Shift Indicator - A/T: Testing and Inspection
Indicator Input Test1. If the MIL has been reported on, check for a DTC, and repair the system as indicated by DTC.
2. If the MIL does not come on, and A/T gear position indicator P, R, or N does not come on, remove the gauge assembly from the dashboard, then disconnect the gauge assembly connector A (22P) and B (18P).
3. Inspect the connectors and connector terminals to be sure they are making good contact.
4. If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
5. Turn the ignition switch ON (II).
6. Shift to the P position, and check the voltage between A20 terminal (BLU/BLK) and ground. There should be 0 V in the P position and battery voltage in any other shift lever position. If the test results are different, check for faulty transmission range switch or an open in the wire.
7. Shift to the R position, and check the voltage between A19 terminal (WHT) and ground. There should be 0 V in the R position and battery voltage in any other shift lever position. If the test results are different, check for faulty transmission range switch or an open in the wire.
8. Shift to the N position, and check the voltage between A17 terminal (BLK/RED) and ground. There should be 0 V in the N position and battery voltage in any other shift lever position. If the test results are different, check for faulty transmission range switch or an open in the wire.
9. Check the voltage between B7 terminal (YEL) and ground. There should be battery voltage. If the test result is different, check for a blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box or an open in the wire.
10. Turn the ignition switch OFF, and check for continuity between B17 terminal and ground. There should be continuity under all conditions. If the test result is different, check for a poor ground (G401) or open in the wire.
11. If all input tests prove OK, but the indicator is faulty, replace the printed circuit board.