Speed Control: Diagnosis Ford Fusion I рестайлинг

Inspection and Verification

1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage. VISUAL INSPECTION CHART Mechanical Electrical Throttle body Battery junction box (BJB) fuse 49 (15A) Wiring, terminals or connectors Speed control switch Clutch pedal speed control deactivator switch (manual transaxle) Digital transmission range (TR) sensor (automatic transaxle) Speed control deactivator switch (part of the stoplamp switch) Stoplamp switch PCM
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. Verify the speedometer operates correctly without speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-291880) article.
5. Verify the stoplamp operate correctly with the ignition switch in the ON position. If the stoplamp do not operate correctly, refer to «EXTERIOR LIGHTING»(ref-291872) article.
6. Verify the parking brake warning indicator is operating correctly. If the parking brake warning indicator does not operate correctly, refer to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-291880) article.
7. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
8. If the scan tool does not communicate with the VCM: Check the VCM connection to the vehicle. Check the scan tool connection to the VCM. Refer to «MODULE COMMUNICATIONS NETWORK»(ref-291879) article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
9. If the scan tool does not communicate with the vehicle: Verify the ignition key is in the ON position. Verify the scan tool operation with a known good vehicle. Refer to «MODULE COMMUNICATIONS NETWORK»(ref-291879) article to diagnose no response from the PCM.
10. Carry out the network test. If the scan tool responds with no communication for one or more modules, refer to «MODULE COMMUNICATIONS NETWORK»(ref-291879) article. If the network test passes, retrieve and record the continuous memory DTCs.
11. Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.
12. If the DTCs retrieved are related to the concern, go to DTC Charts. For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(ref-291878) article.
13. If no DTCs related to the concern are retrieved, go to «Symptom Chart»(ref-291942-S24303384282008073000000) .

DTC Charts

PCM DTC CHART

Symptom Chart

Symptom Chart

Refer to SYSTEM WIRING DIAGRAMS article for Fusion, SYSTEM WIRING DIAGRAMS article for Milan or SYSTEM WIRING DIAGRAMS article for MKZ, Speed Control for schematic and connector information.

Pinpoint Test B: DTC P1572 or P1703 - Brake On/Off Circuit Failure

Refer to SYSTEM WIRING DIAGRAMS article for Fusion, SYSTEM WIRING DIAGRAMS article for Milan or SYSTEM WIRING DIAGRAMS article for MKZ, Speed Control for schematic and connector information.

