Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    CAN data bus, TCM - no signal
Cause:
    TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM

Ford
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Battery Supply to VLCM A/C Circuit Conditions
Cause:
    Key on or engine running and the PCM detected no battery power at the VLCM fan circuit

GM
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Pass Key® II Fuel Enable Circuit Conditions
Cause:
    Key on, then the PCM detected that no Fuel Enable signal was received from the Theft Deterrent Module after engine startup

Isuzu
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Immobilizer system - ECM to body control module communication malfunction
Cause:
    Wiring, ECM, body control module

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    CAN data bus, TCM - no signal
Cause:
    TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM