Trouble Code Conditions

Special Tools:
- 981 3190
- 998 8686

Trouble Code Conditions
- The load signal (TQ) from the engine control module (ECM) provides the transmission control module (TCM) with information about the torque being delivered by the engine. This signal also provides information about engine speed (rpm), and whether the engine is idling or if fuel is shut-off. Diagnostic trouble code (DTC) AT-134 is stored if the transmission control module does not register an incoming load signal when the transmission speed sensor signal indicates that input shaft speed is above 600 rpm after the torque converter.

Substitute value(s)
- The transmission control module "Emergency mode I" program has been initiated.

Possible source(s)
- Combined instrument panel warning lamp flashes once when the fault is detected.
- Open-circuit in signal cable.
- Short-circuit to supply voltage or ground in the signal cable.
- Contact resistance in terminals.

Fault symptom(s)
- No lock-up function.
- No adaption of the gear slippage times at high altitude (High Altitude Compensation)
- Start fault-tracing. Faulty Signal