FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 2012 >> Focus L4-2.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Pinpoint Tests >> Diagnostic Routine AE

Diagnostic Routine AE




Diagnostic Routine AE

Diagnostic Overview

No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding

Refer to Wiring Diagram Set 14 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Medium Speed Controller Area Network (MS-CAN) .

REFER to Controller Area Network (CAN) Fault Tolerance .

Pinpoint Test

1. CHECK THE DLC (Data Link Connector) PINS FOR DAMAGE

1. Ignition OFF.

2. Disconnect the scan tool cable from the DLC (Data Link Connector).

3. Inspect the DLC (Data Link Connector) pins 3 and 11 for damage.





Are DLC (Data Link Connector) pins 3 and 11 OK?






2. CHECK THE MS-CAN (Medium Speed Controller Area Network) TERMINATION RESISTANCE

1. Measure:





Is the resistance between 54 and 66 ohms?






3. CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND

1. Measure:





Are the resistances greater than 1,000 ohms?






4. CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO VOLTAGE

1. Ignition ON.

2. Measure:





Are the voltages greater than 6 volts?






5. CHECK THE MS-CAN (Medium Speed Controller Area Network) TERMINATION RESISTOR

1. Measure:





Is the resistance between 108 and 132 ohms?






6. CHECK THE MS-CAN (Medium Speed Controller Area Network) TERMINATION RESISTOR WITH THE BCM (Body Control Module) DISCONNECTED

1. Disconnect: BCM (Body Control Module) C2280A.

2. Measure:





Is the resistance between 108 and 132 ohms?






7. CHECK THE MS-CAN (Medium Speed Controller Area Network) CIRCUITS BETWEEN THE BCM (Body Control Module) AND THE DLC (Data Link Connector) FOR AN OPEN

1. Measure:





Are the resistances less than 3 ohms?






8. CHECK THE MS-CAN (Medium Speed Controller Area Network) CIRCUITS BETWEEN THE IPC (Instrument Panel Cluster) AND THE DLC (Data Link Connector) FOR AN OPEN

1. Disconnect: IPC (Instrument Panel Cluster).

2. Measure:





Are the resistances less than 3 ohms?






9. CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TOGETHER

1. Measure:





Is the resistance less than 3 ohms?






10. CHECK THE MS-CAN (Medium Speed Controller Area Network) CIRCUITS BETWEEN THE BCM (Body Control Module) AND THE DLC (Data Link Connector) FOR AN OPEN

1. Measure:





Is the resistance greater than 10,000 ohms?






11. CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TOGETHER

1. Measure:





2. Disconnect modules one at a time until the resistance is greater than 5 ohms.

- APIM (Accessory Protocol Interface Module) (if equipped)
- BCM (Body Control Module) C2280A
- DDM (Driver Door Module) C501B (if equipped)
- GPSM (Global Positioning System Module) (if equipped)
- IPM-B (Image Processing Module - B) (if equipped)
- IPC (Instrument Panel Cluster)
- PDM (Passenger Door Module) C652B (if equipped)
- RFA (Remote Function Actuator) module C4392D (if equipped)
- HVAC (Heating, Ventilation, and Air Conditioning) module C228B

Did the resistance change to greater than 5 ohms with one of the modules disconnected?






12. CHECK THE MS-CAN (Medium Speed Controller Area Network) (+) AND MS-CAN (Medium Speed Controller Area Network) (-) CIRCUITS FOR A SHORT TO GROUND WITH THE MODULES DISCONNECTED

1. Measure





2. Disconnect modules one at a time until the resistance to ground is greater than 1,000 ohms.

- APIM (Accessory Protocol Interface Module) (if equipped)
- BCM (Body Control Module) C2280A
- DDM (Driver Door Module) C501B (if equipped)
- GPSM (Global Positioning System Module) (if equipped)
- IPM-B (Image Processing Module - B) (if equipped)
- IPC (Instrument Panel Cluster)
- PDM (Passenger Door Module) C652B (if equipped)
- RFA (Remote Function Actuator) module C4392D (if equipped)
- HVAC (Heating, Ventilation, and Air Conditioning) module C228B

Did the resistance change to greater than 1,000 ohms with one of the modules disconnected?






13. CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IPC (Instrument Panel Cluster), HVAC (Heating, Ventilation, and Air Conditioning) MODULE, DDM (Driver Door Module), AND THE PDM (Passenger Door Module) DISABLED

NOTE: When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.

1. Disable modules one at a time until other MS-CAN (Medium Speed Controller Area Network) modules pass the network test. Skip to the end once network operation is restored.

