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Home >> Ford >> 2011 >> Fiesta L4-1.6L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatically Shifted Manual Transmission/Transaxle >> Testing and Inspection >> Pinpoint Tests >> Automatic Shifting Manual Transmission/Transaxle >> Pinpoint Test A: Clutch Motors

Pinpoint Test A: Clutch Motors




Pinpoint Tests





Any time an electrical connector is disconnected, inspect the connector for terminal condition, corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or install new as necessary.

Pinpoint Tests

Refer to Wiring Diagrams for schematic and connector information. Diagrams By Number

PINPOINT TEST A: CLUTCH MOTORS

NOTE: Refer to the transaxle connector illustrations Transaxle Connector Layouts Transaxle Connector Layouts.

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A1 TEST BJB FUSE 2 (50A)

- Check fuse: Battery Junction Box (BJB) fuse 2 (50A).
- Is the resistance less than 5 ohms?

Yes
GO to A2.

No
REPAIR circuit SBB02 (YE/RD) for a short to ground. INSTALL a new fuse. TEST the system for normal operation.

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A2 TEST BJB FUSE 27 (7.5A)

- Check fuse: BJB fuse 27 (7.5A).
- Is the resistance less than 5 ohms?

Yes
GO to A3.

No
REPAIR circuit SBB27 (BU/RD) for a short to ground. INSTALL a new fuse. TEST the system for normal operation.

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A3 TEST CJB FUSE 23 (10A)

- Check fuse: Central Junction Box (CJB) fuse 23 (10A).
- Is the resistance less than 5 ohms?

Yes
GO to A4.

No
REPAIR circuit CBP23 (BN/YE) for a short to ground. INSTALL a new fuse. TEST the system for normal operation.

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A4 CHECK FOR VOLTAGE AT THE TCM CONNECTOR

- Ignition OFF.
- Disconnect: Transmission Control Module (TCM) C1750A.
- Inspect both ends of the connector for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- Measure the voltage between TCM C1750A-1, circuit SBB02 (YE/RD) harness side and ground.




- Measure the voltage between TCM C1750A-2, circuit SBB02 (YE/RD) harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A5.

No
REPAIR circuit SBB02 (YE/RD) for an open. RECONNECT all components. TEST the system for normal operation.

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A5 CHECK FOR KAM VOLTAGE AT THE TCM CONNECTOR

- Measure the voltage between TCM C1750A-18, circuit SBB27 (BU/RD) harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A6.

No
REPAIR circuit SBB27 (BU/RD) for an open. RECONNECT all components. TEST the system for normal operation.

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A6 CHECK FOR IGNITION POWER AT THE TCM CONNECTOR

- Ignition ON.
- Measure the voltage between TCM C1750A-31, circuit CBP23 (BN/YE) harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A7.

No
REPAIR circuit CBP23 (BN/YE) for an open. RECONNECT all components. TEST the system for normal operation.

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A7 CHECK THE TRANSAXLE WIRING HARNESS FOR AN OPEN CIRCUIT

- Ignition OFF.
- Disconnect: TCM C1750B.
- Inspect both ends of the connector for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- Disconnect: Clutch Motor 1 C1633.
- Inspect both ends of the connector for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- Disconnect: Clutch Motor 2 C1634.
- Inspect both ends of the connector for damage or pushed-out pins, corrosion, loose wires and missing or damaged seals.
- If diagnosing a clutch motor 1 concern, measure the resistance between TCM C1750B, harness side and clutch motor 1 C1633, using the following chart.





- If diagnosing a clutch motor 2 concern, measure the resistance between TCM C1750B, harness side and clutch motor 2 C1634, using the following chart.





- Is the resistance less than 5 ohms?

Yes
GO to A8.

No
REPAIR the circuit(s) for an open. RECONNECT all components. TEST the system for normal operation.

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A8 CHECK THE TRANSAXLE WIRING HARNESS FOR A SHORT TO GROUND

- If diagnosing a clutch motor 1 concern, measure the resistance between TCM C1750B, harness side and ground using the following chart.





- If diagnosing a clutch motor 2 concern, measure the resistance between TCM C1750B, harness side and ground using the following chart.





- Is the resistance greater than 10,000 ohms?

Yes
Inspect the transaxle wiring harness for signs of physical damage and repair or install a new transaxle wiring harness as necessary. TEST the system for normal operation. If the transaxle wiring harness is not damaged, GO to A9.

No
REPAIR the circuit(s) for a short to ground. RECONNECT all components. TEST the system for normal operation.

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A9 CHECK THE CLUTCH MOTOR

- Remove both clutch motors. Install clutch motor 1 in the original clutch motor 2 location and install clutch motor 2 in the original clutch motor 1 location. RECONNECT all components. Clear the DTC's and TEST the system for normal operation.
- Does the TCM set the same DTC?

Yes
INSTALL a new TCM.

No
INSTALL a new clutch motor. TEST the system for normal operation.

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