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Check Transmission Control Module (TCM)

WARNING: This page is about a different car, the 2005 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
CHECKING TRANSMISSION CONTROL MODULE (TCM)

Step Check Yes No
1 CHECK TCM SIGNAL. 
  1. Lift-up the vehicle and support it with rigid racks.
  2. Drive the vehicle faster than 10 km/h (6 MPH).
    WARNING: Be careful not to get caught in the running wheels.
  3. Measure the voltage between TCM connector and chassis ground.

Connector & terminal 
(B56) No. 1 (+) - Chassis ground (-): 		 Is the voltage 1V > 5V? Go to step 2  . Check TCM. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >
2 CHECK HARNESS BETWEEN TCM AND COMBINATION METER. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from TCM and combination meter.
  3. Measure the resistance between TCM harness connector and combination meter harness connector.

Connector & terminal 
(B56) No. 1 - (i10) No. 12: 		 Is the resistance less than 10 ohm? Check the speedometer. < Ref. to REMOVAL , Speedometer. > Repair the wiring harness.
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