Mariner 2WD L4-2.5L (2009)
Refer to Wiring Diagram Set 23 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Electronic Engine Controls - 2.5L for schematic and connector
information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH).
This pinpoint test is intended to diagnose the following:
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Fuse
-
Wiring, terminals or connectors
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4X4 control module (if equipped)
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ABS module
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Accessory Protocol Interface Module (APIM) (if equipped)
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Instrument Cluster (IC)
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Occupant Classification System Module (OCSM)
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PCM
-
Power Steering Control Module (PSCM)
-
Restraints Control Module (RCM)
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Battery Control Module (BCM) (Hybrid only)
-
Transmission Control Module (TCM) (Hybrid only)
PINPOINT TEST S: 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. See: Initial Inspection and Diagnostic Overview/Communications Network/Inspection And Verification
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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S21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PCM DISCONNECTED
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Disconnect: PCM C175b.
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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 S31.
No
GO to S22.
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S22 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ABS MODULE DISCONNECTED
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Disconnect: ABS Module C155.
-
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.