P0741

Diagnostic Chart:

Wiring Diagram:

Circuit Description
The PCM energizes the Torque Converter Clutch (TCC) Pulse Width Modulated (PWM) Solenoid Valve by creating a ground path on circuit 418. When the PCM grounds (energizes) the TCC PWM Sol. Valve, the TCC PWM Sol. Valve stops the converter signal oil from exhausting. This causes the converter signal oil pressure to increase and shift the TCC valve. The TCC PWM Sol. Valve will de-energize when the PCM no longer provides a ground path. When the TCC PWM Sol. Valve is de-energized, the TCC PWM Sol. Valve exhausts fluid and releases the TCC. If the PCM detects high torque converter slip when the TCC is commanded ON, then DTC P0741 sets. DTC P0741 is a type A DTC.

Conditions for Setting the DTC

^ No Accelerator Pedal Position (APP) Sensor DTCs P0121, P0122, P0220, P0221, P0222, P0223, P0225, P0226, P0227, or P0228.
^ No Output Speed (OSS) Sensor DTCs P0722 or P0723.
^ No Input Speed (ISS) Sensor DTCs P0716 or P0717.
^ No TCC PWM Sol. Valve DTCs P0742 or P1860.
^ No Transmission Fluid Pressure (TFP) Val. Position Sw. DTC P1810.
^ The TCC PWM Sol. Valve is commanded in 2nd or 3rd or greater than 0.6 seconds.
^ The engine must be running for at least 5 seconds.
^ The TCC is applied for greater than 0.6 seconds.
^ The gear ratio must indicate 2nd or 3rd gear.
^ The Throttle Position is greater than 20%.
^ The TFP Val. Position Sw. must be in D4, D3, or D2.
^ The Transmission Fluid Temperature (TFT) must be -10 to +150°C (14-302°F).
^ The TCC slip speed is greater than 65 RPM for 4 seconds.
^ All conditions must be met for a total of 2 occurrences.

Action Taken When the DTC Sets

^ The PCM inhibits the TCC.
^ The PCM inhibits 4th gear.
^ The PCM illuminates the Malfunction Indicator Lamp (MIL).

Conditions for Clearing the MIL/DTC
1. The PCM turns OFF the MIL after three consecutive ignition cycles without a failure reported.
2. A scan tool can clear the DTC from the PCM history. The PCM clears the DTC from the PCM history if the vehicle completes 40 warm-up cycles without a failure reported.
3. The PCM cancels the DTC default actions when the fault no longer exists and the ignition is OFF long enough in order to power down the PCM

Diagnostic Aids

^ Inspect the wiring for poor electrical connections at the PCM Inspect the wiring for poor electrical connections at the transmission 20-way connector. Look for the following conditions:

- A bent terminal
- A backed out terminal
- A damaged terminal
- Poor terminal tension
- A chafed wire
- A broken wire inside the insulation

^ First diagnose and clear any engine DTCs or APP Sensor codes that are present. Then inspect for any transmission DTCs that may have reset.