P1895

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The ECM outputs a Pulse Width Modulated (PWM) signal to the ABS controller and the Transmission Control Module (TCM) which is proportional to the engine torque. This signal provides a base line torque value in order to determine the degree of torque reduction required as well as feedback to the ABS controller and the TCM during a torque reduction event. This circuit is pulled up to B+ within the ECM. The ECM induces a signal on the circuit by Pulse Width Modulating the circuit to ground.

CONDITIONS FOR RUNNING THE DTC

Tests continuously

CONDITIONS FOR SETTING THE DTC

The TCM detects an open, short to ground, or short to B+ on the circuit.

ACTION TAKEN WHEN THE DTC SETS

^ The Malfunction Indicator Lamp (MIL)/Service Transmission Lamp (STL) will not illuminate.

^ The TCM memory stores the DTC at the time of the first failure.

CONDITIONS FOR CLEARING THE MIL/DTC

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

^ The scan tool clears the MIL/DTC.

DIAGNOSTIC AIDS

Use the Connector Test Adapter Kit J 35616-A for any test that requires probing the TCM harness connector or a component harness connector. Using this kit will prevent damage to the harness connector terminals.

Check for the following conditions:

^ Poor connections at the TCM or at the component. Inspect the harness connectors for any backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. Refer to Overall Vehicle Information / Diagrams / Diagnostic Aids for Checking Terminal Contact procedure.

^ Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving any related connectors and any wiring harnesses. A change in the display may help to locate the fault.

TEST DESCRIPTION

The number(s) below refer to the step number(s) on the Diagnostic Table.

3. it the circuit voltage restores when the ABS controller disconnects, there is a problem with the ABS system. Refer to Antilock Brake System (ABS).