With Automatic Transaxle (ATX)

INSTALLING THE TRANSAXLE TESTER (SET UP PROCEDURES)
Installing the transaxle tester at the TR switch connector allows the separation of the vehicle electronics from the TR switch electronics.

NOTE: During tester usage, additional DTCs may be set. Therefore, it is important that all DTCs are erased after repairs have been made. To verify the elimination of all DTCs, rerun the On-Board Diagnostic Test.

CAUTION: Do not attempt to pry off connectors with a screwdriver. This will damage the connector and could result in a transaxle concern.

1. Disconnect the emission harness at transaxle TR switch connector.

CAUTION: Route all cables away from heat sources.

MLP Attached To TR Switch:

2. Set the Bench/Drive switch to "DRIVE" mode. Install the SST onto the tester. Connect the interlace cable to the transaxle tester and then to the TR switch connector.

MLP SENSOR TEST POSITION:

3. Turn the test select switch to the "MLP SENSOR TEST" position.

MLP Tester - SST:

4. Plug the transaxle tester power supply plug into the cigarette lighter receptacle.

NOTE: At this time, all LED's should illuminate for a short period and then turn off. This is the tester internal circuit check.

TESTING THE TR SWITCH
Static testing procedures allow for shop testing of the transaxle in the vehicle or on the bench. Completion of these tests prove out the TR switch electronically.

CAUTION: For resistance checks, be sure that the tester select switch is set to the "MLP SENSOR TEST" position or damage to the ohmmeter may result.

RESISTANCE/CONTINUITY TESTS
- Using a digital volt-ohmmeter and the transaxle tester, perform the pinpoint test "D" as indicated in DTC P0707.
- Perform repairs as indicated by the pinpoint test. Always retest and road test the vehicle after a repair.

TR Switch Resistance Tests
- Set the ohmmeter to the 1,000 ohm range.
- Connect the positive lead of the ohmmeter to the MLP jack.
- Connect the negative lead of the ohmmeter to the SIGRTN jack.
- Move the selector lever into each range position.
- Record the resistance at each position.
- Refer to the chart for values.

TR Switch Resistance Chart:

- If out of range, refer to Transmission Control Systems/Testing and Inspection/Procedures/Trouble Code Charts/DTC P0707.

Park/Neutral Backup Light And Optional Circuit Voltage Tests

NOTE: LED will turn "RED" when the circuit is closed and turn "OFF" when the circuit is open.

MLP Tester Switch Position:

1. Set the tester select switch to the "MLP SENSOR TEST" position.
2. Press and hold each button while moving the selector lever through each range position.
3. Monitor each "LED".

MLP LED Function:

4. The status "LED" should indicate "RED" only in the indicated position. Refer to the overlay.
5. If the LED does not indicate "RED" in the desired position, or indicated "RED" in another position, first verify the TR switch alignment and then retest. If the switch fails, then replace.

REMOVING THE TRANSAXLE TESTER AND CLEARING DTCs

CAUTION: Do not attempt to pry off connectors with a screwdriver. This will damage the connector and could result in a transaxle concern.

MLP Hookup:

1. Disconnect the transaxle tester from the TR switch connector.
2. Reinstall the emission harness. Verify the connection by pulling up on the harness.

MLP Tester:

3. Disconnect the transaxle tester power lead from vehicle.
4. Erase all DTCs. (Unlatch the center button of the star tester while the codes are being displayed on a KOEO on-board diagnostic test)
5. Return to the on-board diagnostic test.
6. Verify that the customer concern has been eliminated.