Mariner 2WD L4-2.5L (2009)
Yes
INSTALL a new TCM. 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. CLEAR the DTCs. REPEAT the
network test with the scan tool.
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Pinpoint Test I: The Battery Control Module (BCM) Does Not Respond To The Scan Tool
Communications Network
Pinpoint Tests
Pinpoint Test I: The Battery Control Module (BCM) Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Module Communications Network for schematic and connector
information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 23 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Electronic Engine Controls - 2.3L for schematic and connector
information. See: Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The Battery Control Module (BCM) is present on Hybrid vehicles only. The BCM communicates with the scan tool through the High Speed Controller
Area Network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the BCM.
Voltage for the BCM is provided by circuits CBB23 (BN/YE), SBB05 (GY/RD) and SBB15 (WH/RD). Ground is provided by circuits GD182
(BK/GY) and GD149 (BK/GY).
This pinpoint test is intended to diagnose the following:
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Fuse
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Wiring, terminals or connectors
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BCM
PINPOINT TEST I: THE BCM DOES NOT RESPOND TO THE SCAN TOOL
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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I1 CHECK THE POWER TO THE BCM
WARNING: When servicing the high-voltage system, establish a buffer zone per the specified procedure. Failure to follow this instruction may
result in serious personal injury or death.
WARNING: Turn OFF the ignition switch for a minimum of 5 minutes before removing high-voltage cables. High-voltage cables and wiring
are orange in color. The nominal high-voltage traction battery voltage (HVTB) is 330 V DC. Failure to follow these instructions may result in
serious personal injury or death.
WARNING: Depower the high-voltage traction battery (HVTB) before carrying out any removal or installation procedures affecting the
high-voltage battery system. Failure to follow this instruction may result in serious personal injury or death.
WARNING: Wear high-voltage insulated safety gloves and a face shield when working with high-voltage batteries or cables. The high-voltage
insulated safety gloves should be of the appropriate safety and protection rating. Inspect the gloves before use and always wear them with the
leather outer glove. Any hole in the rubber insulating glove is a potential entry point for high-voltage. Failure to follow these instructions may
result in serious personal injury or death.
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Ignition OFF.
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Disconnect: BCM C4227a.
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Ignition ON.
-
Measure the voltage between the BCM, harness side and ground as follows: