ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 3048 > < Initial Inspection and Diagnostic Overview|Page 3046
Page 79
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DISCONNECTED

-

Disconnect: 4X4 Control Module C3253.

-

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

-

Are the resistances greater than 1,000 ohms?

Yes

CONNECT the negative battery cable. GO to T34.

No

GO to T26.

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T26 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 T35.

No

GO to T27.

-------------------------------------------------
T27 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCSM DISCONNECTED

-

Disconnect: Occupant Classification System Module (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.

-

Are the resistances greater than 1,000 ohms?

Yes

CONNECT the negative battery cable. GO to T36.

No

Initial Inspection and Diagnostic Overview|Page 3048 > < Initial Inspection and Diagnostic Overview|Page 3046