Pinpoint Tests QD: Unable To Activate Transmission Control Module (TCM) Self-Test: Introduction
WARNING:
To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
This pinpoint test is intended to diagnose the following:
- unable to communicate with the TCM
- incorrect self-test procedure
- harness circuits: B+, PWRGND and VPWR
Harness Side
| Circuit | Pin |
|---|---|
| TCMRC (Transmission Control Module Relay Control) | 40 |
| VPWR (Vehicle Power) | 9 |
| VPWR (Vehicle Power) | 10 |
| VPWR (Vehicle Power) | 29 |
| B+ (Battery Positive Voltage) | 6 |
| PWRGND (Power Ground) | 1 |
| PWRGND (Power Ground) | 2 |