P0758

Diagnostic Chart:

Wiring Diagram:

2nd clutch is applied when circuit 1222 is opened at the PCM. When the PCM grounds the circuit, the voltage is monitored at terminal J4A07 to check for proper circuit conditions. When condition is present, will exhibit 2nd gear starts.

DTC PARAMETERS

DTC P0758 is set when the PCM has detected the following condition twice per ignition cycle.

^ Voltage monitored at terminal J4A07 (circuit 1222) is greater than 2 - 2.5 volts when the 2nd gear actuator is switched on electrically by the PCM.

TEST DESCRIPTION

Numbered steps below refer to numbered steps on chart.

1. This step verifies problem is still present.

2. If actuator, connector plate, or circuit 1222 is shorted, DTC P0758 will set. This step will break the circuit down to find the source of the short.

3. If circuit 1222 is shorted to voltage, DTC P0758 will set. This step checks circuit 1222 for a short to voltage.

4. This step will determine if it is the actuator or the actuator connector plate that is shorted. An actuator is shorted internally when its resistance is one or more ohms lower than the average resistance of the other actuators at the same temperature.

REPAIR VERIFICATION

Monitor DTC menu "Code Status" for "Pass Since Code Clear" and "Pass This Ignition Cycle." When both have passed, repair is verified.

Criteria for pass:

^ Engine running.

^ Power present at actuators and no active faults exist for this actuator.

DIAGNOSTIC AIDS

When attempting to diagnose an intermittent problem use the Scan tool* to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.

* Select MALF History and DTC status from DTC menu of Scan tool.

Check the tightness of the female terminal grip with a spare male terminal.

When the PCM detects a fault in the circuit (open, ground, short) the PCM will open the circuit internally to protect the circuit.

^ Conditions that set this DTC will probably result in a DTC P0781 - 2nd Gear Stuck On and a DTC P0741 - No TCC.