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Solenoid Valve Check

  1. Use scan tool MB991502 to measure the A/T fluid temperature. The desired A/T fluid temperature setting for performing the solenoid valve check s 20°C (68°F).
  2. Remove the A/T control solenoid valve assembly connector.
    Fig 1: Locating A/T Control Solenoid Valve Assembly
    G02693544Courtesy of DAIMLERCHRYSLER CORP.
  3. Measure the resistance between the solenoid valve terminals.
  4. The measured resistance of the solenoid valve when the A/T fluid temperature is 20°C (68°F) should match the specified resistance on the chart below.

    Specified resistance: 

    SOLENOID VALVE CHECK

    TERMINAL NO. NAME RESISTANCE
    No. 7 - No. 10 Torque converter clutch solenoid valve 2.7 - 3.4 Ω [at 20°C (68°F)]
    No. 6 - No. 10 Low-reverse solenoid valve 2.7 - 3.4 Ω [at 20°C (68°F)]
    No. 4 - No. 9 Second solenoid valve 2.7 - 3.4 Ω [at 20°C (68°F)]
    No. 3 - No. 9 Underdrive solenoid valve 2.7 - 3.4 Ω [at 20°C (68°F)]
    No. 5 - No. 9 Overdrive solenoid valve 2.7 - 3.4 Ω [at 20°C (68°F)]
  5. If the solenoid valve resistance is within the specified range, check the power supply and the ground circuits.
  6. If the solenoid valve resistance is not within the specified range, drain the A/T fluid and remove the valve body cover.
  7. Disconnect the connector of any solenoid valves that are not within the specified range.
    Fig 2: Locating A/T Control Solenoid Valves
    G02693545Courtesy of DAIMLERCHRYSLER CORP.
  8. 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)] 

  9. If the resistance is not within the specified range, replace the solenoid valve.
  10. 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.
    Fig 3: Checking A/T Control Solenoid Valve Resistance
    G02693546Courtesy of DAIMLERCHRYSLER CORP.
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