Transmission Control Module, Checking
Transmission Control Module, Checking
The Transmission Control Module (TCM) (J217) receives information from the components that affect the shifts and forwards this information to the pressure regulator valves of the valve body, which control the slide valves in the valve body.
The following table provides quick links to all chapters in this section.
Transmission Control Module Voltage Supply, Checking
Special tools, testers and auxiliary items required
• Multimeter.
• Wiring diagram.
Requirements
• Fuse (S15) OK.
• The battery voltage must be at least 12.5 volts.
• The Ground (GND) connections at the transmission OK.
• The parking brake engaged.
• The selector lever of automatic transmission in position "P".
• All electrical consumers switched off.
• The ignition switched off.
Test procedure
- Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] General Diagnosis
Start diagnosis
Removal
- Remove the center dash panel - 1 - in the direction of the - arrow -.
- Remove the right upper dashboard panel.
- Remove the three center screws - 1 -
- Remove the right upper dashboard panel - 1 - in the direction of - arrow A - and - arrow B -.
- Pull the Transmission Control Module (TCM) (J217) electrical harness electrical connector - 1 - retaining tab in the direction of the - arrow - and remove from the Transmission Control Module (TCM) (J217) - 2 -.
- Remove the retaining nuts - 3 - and the Transmission Control Module (TCM) (J217) - 2 - in the direction of the - arrow -.
- 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 not OK:
- Repair the malfunction.
If the electrical harness connector is OK:
Checking voltage
- Switch the ignition on.
- Using a Multimeter, check the Transmission Control Module (TCM) (J217) electrical harness connector T68 terminal 45 to Ground (GND) for voltage.
Specified value: battery voltage.
- Switch the ignition off.
If the specified value was not obtained:
- Check the wiring from the Transmission Control Module (TCM) (J217) electrical harness connector T68 terminal 45 to the fuse S15 for an open circuit or a short circuit.
- If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking Ground (GND)
- Ensure key is off.
- Using a Multimeter, check the Transmission Control Module (TCM) (J217) electrical harness connector T68 terminals 1 to Ground (GND) for resistance.
Specified value: 1.5 ohms
If the specification was not obtained:
- Check the wiring for a an open circuit.
- If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring:
- Replace the Transmission Control Module (TCM) (J217). Refer to => [ Transmission Control Module, Replacing ].
- 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 ] Readiness Code.
- End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
- Replace the Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) (J248). Refer to => [ Diesel Direct Fuel Injection ECM, Replacing ] Diesel Direct Fuel Injection ECM, Checking.
- Assembly is performed in the reverse of the removal.
- Installation is performed in the reverse order of removal. note the following:
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. Generate readiness code. => [ Readiness Code ] Readiness Code.
Transmission Control Module, Replacing
• To achieve optimal anti-theft protection for the vehicle, an anti-theft immobilizer was installed. The anti-theft immobilizer is a system for enabling/locking the Transmission Control Module (TCM) (J217).
• To perform adaptation of the anti-theft immobilizer.
Procedure
Check the identification of the previous Transmission Control Module (TCM) (J217) as follows:
- Connect the scan tool.
- Switch the ignition on.
- Select "Diagnostic mode 9: Vehicle information."
- Select the"Test-ID 04: Calibration identification".
- The Transmission Control Module (TCM) (J217) identification will be displayed, e.g.: 09G27750 L 0301
- End diagnosis and switch the ignition off.
Removal
- Remove wiper arms and windshield cowl.
- Open locking mechanism of connector in direction of arrow and disconnect connector from the Transmission Control Module.
- Remove mounting bolts (arrows)
- Remove old Transmission Control Module.
Installation
- Installation is performed in the reverse order of removal. note the following:
- Check the identification of the new Transmission Control Module (TCM) (J217) to ensure it matches the old Transmission Control Module (TCM) (J217).
- Code the Transmission Control Module (TCM) (J217).
- 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 ] Readiness Code.
- End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK:
- Replace the Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) (J248). Refer to => [ Diesel Direct Fuel Injection ECM, Replacing ] Diesel Direct Fuel Injection ECM, Checking.
- 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. Generate readiness code. => [ Readiness Code ] Readiness Code.