Solenoid Valve Check
- Use scan tool MB991958 (M.U.T.-III sub assembly) to check the transmission fluid temperature. The desired transmission fluid temperature 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 chart below.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STANDARD VALVE:
RESISTANCE SPECIFICATIONTERMINAL NO. NAME RESISTANCE 7 - 10 Torque converter clutch solenoid valve 2.7 - 3.4 Ω [at 20°C (68°F)] 6 - 10 Low-reverse solenoid valve 4 - 9 Second solenoid valve 3 - 9 Underdrive solenoid valve 5 - 9 Overdrive solenoid valve 8 - 9 Reduction solenoid valve <5A/T> - 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.
Standard valve: 2.7 - 3.4 Ω [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.