2. Disconnect: BCM (Body Control Module) fuse 69 (5A) to disable the IPC (Instrument Panel Cluster).

3. Using a scan tool, perform the network test.

4. Install the removed fuses.

5. Disconnect: BCM (Body Control Module) fuse 73 (5A) to disable the HVAC (Heating, Ventilation, and Air Conditioning) module (if equipped).

6. Using a scan tool, perform the network test.

7. Install the removed fuses.

8. Disconnect: BCM (Body Control Module) fuses 4 (25A) to disable the DDM (Driver Door Module) (if equipped).

9. Using a scan tool, perform the network test.

10. Install the removed fuse.

11. Disconnect: BCM (Body Control Module) fuse 5 (25A) to disable the PDM (Passenger Door Module) (if equipped).

12. Using a scan tool, perform the network test.

Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?






14. VERIFY VEHICLE EQUIPMENT- APIM (Accessory Protocol Interface Module) AND GPSM (Global Positioning System Module)

1. Inspect the vehicle for an APIM (Accessory Protocol Interface Module) or GPSM (Global Positioning System Module).

Is the vehicle equipped with an APIM (Accessory Protocol Interface Module) or GPSM (Global Positioning System Module)?






15. CHECK FOR RESTORED COMMUNICATION WITH THE GPSM (Global Positioning System Module) AND THE APIM (Accessory Protocol Interface Module) DISABLED

NOTE: When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.

1. Disconnect: BCM (Body Control Module) fuse 67 (7.5A) to disable the GPSM (Global Positioning System Module) and APIM (Accessory Protocol Interface Module).

2. Using a scan tool, perform the network test.

Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?






16. CHECK FOR RESTORED COMMUNICATION WITH THE GPSM (Global Positioning System Module) DISCONNECTED

NOTE: When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.

1. Disconnect: GPSM (Global Positioning System Module) (if equipped).

2. Using a scan tool, perform the network test.

Do all other MS-CAN (Medium Speed Controller Area Network) modules pass the network test?






17. VERIFY VEHICLE EQUIPMENT- RFA (Remote Function Actuator) MODULE

1. Inspect the vehicle for an RFA (Remote Function Actuator) module.

Is the vehicle equipped with an RFA (Remote Function Actuator) module?






18. CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RFA (Remote Function Actuator) MODULE DISABLED

NOTE: When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.

1. Disconnect: RJB (Rear Junction Box) Fuse 2 (10A) to disable the RFA (Remote Function Actuator) module (if equipped).

2. Using a scan tool, perform the network test.

Do all other modules pass the network test?






19. VERIFY VEHICLE EQUIPMENT- IPM-B (Image Processing Module - B)

1. Inspect the vehicle for an IPM-B (Image Processing Module - B).

Is the vehicle equipped with an IPM-B (Image Processing Module - B)?






20. CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IPM-B (Image Processing Module - B) DISABLED

NOTE: When re-running the network test, close the network test application first or the screen display reverts back to the prior network test results.

1. Disconnect: RJB (Rear Junction Box) Fuse 29 (5A) to disable the IPM-B (Image Processing Module - B) (if equipped).

2. Using a scan tool, perform the network test.

Do all other modules pass the network test?






21. CHECK THE APIM (Accessory Protocol Interface Module) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect the APIM (Accessory Protocol Interface Module) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the APIM (Accessory Protocol Interface Module) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






22. CHECK THE BCM (Body Control Module) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect all the BCM (Body Control Module) connectors.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the BCM (Body Control Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






23. CHECK THE DDM (Driver Door Module) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect all the DDM (Driver Door Module) connectors.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the DDM (Driver Door Module) connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






24. CHECK THE GPSM (Global Positioning System Module) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect the GPSM (Global Positioning System Module) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the GPSM (Global Positioning System Module) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






25. CHECK THE HVAC (Heating, Ventilation, and Air Conditioning) MODULE FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect all the HVAC (Heating, Ventilation, and Air Conditioning) module connectors.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the HVAC (Heating, Ventilation, and Air Conditioning) module connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






26. CHECK THE IPM-B (Image Processing Module - B) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect the IPM-B (Image Processing Module - B) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the IPM-B (Image Processing Module - B) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






27. CHECK THE IPC (Instrument Panel Cluster) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect the IPC (Instrument Panel Cluster) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the IPC (Instrument Panel Cluster) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






28. CHECK THE PDM (Passenger Door Module) FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect the PDM (Passenger Door Module) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the PDM (Passenger Door Module) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?






29. CHECK THE RFA (Remote Function Actuator) MODULE FOR CORRECT OPERATION

1. Ignition OFF.

2. Disconnect and inspect all the RFA (Remote Function Actuator) module connectors.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the RFA (Remote Function Actuator) module connectors. Make sure they seat and latch correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?





pro multis Credits:Operation CHARM About Operation CHARM