Pinpoint Test A: The Cruise Control Is Inoperative
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE:
Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY DISCONNECT
.
- 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 PCM DTCs
- Review the recorded DTCs from the PCM self-test.
- Are any non-cruise control DTCs recorded?
- Yes: REFER to INTRODUCTION - GASOLINE MODELS or INTRODUCTION - HYBRID . REPAIR all PCM DTCs and RETEST the cruise control.
- No: GO to A3.
- A3 CHECK FOR ABS DTCs
- Review the recorded DTCs from the ABS self-test.
- Are any DTCs recorded?
- Yes: REFER to ANTI-LOCK CONTROL -- NON-HYBRID . REPAIR all ABS DTCs and RETEST the cruise control system for normal operation.
- No: GO to A4.
- A4 CHECK THE VEHICLE SPEED
- Check for correct operation of the speedometer.
- Does the speedometer operate correctly?
- Yes: For 3.5L engines, go to A6. Otherwise, go to A5.
- No: REFER to PINPOINT TEST F: THE SPEEDOMETER IS INOPERATIVE to diagnose the speedometer.
- A5 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:STOPLAMP SWITCH POSITIONS TABLE
Brake Pedal Position BOO1 PID BOO2 PID Released Off Off Applied firmly On On - Do the PID values agree with the brake pedal positions?
- Yes:
If equipped with an automatic transaxle, go to A9.
If equipped with a manual transaxle, go to A7.
- No: Go To PINPOINT TEST B .
- A6 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 (brake pedal top travel) and BPA (brake pedal bottom travel) while applying and releasing the brake pedal as follows:STOPLAMP SWITCH POSITIONS TABLE
Brake Pedal Position BOO PID BPA PID Released Off Off Applied firmly On On - Do the PID values agree with the brake pedal positions?
- Yes: Go to A8.
- No: Go to PINPOINT TEST B .
- A7 CHECK THE CLUTCH PEDAL CRUISE CONTROL DEACTIVATOR 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 read NO with the clutch pedal released and YES with the clutch pedal applied?
- A8 MONITOR THE TCM TR PID
- Enter the following diagnostic mode on the scan tool: TCM DataLogger.
- Monitor the TCM PID (TR).
- Select DRIVE.
- Does the PID value agree with the TR selector lever position?
- Yes: Go to A10.
- No: REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - AISIN AW21 to continue diagnosis of the digital TR sensor.
- A9 MONITOR THE PCM 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 A10.
- No: REFER to DIAGNOSIS AND TESTING or AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) to continue diagnosis of the digital TR sensor.
- A10 CHECK THE CRUISE CONTROL SWITCH
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Press each cruise control switch while monitoring the cruise control switch PID (SCCS).CRUISE CONTROL SWITCH POSITIONS TABLE
Cruise Control Switch SCCS PID Value - NONE Pressed RESUME (non-hybrid) RESUME RSM (hybrid) RESUME CNCL RSM (late build) RESUME OFF Off ON On ON OFF (late build) On/Off SET + SET/+ SET - SET/- - Does the PID value agree with the switch position?
- Yes: GO to A13.
- No:
If only one switch does not display the correct PID value, INSTALL a new cruise control switch. REFER to Removal and Installation . TEST the system for normal operation.
Otherwise, go to PINPOINT TEST C .
- A11 CHECK THE CLUTCH PEDAL CRUISE CONTROL DEACTIVATOR SWITCH GROUND CIRCUIT FOR AN OPEN
- Disconnect: Clutch Pedal Cruise Control Deactivator Switch C2070.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the clutch pedal cruise control deactivator switch C2070-5, circuit GD120 (BK/GN), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes: GO to A12.
- No: REPAIR the circuit. TEST the system for normal operation.
- A12 CHECK THE CLUTCH PEDAL CRUISE CONTROL DEACTIVATOR SWITCH CIRCUIT FOR AN OPEN
- Disconnect: PCM C175t.
- Measure the resistance between the PCM C175t-27, circuit CE904 (GN/VT), harness side and the clutch pedal cruise control deactivator switch C2070-4, circuit CE904 (GN/VT), harness side.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new clutch pedal cruise control deactivator switch. REFER to Removal and Installation . TEST the system for normal operation.
- No: REPAIR the circuit. TEST the system for normal operation.
- A13 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 INSTALLATION 2.5L , INSTALLATION 3.0L (4V) or INSTALLATION 3.5L . 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.