Solenoid Valve Check
WARNING: This page is about a different variant/trim than selected.
- Use scan tool MB991958 (MUT-III sub assembly) to measure the transmission fluid temperature. The desired transmission fluid temperature setting for performing the solenoid valve check is 20°C (68°F).
- Remove the A/T control solenoid valve assembly connector.
- Measure the resistance between the solenoid valve terminals.
- The measured resistance of the solenoid valve when the transmission fluid temperature is 20°C (68°F) should match the specified resistance on the illustration.
- If the solenoid valve resistance is within the specified range, check the power supply and the ground circuits.
- If the solenoid valve resistance is not within the specified range, drain the transmission fluid and remove the valve body cover.
- Disconnect the connector of any solenoid valves that are not within the specified range.
- Measure the resistance between terminals 1 and 2 of any solenoid valve that was not within the specified range.
Specified resistance: 2.7 - 3.4 +/- [at 20°C (68°F)]
- If the resistance is not within the specified range, replace the solenoid valve.
- If the resistance is within the specified range, check the wiring harness between the affected A/T control solenoid valve assembly and the solenoid valve. If a problem is not found in the above steps, check the solenoid valve O-rings and replace them if necessary.