Test 8A: No Response From OTIS Module
NOTE:
For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1
after each repair.
CAUTION:
Always turn ignition off prior to disconnecting any module connector.
- Turn ignition off. Disconnect Overhead Travel Information System (OTIS) module 6-pin connector. OTIS module is mounted to headliner. Using external ohmmeter, measure resistance between ground and OTIS module 6-pin connector terminal No. 3 (Black/Light Green wire). If resistance is 10 ohms or more, repair open Black/Light Green wire. If resistance is less than 10 ohms, go to next step.
- Turn ignition on. Using external voltmeter, measure voltage between ground and OTIS module 6-pin connector terminal No. 2 (Dark Blue/White wire). If voltage is 10 volts or less, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
- Measure voltage between ground and OTIS module 6-pin connector terminal No. 5 (Violet/Yellow wire). If voltage is more than .5 volt, replace OTIS module. If voltage is .5 volt or less, go to next step.
- Disconnect junction block headliner connector C11. See Fig 1 . Measure voltage between ground and junction block headliner connector C11 terminal No. 4 (Violet/Yellow wire). If voltage is .5 volt or less, repair open Violet/Yellow wire between junction block and OTIS module. If voltage is more than .5 volt, go to next step.
- Disconnect Body Control Module (BCM). BCM is connected to junction block. Ensure junction block 20-pin internal connector pins are not damaged, repair as necessary. If 20-pin internal connector is okay, replace BCM.