PINPOINT TEST B: DTC P1572 OR DTC P1703 - BRAKE ON/OFF CIRCUIT FAILURE

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1. B1 CHECK THE OPERATION OF THE STOPLAMP Key in ON position. Operate the stoplamp. Do the stoplamp operate correctly? YES : Go to B2 . NO : REFER to «EXTERIOR LIGHTING»(ref-291872) article to continue diagnosis of the stoplamp.
2. B2 CHECK CIRCUIT CCB08 (VT/WH) FOR VOLTAGE Key in OFF position. Disconnect: PCM C175b Key in ON position. While applying the brake pedal, measure the voltage between the PCM C175b-46, circuit CCB08 (VT/WH), harness side and ground. Is the voltage greater than 10 volts with the brake pedal applied? YES : Go to B3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
3. B3 CHECK THE SPEED CONTROL DEACTIVATOR SWITCH FOR CORRECT OPERATION While firmly applying and releasing the brake pedal, measure the voltage between the PCM C175b-47, circuit CES09 (VT/OG), harness side and ground. Is the voltage greater than 10 volts with the brake pedal released and 0 volts with the brake pedal firmly applied? YES : Go to B9 . NO : Go to B4 .
4. B4 CHECK CIRCUIT CBP49 (VT/GY) FOR AN OPEN Key in OFF position. Disconnect: Stoplamp Switch C278 Key in ON position. Measure the voltage between the stoplamp switch C278-2, circuit CBP49 (VT/GY), harness side and ground. Is the voltage greater than 10 volts? YES : Go to B5 . NO : VERIFY the battery junction box (BJB) fuse 49 (15A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
5. B5 CHECK CIRCUIT CES09 (VT/OG) FOR A SHORT TO VOLTAGE Measure the voltage between the stoplamp switch C278-3, circuit CES09 (VT/OG), harness side and ground. Is any voltage present? YES : Go to B6 . NO : Go to B7 .
6. B6 CHECK THE ABS MODULE FOR A SHORT TO VOLTAGE Key in OFF position. Disconnect: ABS Module C135 Key in ON position. Measure the voltage between the stoplamp switch C278-3, circuit CES09 (VT/OG), harness side and ground. Is any voltage present? YES : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. NO : Go to B8 .
7. B7 CHECK CIRCUIT CES09 (VT/OG) FOR AN OPEN Key in OFF position. Measure the resistance between the stoplamp switch C278-3, circuit CES09 (VT/OG), harness side and the PCM C175b-47, circuit CES09 (VT/OG), harness side. Is the resistance less than 5 ohms? YES : INSTALL a new stoplamp switch. REFER to «EXTERIOR LIGHTING»(ref-291872) article. CLEAR the DTCs. REPEAT the self-test. NO : Go to B9 .
8. B8 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect all the ABS module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the ABS module 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 ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-291936) article. CLEAR the DTCs. REPEAT the self-test. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
9. B9 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 «ELECTRONIC ENGINE CONTROLS - 2.3L»(ref-291907) article or «ELECTRONIC ENGINE CONTROLS - 3.0L (4V)»(ref-291913) article. 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.

Refer to SYSTEM WIRING DIAGRAMS article for Fusion, SYSTEM WIRING DIAGRAMS article for Milan or SYSTEM WIRING DIAGRAMS article for MKZ, Speed Control for schematic and connector information.

Pinpoint Test D: DTC P0833 - Clutch Pedal Switch B Circuit

Refer to SYSTEM WIRING DIAGRAMS article for Fusion, SYSTEM WIRING DIAGRAMS article for Milan or SYSTEM WIRING DIAGRAMS article for MKZ, Speed Control for schematic and connector information.

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1. D1 CHECK THE CPP SWITCH (CPP_TT) PID Key in ON position. Enter the following diagnostic mode on the diagnostic tool: PCM DataLogger Monitor the PCM CPP_TT PID while pressing and releasing the clutch pedal. Does the PID value agree with the clutch pedal position? YES : Go to D4 . NO : Go to D2 .
2. D2 CHECK THE CLUTCH PEDAL SPEED CONTROL DEACTIVATOR SWITCH Key in OFF position. Disconnect: Clutch Pedal Speed Control Deactivator Switch C2354 Measure the resistance between the clutch pedal speed control deactivator switch C2354 pin 4, component side and the clutch pedal speed control deactivator switch C2354 pin 5, component side. Is the resistance less than 5 ohms with the clutch pedal released? YES : Go to D3 . NO : INSTALL a new clutch pedal speed control deactivator switch. CLEAR the DTCs. REPEAT the self-test.
3. D3 CHECK CIRCUIT CE904 (GN/VT) FOR AN OPEN Disconnect: PCM C175b Measure the resistance between the clutch pedal speed control deactivator switch C2354-4, circuit CE904 (GN/VT), harness side and the PCM C175b-17, circuit CE904 (GN/VT), harness side. Is the resistance less than 5 ohms? YES : Go to D4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
4. D4 CHECK CIRCUIT RE407 (YE/VT) FOR AN OPEN Measure the resistance between the clutch pedal speed control deactivator switch C2354-5, circuit RE407 (YE/VT), harness side and the PCM C175b-58, circuit RE407 (YE/VT), harness side. Is the resistance less than 5 ohms? YES : Go to D5 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
5. D5 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 «ELECTRONIC ENGINE CONTROLS - 2.3L»(ref-291907) article or «ELECTRONIC ENGINE CONTROLS - 3.0L (4V)»(ref-291913) article. 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.

Note. Fusion shown, Milan similar.

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