Automatic Transmission Hydraulic Pressure Sensor, Checking

Automatic Transmission Hydraulic Pressure Sensor, Checking

• This procedure is used to diagnose Automatic Transmission Hydraulic Pressure Sensor 1 (G193) and Automatic Transmission Hydraulic Pressure Sensor 2 (G194)

Special tools, testers and auxiliary items required

• Multimeter

• Wiring diagram

• The Transmission Control Module (TCM) (J217) fuse OK.

• The battery voltage must be at least 12.5 Volts.

• All electrical consumers must be switched off.

• The parking brake must be engaged.

• The selector lever must be in the "P" position.

• The Ground (GND) connections to transmission must be OK.

• Ignition switched off.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] Preliminary Check.

Start diagnosis

- Disconnect the Automatic Transmission Hydraulic Pressure Sensor electrical harness connector - 1 -.





- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- Repair any damage found to the electrical harness connector.

If the electrical harness connector is OK:

Checking wiring

If the manufacturers test box is being used. Perform the following step.

- Install the Adapter F/VAG1598 (68 Pin) (VAG1598/22 ).

If the manufacturers test box is not being used. Perform the following step.

- Remove the Transmission Control Module (TCM) ( J217). Refer to => [ Transmission Control Module, Replacing ] Service and Repair.

- Using a multimeter, check the Automatic Transmission Hydraulic Pressure Sensor electrical harness connector terminals to the Transmission Control Module (TCM) (J217 ) electrical harness connector T52 terminals for resistance.













Specified value: 1.5 ohms Max.

If the specification was not obtained:

- Check the wiring for an open circuit, short circuit to each other, Battery (+), and Ground (GND).

- If necessary, repair the faulty wiring connection.

If no malfunction was found in the wiring and the resistance was not OK:

- Replace the faulty Automatic Transmission Hydraulic Pressure Sensor. Refer to Automatic Transmissions, Repair Group 38.

- Erase the DTC memory. Refer to => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

- Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to => [ Readiness Code, Setting ] Readiness Code, Setting.

- End of diagnosis.

If the DTC does return and no malfunction is detected in the wiring and resistance was OK:

- Replace the Transmission Control Module (TCM) ( J217). Refer to => [ Transmission Control Module, Replacing ] Service and Repair.

- Assembly is performed in the reverse of the removal.

Final procedures

1. Check the DTC memory. Refer to => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.

2. If necessary, erase DTC memory of the Transmission Control Module (TCM) (J217). => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.

3. If the DTC memory was erased, generate readiness code. Refer to => [ Readiness Code, Setting ] Readiness Code, Setting.

End of diagnosis.