P0701

DTC P0701

Circuit Description

The transmission control module (TCM) monitors the status of the pressure switches at start-up to detect the presence of hydraulic pressure.

DTC P0701 is a type C DTC.

Conditions for Running the DTC

The components are powered and ignition voltage is greater than 9.0 volts and less than 18 volts. Engine speed is greater than 200 RPM and less than 7,500 RPM for 5 seconds.

Conditions for Setting the DTC

DTC P0701 sets when the TCM detects the following conditions:

- Transmission fluid temperature is above -25°C (-13°F).
- All pressure switches do not indicate pressure at startup.
- Engine speed is above 500 RPM for 6 seconds or 400 RPM for 15 seconds.
- Forward or REVERSE range is selected.

Action Taken When the DTC Sets

- The TCM does not illuminate the malfunction indicator lamp (MIL).
- DTC P0701 will be stored in TCM history.
- TCM inhibits torque converter clutch (TCC) engagement.

Conditions for Clearing the DTC

A scan tool can clear the code from TCM history. The TCM automatically clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without failure.

Diagnostic Aids

- Inspect the wiring for poor electrical connections at the TCM. Inspect 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.
- When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.
- You may have to drive the vehicle in order to experience a condition.
- DTC P0701 may be logged if a forward or REVERSE range is selected immediately after the engine is started, and before the TCM detects pressure at the switches, 2-6 seconds after engine start.
- A plugged control main filter may cause this code to set.

Test Description

The number below refers to the step number on the diagnostic table.

5. This step tests for line pressure.