Solenoid Valve Check

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.

Fig 1: Identifying Terminals Of A/T Control Solenoid Valve Assembly Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
The measured resistance of the solenoid valve when the transmission fluid temperature is 20°C (68°F) should match the specified resistance. See Fig 2.

Fig 2: Solenoid Valve Resistance Chart
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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.

Fig 3: Identifying Solenoid Valves

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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 Ω[at 20°C (68°F)]

Fig 4: Measuring Resistance Between Solenoid Valve Terminals 1 And 2
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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.