Transaxle Functional Check

Transaxle Circuit:

Before using the Transaxle Test Box J 38791 as described in the functional checks, the following procedure should be performed to ensure proper diagnosis and avoid replacement of good parts.

1. Check for stored PCM codes. If PCM codes are present, refer to Diagnostic Trouble Codes and repair cause of code before performing functional checks. Testing and Inspection

2. Connect Test Box J 38791:
^ Disconnect the vehicle transaxle wiring harness from the transaxle.

^ Connect the test box connectors to the vehicle harness and transaxle connectors.

^ Route the test box harness under the rear of the hood and through the driver's window. Ensure that the harness cannot contact the exhaust manifold or cooling fans, using tie straps if necessary.

^ Test box "GEAR SELECTOR" rotary switch to "NORMAL."

^ Insert the test box ground connector into the cigar lighter receptacle.

3. Observe the indicator lights on the test box with the ignition "ON," engine not running:

^ "BATTERY," "IGN," "BRAKE," "SHIFT A," and "SHIFT B" should be "ON." Converter clutch "APPLY" and "MOD" indicators should be "OFF." (Disregard "LO DISCRETE," "2-3" and "3-4" indicator lights.)

^ If indicator lights do not function as described above, check all connections. If connections are good and indicators still do not work properly, find symptom being experienced and repair as indicated:

- No lights "ON" OR IGN light only "ON": Check connection at cigar lighter receptacle. If OK, fuse for cigar lighter or cigar lighter receptacle is faulty.

- "BATTERY" light "ON," all others "OFF": Check 15 amp "IGN" fuse and repair short to ground in CKT 350 if blown. If OK, check for an open in CKT 350 or CKT 300, refer to FUSE BLOCK DETAILS.


- "IGN" light not "ON": Check for an open in CKT 350 to transaxle harness connector terminal "E".

- "BRAKE" light not "ON": DTC 38

^ "SHIFT A" indicator "SHIFT B" light(s) not "ON":

- Converter clutch "APPLY" light "ON" all the time: Disconnect PCM green connector and check CKT 422 for a short to ground. If OK, PCM is faulty.

- Converter clutch "MOD" light "ON" all the time: Disconnect PCM green connector and check CKT 584 for a short to ground. If OK, PCM is faulty.

4. Proceed with functional check.