DTC P1795. Chevrolet Joy 2008

For 1990-2009 cars

### Circuit Description

This circuit controls the line pressure solenoid through the TCM. The TCM outputs a duty cycle to control the line pressure. A ground circuit is necessary for controlling the line pressure.

### DTC Descriptor

This diagnostic procedure supports the following DTC: DTC P1795 Pressure Control Solenoid Ground Return Circuit Malfunction

### Conditions for Setting the DTC

• | If the internal data is set as ON, but the port is regarded as Off by the monitor.

• | Open or short circuit in the wiring harness and/or connector(s)

• | Pressure control solenoid malfunction

• | Ground return circuit malfunction

• | TCM malfunction

### Action Taken When the DTC Sets

• | The TCM will not request illumination of the malfunction indicator lamp (MIL), but will store the DTC when the TCM detects failures on two consecutive driving cycles.

• | Line pressure is maximum.

• | Pressure control solenoid is turned off.

### Conditions for Clearing the MIL/DTC

Clear the DTCs with a scan tool.

### Conditions for Clearing the DTC

• | A scan tool can clear the DTC.

• | The PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring.

• | The PCM cancels the DTC default actions when the fault no longer exists and the DTC passes.

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Diagnostic System Check - Automatic Transmission? | -- | Go to Step 2 | Go to Diagnostic System Check - Automatic Transmission

2

1. Turn the ignition OFF.
2. Disconnect the solenoid wiring connector at the transmission.
3. Check the resistance between the solenoid connector terminal 3 and ground.

Is the resistance in the specified range?

2.9 ohms 20°C (70°F)

Go to Step 3

Go to Step 5

3

1. Disconnect the TCM connector and the pressure control solenoid connector.
2. Perform a continuity check between the solenoid connector terminal 3 and the TCM connector Terminal 1.
3. Perform a continuity check between the solenoid connector terminal 5 and the TCM connector Terminal 2.

Is there continuity?

Go to Step 4

Go to Step 5

4 | Replace the pressure control solenoid. Does the pressure control solenoid operate correctly? | -- | Go to Step 7 | Go to Step 6
5 | Repair the wiring harness as necessary. Refer to Wiring Repairs . Is the action complete? | -- | Go to Step 7 | --
6 | Replace the TCM. Refer to Transmission Control Module Replacement . Is the action complete? | -- | Go to Step 7 | --

7

1. After the repair, use a scan tool clear info function and road test the vehicle.
2. Review the DTC info.
3. Observe the DTC Information with a scan tool.

Did the last test fail or is the current DTC displayed?

--

Go to Step 2

System OK