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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 AB: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding >> Part 1

Part 1




Communications Network


Pinpoint Tests

Pinpoint Test AB: No High Speed Controller Area Network (HS-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 High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Cruise-Control Module (C-CM) (if equipped)
- Head Up Display (HUD) module (if equipped)
- Instrument Panel Cluster (IPC) (gateway module)
- Occupant Classification System Module (OCSM)
- Parking Aid Module (PAM) (if equipped)
- PCM
- Power Steering Control Module (PSCM)
- Remote Function Actuator (RFA) module (if equipped)
- Restraints Control Module (RCM)



PINPOINT TEST AB: NO HS-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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AB1 CHECK THE DLC PINS FOR DAMAGE


- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC pins 6 and 14 for damage.




- Are DLC pins 6 and 14 OK?

Yes
GO to AB2.

No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.

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AB2 CHECK THE HS-CAN TERMINATION RESISTANCE


- Ignition OFF.
- Disconnect: Negative Battery Cable .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance between 54 and 66 ohms?

Yes
GO to AB3.

No
GO to AB5.

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AB3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND


- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
GO to AB4.

No
GO to AB23.

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AB4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE


- Connect: Negative Battery Cable .
- Ignition ON.
- Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.




- Are the voltages greater than 6 volts?

Yes
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The HS-CAN has tested within specifications. GO to Pinpoint Test AA to diagnose an intermittent HS-CAN fault. Pinpoint Test AA: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be Intermittentl

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AB5 CHECK THE HS-CAN TERMINATION RESISTOR


- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance between 108 and 132 ohms?

Yes
GO to AB6.

No
GO to AB9.

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AB6 CHECK THE HS-CAN TERMINATION RESISTOR WITH THE PCM DISCONNECTED


- Disconnect: PCM C175b .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance between 108 and 132 ohms?

Yes
GO to AB7.

No
GO to AB8.

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AB7 CHECK THE HS-CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN


- For 3.5L, measure the resistance between the PCM C175b-2, circuit VDB04 (WH/BU), harness side and the DLC
C251-6, circuit VDB04 (WH/BU), harness side.




- For 3.5L, measure the resistance between the PCM C175b-3, circuit VDB05 (WH), harness side and the DLC
C251-14, circuit VDB05 (WH), harness side.




- For 3.5L GTDI, measure the resistance between the PCM C1381b-59, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.




- For 3.5L GTDI, measure the resistance between the PCM C1381b-58, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Are the resistances less than 5 ohms?

Yes
CONNECT the negative battery cable. GO to AB35.

No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

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AB8 CHECK THE HS-CAN CIRCUITS BETWEEN THE IPC AND THE DLC FOR AN OPEN


- Disconnect: Instrument Panel Cluster (IPC) C220 .
- Measure the resistance between the IPC C220-25, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.




- Measure the resistance between the IPC C220-26, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Are the resistances less than 5 ohms?

Yes
CONNECT the negative battery cable. GO to AB43.

No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

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AB9 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER


- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to AB11.

No
GO to AB10.

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AB10 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR AN OPEN


- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance greater than 10,000 ohms?

Yes
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
A capacitor internal to a module may still be draining causing irregular resistance readings. WAIT 5 minutes. REPEAT the pinpoint test.

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AB11 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PCM DISCONNECTED


- Disconnect: PCM C175b .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
If the vehicle is equipped with a PAM, GO to AB12.

If the vehicle is not equipped with an PAM, GO to AB13.

No
CONNECT the negative battery cable. GO to AB35.

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AB12 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PAM DISCONNECTED


- Disconnect: PAM C4014 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to AB13.

No
CONNECT the negative battery cable. GO to AB36.

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AB13 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ABS MODULE DISCONNECTED


- Disconnect: ABS Module C135 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
If the vehicle is equipped with a 4X4 control module, GO to AB14.

If the vehicle is not equipped with a 4X4 control module, GO to AB15.

No
CONNECT the negative battery cable. GO to AB37.

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AB14 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE 4X4 CONTROL MODULE DISCONNECTED


- Disconnect: 4X4 Control Module C281 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to AB15.

No
CONNECT the negative battery cable. GO to AB38.

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AB15 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RCM DISCONNECTED


- Disconnect: Restraints Control Module (RCM) C310b .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
If the vehicle is equipped with a Remote Function Actuator (RFA) module, GO to AB16.

If the vehicle is not equipped with an RFA module, GO to AB17.

No
CONNECT the negative battery cable. GO to AB39.

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AB16 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RFA MODULE DISCONNECTED


- Disconnect: RFA Module C2153d .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to AB17.

No
CONNECT the negative battery cable. GO to AB40.

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