new PCM. REFER to POWERTRAIN CONTROL MODULE (PCM) 2.5L, POWERTRAIN CONTROL MODULE (PCM) 3.0L (4V) or POWERTRAIN CONTROL MODULE (PCM) Hybrid. 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.