Test T: The Liftgate/Trunk Module (LTM) Does Not Respond To The Scan Tool

PINPOINT TEST T: THE LIFTGATE/TRUNK MODULE (LTM) DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The liftgate/trunk module (LTM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the LTM. The LTM shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module - electronic manual temperature control (EMTC) (if equipped), the heating ventilation air conditioning (HVAC) module - electronic automatic temperature control (EATC) (if equipped), the audio control module (ACM), the audio digital signal processing (DSP) module (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), the power running board (PRB) module (if equipped), the parking aid module (PAM) (if equipped), the rear entertainment module (RETM) (if equipped), the audio rear control unit (RCU) (if equipped), the driver seat module (DSM) and the dual climate control seat module (DCSM) (if equipped). Voltage for the LTM is provided by circuits SBP14 (BN/RD) and SBB27 (BU/RD). Circuit GD149 (BK/GY) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuses
- Wiring, terminals or connectors
- LTM

T1:

T2-T3:

T4: