P2810

DTC P2810

Circuit Description

G solenoid is a normally-closed (N/C) solenoid used to modulate the transmission main pressure. Under specific conditions, low throttle setting, low engine torque, low engine speed, and low transmission output speeds, the transmission control module (TCM) commands the G solenoid on.

When G solenoid is applied, fluid is routed to the main pressure regulator valve; this in turn reduces the main pressure schedule and improves the volume of oil through the overage circuit. By modulating main pressure, cooler flow at idle can be increased allowing improved cooling and reducing transmission pump noise.

DTC P2810 is a type B DTC.

DTC Descriptor

This diagnostic procedure supports the following DTC:

- DTC P2810 Solenoid G Electrical.

Conditions for Running the DTC

- The components are powered and ignition voltage is greater than 9.0 volts and less than 18 volts.
- TCM initialization is in process or engine speed is greater than 200 RPM and less than 7,500 RPM for 5 seconds.
- The TCM must auto-detect G solenoid.

Conditions for Setting the DTC

DTC P2810 is set when the TCM detects an open circuit, short to ground, or short to power at G solenoid circuit for greater than 2 seconds.

Action Taken When the DTC Sets

- The TCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
- DTC P2810 will be stored in TCM history.

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.
- Solenoids are sensitive to battery voltage spikes and poor ground connections.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

2. This step tests ignition voltage.
3. This step tests the command signal from the TCM.
4. This step tests the resistance value of the external harness and solenoid.
5. This step tests the resistance value of the solenoid, and tests the internal wiring harness for open/shorts.
6. This step tests the resistance value of the solenoid.