Mariner 2WD L4-2.5L (2009)
See: Diagrams/Electrical Diagrams/Diagrams By Number
Normal Operation
The Transmission Control Module (TCM) is present on Hybrid vehicles only. The TCM 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
TCM. Voltage for the TCM is provided by circuits CBB24 (VT/GN) and SBB05 (GY/RD). Ground is provided by circuit GD121 (BK/YE).
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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TCM
PINPOINT TEST H: THE TCM DOES NOT RESPOND TO THE SCAN TOOL
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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H1 CHECK THE TCM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
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Ignition OFF.
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Disconnect: TCM C1458a.
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Ignition ON.
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Measure the voltage between the TCM, harness side and ground as follows:
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Are the voltages greater than 10 volts?
Yes
GO to H2.
No
VERIFY the Battery Junction Box (BJB) fuse 5 (10A) or fuse 24 (10A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring
Diagrams to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
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H2 CHECK THE TCM GROUND CIRCUITS FOR AN OPEN
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Measure the resistance between the TCM harness side and ground as follows: