Transmission Position Sensor/Switch: Testing and Inspection
INTRODUCTIONThe Transmission Tester and TR Testing Cable "E" 418-F107 (007-00111) or equivalent with Digital TR Sensor Overlay 007-00131 or equivalent allows a technician to test the digital TR sensor independent of vehicle electronics. Digital TR sensor testing is divided into four steps:
1. Preliminary diagnosis and testing.
2. Installing the Transmission Tester and TR Testing Cable " E" 418-F107 (007-00111) with Digital TR Sensor Overlay 007-00131 or equivalent.
3. Testing the digital Transmission Range (TR) sensor.
4. Testing the park/neutral, backup and optional circuits.
PRELIMINARY TESTING AND DIAGNOSIS
Before any diagnostic testing is done on a vehicle some preliminary checks must be performed. Be sure to write down any findings, especially any DTCs, for future reference.
1. Know and understand customer's concern.
2. Verify that digital TR sensor is properly adjusted in NEUTRAL.
3. Verify customer concern:
^ Upshift
^ Downshift
^ Coasting
^ Engagement
If concern involves noise or vibration, does it relate to any of the following?
^ Rpm
^ Vehicle speed
^ Shift
^ Gear
^ Range
^ Temperature
4. Vehicle must be at normal operating temperature.
5. Check transmission fluid level and condition.
6. Check for the following items:
^ Vehicle modifications
^ Electronic add-on items
^ Leaks
^ Linkage adjustments
7. Check TSBs for related information.
8. Perform complete On-Board Diagnostics (OBD) for both KOEO and KOER.
9. Record all DTCs.
10. Repair all non-transmission DTCs.
INSTALLATION PROCEDURES
Installing the Transmission Tester and TR Testing Cable "E" 418-107 (007-00111) or equivalent with Digital TR Sensor Overlay 007-00131 or equivalent at the transmission connector allows separation of the digital TR sensor electronics from the vehicle electronics.
Testing may cause additional fault codes to be set. Therefore, it is important that all DTCs are erased whenever repairs are made. To verify elimination of all codes, rerun OBD test.
1. For proper Digital TR Sensor Diagnosis follow Pinpoint Test D.
2. Disconnect vehicle harness at digital transmission TR sensor.
3. Set the two-way switch in the down position. (This switch will stay in the same position for all digital TR sensor testing.)
4. Attach the Digital TR sensor overlay 007-00131 or equivalent to the transmission tester.
Affixing the overlay will immobilize the two-way switch set in Step 2) so it cannot be accidentally moved to an incorrect setting during testing.
5. Select and connect interface cable "E" 418-F107 (007-00111) or equivalent to the tester and then black connector (Digital) to TR sensor.
6. Set Analog/Digital Switch on TR-E Cable to Digital.
CAUTION: Route all cables away from heat sources to prevent damage to cables during testing.
Use the transmission tester extender cable when running tests with the transmission on the vehicle.
7. Turn large dial to DIGITAL TR SENSOR TEST.
8. CAUTION: For resistance checks, be sure that the tester selector switch is set to the TR SENSOR TEST position or damage to the ohmmeter may result.
Plug transmission tester power cable into cigar lighter socket.
All LEDs should light for a short period and then turn off. This is the Tester's internal circuit check.
SENSOR TEST
CAUTION: Be sure that the DIGITAL 12 pin sensor cable connector (black) is used. If the wrong connection is made or the slide switch is in the wrong position, the LEDs on the TR cable will give false or no response during testing. This will cause the replacement of good parts.
1. Place transmission range selector lever into PARK.
2. Make sure that the "E" cable ANALOG/DIGITAL switch is set to DIGITAL.
3. Move the transmission range selector lever through all ranges.
4. Monitor the LEDs, located on the "E" cable, in each gear position. The LED should illuminate RED for the appropriate range selected.
5. If the LED for the applicable gear range position fails to illuminate RED or if it lights for a position other than the gear selected:
^ Verify test cable connections at sensor and tester.
^ Verify transmission shift linkage for proper adjustment.
^ Verify digital TR sensor for proper adjustment.
^ Retest.
6. If the sensor still fails to illuminate the LED RED for the selected gear range or indicates incorrect gear position, replace it.
SWITCH TESTS-PARK/NEUTRAL, BACKUP LAMP AND OPTIONAL CIRCUITS
NOTE: LED lights red when circuit is closed. LED turns off when circuit is open.
1. Press and hold each test button while moving the transmission range selector lever to each gear position.
2. Monitor each STATUS LED:
The LED in the appropriate gear position being testing should light red.
If the LED for the applicable gear position fails to light red, or if it lights for a position other than the gear selected:
^ Verify digital TR alignment.
^ Retest.
3. If the digital TR sensor fails, replace it.
After testing is finished, follow the Disconnecting The Tester procedure.
DISCONNECTING THE TESTER
1. CAUTION: Do not attempt to pry off connectors with a screwdriver. This will damage the connector and could result in a transmission concern.
Disconnect transmission tester from the digital TR sensor connector.
2. Reinstall vehicle wiring harness. Verify connection by pulling up on the harness.
3. Reinstall all heat shields that were previously removed.
4. Disconnect transmission tester power lead from vehicle.
5. Erase all DTCs.
6. Rerun On-Board Diagnostic Tests to receive a pass code.
7. Verify that the customer concern has been eliminated.