Pinpoint Test H: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool

Communications Network

Pinpoint Test H: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool

Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 30, Transmission Controls - 6HP26 for schematic and connector information. Diagrams By Number

Normal Operation

The Transmission Control Module (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 CBB53 (GY/BN) and SBB46 (BN/RD). Circuit GD113 (BK/YE) provides ground.

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 taking 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.

H1-H3:

H3-H4: