Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 2011 >> Flex AWD V6-3.5L Turbo >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test V: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding >> V21-V40

V21-V40




Communications Network

Pinpoint Tests

Pinpoint Test V: 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
- ABS module
- Accessory Protocol Interface Module (APIM)
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)
- Parking Aid Module (PAM)
- PCM
- Power Steering Control Module (PSCM)
- Restraints Control Module (RCM)
- Steering Angle Sensor Module (SASM)


PINPOINT TEST V: 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, Mounting and Cables Battery Disconnect.

-------------------------------------------------
-------------------------------------------------
V21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PCM DISCONNECTED


- Disconnect: PCM C175b Or C1381b.
- 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
CONNECT the negative battery cable. GO to V31.

No
If the vehicle is equipped with a Parking Aid Module (PAM), GO to V22.

If the vehicle is not equipped with a PAM, GO to V23.

-------------------------------------------------
V22 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PAM DISCONNECTED


- Disconnect: PAM C3267.
- 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
CONNECT the negative battery cable. GO to V32.

No
GO to V24.

-------------------------------------------------
V23 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ABS MODULE DISCONNECTED


- Disconnect: ABS Module C135.
- 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
CONNECT the negative battery cable. GO to V33.

No
If the vehicle is equipped with a 4X4 control module, GO to V24.

If the vehicle is not equipped with a 4X4 control module, GO to V25.

-------------------------------------------------
V24 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND 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 ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.




- Are the resistances greater than 1,000 ohms?

Yes
CONNECT the negative battery cable. GO to V34.

No
GO to V25.

-------------------------------------------------
V25 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RCM DISCONNECTED


- Disconnect: RCM C310b.
- 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
CONNECT the negative battery cable. GO to V35.

No
If the vehicle is equipped with a Steering Angle Sensor Module (SASM), GO to V26.

If the vehicle is not equipped with a SASM, GO to V27.

-------------------------------------------------
V26 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SASM DISCONNECTED


- Disconnect: SASM C2412.
- 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
CONNECT the negative battery cable. GO to V36.

No
GO to V27.

-------------------------------------------------
V27 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCSM DISCONNECTED


- Disconnect: OCSM C3159.
- 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
CONNECT the negative battery cable. GO to V37.

No
If the vehicle is equipped with a Power Steering Control Module (PSCM), GO to V28.

If the vehicle is not equipped with a PSCM, GO to V29.

-------------------------------------------------
V28 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PSCM DISCONNECTED


- Disconnect: PSCM C1463a.
- 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
CONNECT the negative battery cable. GO to V38.

No
GO to V29.

-------------------------------------------------
V29 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC DISCONNECTED


- Disconnect: IC C220.
- 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
CONNECT the negative battery cable. GO to V39.

No
If the vehicle is equipped with an APIM, GO to V30.

If the vehicle is not equipped with a APIM, REPAIR the circuits. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

-------------------------------------------------
V30 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED


- Disconnect: APIM C3342.
- 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
CONNECT the negative battery cable. GO to V40.

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

-------------------------------------------------
V31 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 Service and Repair. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

-------------------------------------------------
V32 CHECK FOR CORRECT PAM OPERATION


- Disconnect the PAM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the PAM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new PAM. REFER to Parking Aid Service and Repair. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V33 CHECK FOR CORRECT ABS MODULE OPERATION


- Disconnect the ABS module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the ABS module connector and make sure it seats 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 Service and Repair. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V34 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION


- Disconnect the 4X4 control module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the 4X4 control module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new 4X4 control module. REFER to Four Wheel Drive (4WD) Systems Service and Repair. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V35 CHECK FOR CORRECT RCM OPERATION


- Disconnect all the RCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RCM connectors and make sure they seat correctly.
- Verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new RCM. REFER to Supplemental Restraint System Service and Repair. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V36 CHECK FOR CORRECT SASM OPERATION


- Disconnect all the SASM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SASM connectors and make sure they seat correctly.
- Verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SASM. REFER to Steering Wheel Rotation Sensor in Vehicle Dynamic Systems Steering Angle Sensor Module (SASM). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V37 CHECK FOR CORRECT OCSM OPERATION


- Disconnect the OCSM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the OCSM connector and make sure it seats correctly.
- Verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new OCSM. REFER to Supplemental Restraint System Service and Repair. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V38 CHECK FOR CORRECT PSCM OPERATION


- Disconnect all the PSCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PSCM connectors and make sure they seat correctly.
- Verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new steering gear. REFER to Power Steering Service and Repair. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V39 CHECK FOR CORRECT IC OPERATION


- Disconnect the IC connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new IC. REFER to Instrumentation, Message Center, and Warning Chimes Instrument Cluster (IC). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
V40 CHECK FOR CORRECT APIM OPERATION


- Disconnect the APIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new APIM. REFER to Information and Entertainment Systems Accessory Protocol Interface Module (APIM). CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules.

-------------------------------------------------
pro multis · About Operation CHARM