Escape 2WD L4-2.5L Hybrid (2010)
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).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
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.
-
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. See: Diagrams/Electrical
Diagrams/Diagrams By Number
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H2 CHECK THE TCM GROUND CIRCUITS FOR AN OPEN
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Ignition OFF.
-
Disconnect: Negative Battery Cable .
-
Measure the resistance between the TCM C1458a-2, circuit GD121 (BK/YE), harness side and ground; and between the TCM C1458a-8, circuit
GD121 (BK/YE), harness side and ground.
