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Home >> Ford >> 2010 >> Taurus AWD V6-3.5L Turbo >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test AD: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding >> Part 3

Part 3




Communications Network


Pinpoint Tests

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

Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number

Normal Operation

The Medium Speed Controller Area Network (MS-CAN) uses an unshielded twisted pair cable.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Accessory Protocol Interface Module (APIM) (if equipped)
- Audio Control Module (ACM)
- Audio Digital Signal Processing (DSP) module (if equipped)
- Driver Door Module (DDM) (if equipped)
- Driver Seat Module (DSM) (if equipped)
- Dual Climate Controlled Seat Module (DCSM) (if equipped)
- Front Controls Interface Module (FCIM)
- Front Display Interface Module (FDIM)
- Global Positioning System Module (GPSM) (if equipped)
- Headlamp Control Module 2 (HCM-2) (if equipped)
- HVAC module (if equipped)
- Interior Lighting Control Module (ILCM) (if equipped)
- Instrument Panel Cluster (IPC) (gateway module)
- Remote Function Actuator (RFA) module (if equipped)
- Smart Junction Box (SJB)
- Side Obstacle Detection Control Module - Left (SOD-L) (if equipped)
- Side Obstacle Detection Control Module - Right (SOD-R) (if equipped)



PINPOINT TEST AD: NO MS-CAN COMMUNICATION, ALL MODULES ARE NOT RESPONDING

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection and Verification

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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AD37 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE AUDIO DSP MODULE DISCONNECTED


- Disconnect: Audio DSP Module C4326a .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD60.

No
GO to AD38.

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AD38 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE FCIM DISCONNECTED


- Disconnect: Front Controls Interface Module (FCIM) C2402 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD61.

No
If the vehicle is equipped with a Front Display Interface Module (FDIM), GO to AD39.

If the vehicle is not equipped with an FDIM, GO to AD40.

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AD39 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE FDIM DISCONNECTED


- Disconnect: FDIM C2123 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD62.

No
GO to AD40.

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AD40 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE HVAC MODULE DISCONNECTED


- Disconnect: HVAC Module C2357 (Manual), C228a (Dual Automatic Temperature Control (DATC)) .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD63.

No
If the vehicle is equipped with a Global Positioning System Module (GPSM), GO to AD41.

If the vehicle is not equipped with a GPSM, GO to AD42.

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AD41 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE GPSM DISCONNECTED


- Disconnect: GPSM C2398 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD64.

No
GO to AD42.

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AD42 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IPC DISCONNECTED


- Disconnect: Instrument Panel Cluster (IPC) C220 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD65.

No
If the vehicle is equipped with an Interior Lighting Control Module (ILCM), GO to AD43.

If the vehicle is not equipped with an ILCM, GO to AD44.

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AD43 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ILCM DISCONNECTED


- Disconnect: ILCM C2392 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD66.

No
GO to AD44.

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AD44 VERIFY VEHICLE EQUIPMENT - DSM


- Verify whether the vehicle is equipped with a Driver Seat Module (DSM).
- Is the vehicle equipped with a DSM?

Yes
GO to AD45.

No
GO to AD46.

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AD45 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE DSM DISCONNECTED


- Disconnect: DSM C341d .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD67.

No
GO to AD46.

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AD46 VERIFY VEHICLE EQUIPMENT - DCSM


- Verify whether the vehicle is equipped with a Dual Climate Controlled Seat Module (DCSM).
- Is the vehicle equipped with a DCSM?

Yes
GO to AD47.

No
GO to AD48.

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AD47 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE DCSM DISCONNECTED


- Disconnect: DCSM C3265c .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD68.

No
GO to AD48.

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AD48 VERIFY VEHICLE EQUIPMENT - APIM


- Verify whether the vehicle is equipped with an Accessory Protocol Interface Module (APIM).
- Is the vehicle equipped with an APIM?

Yes
GO to AD49.

No
GO to AD50.

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AD49 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED


- Disconnect: APIM C3342 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD69.

No
GO to AD50.

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AD50 VERIFY VEHICLE EQUIPMENT - DDM


- Verify whether the vehicle is equipped with a Driver Door Module (DDM).
- Is the vehicle equipped with a DDM?

Yes
GO to AD51.

No
GO to AD52.

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AD51 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE DDM DISCONNECTED


- Disconnect: DDM C501b .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD70.

No
GO to AD52.

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AD52 VERIFY VEHICLE EQUIPMENT - HCM-2


- Verify whether the vehicle is equipped with a Headlamp Control Module 2 (HCM-2).
- Is the vehicle equipped with an HCM-2?

Yes
GO to AD53.

No
GO to AD54.

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AD53 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE HCM-2 DISCONNECTED


- Disconnect: HCM-2 Inline C913 .
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to AD71.

No
GO to AD54.

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AD54 VERIFY VEHICLE EQUIPMENT - SIDE OBSTACLE DETECTION


- Verify whether the vehicle is equipped with side obstacle detection.
- Is the vehicle equipped with side obstacle detection?

Yes
GO to AD55.

No
REPAIR the circuits. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

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