Engine Code

Diagram Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

Part 1 (Transmission):

The ECM pulls this circuit up to 12 volts and monitors this circuit. The Transmission Control Module (TCM) also monitors this circuit. This circuit provides uni-directional communication between the two controllers. The messages are sent every 25 msec. This data is used in order to reduce the engine torque during the transmission shift events in order to improve the shift feel. If the ECM detects a problem on this circuit, this DTC will set.

Part 2 (Traction Control):

The ECM pulls this circuit down to 0 volts and monitors this circuit. The ABS/TC Module also monitors this circuit. This circuit provides uni-directional communication between the two controllers. This data is used in order to reduce the engine torque during a wheel slipping condition where traction control is needed. If the ECM detects a problem on this circuit, this DTC will set.

CONDITIONS FOR RUNNING THE DTC

Part 1 (Transmission):

Tested continuously

Part 2 (Traction Control):

^ Engine speed is greater than 600 RPM

^ Tested continuously

CONDITIONS FOR SETTING THE DTC

Part 1 (Transmission):

^ The signal remains low for at least 2 seconds.

OR

^ The signal is low 3 times for at least 2.5 seconds.

^ The above condition met within 10 seconds.

Part 2 (Traction Control):

^ The signal is out of range.

^ The above condition met for 2.5 seconds.

ACTION TAKEN WHEN THE DTC SETS

Part 1:

The ECM will not illuminate the Malfunction Indicator Lamp (MIL).

Part 2:

^ The ECM will not illuminate the Malfunction Indicator Lamp (MIL).

^ The ECM informs the ABS/TC Module that this DTC was set.

CONDITIONS FOR CLEARING THE MIL/DTC

^ A History DTC clears after forty consecutive warm-up cycles if no failures report by this diagnostic or any other emission related diagnostic.

^ The ECM battery voltage is interrupted.

^ The scan tool clears the MIL/DTC.