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Home >> Jeep >> 1998 >> Cherokee Classic, 2.5 P >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Vehicle Communications) >> Identifying Vehicle Communication Problems >> No Response Compass/Mini-Trip System

No Response Compass/Mini-Trip System

WARNING: This page is about a different car, the 1999 Dodge Pickup and 1999 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
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.
  1. Remove and inspect fuse No. 11 from junction block. Junction block is on left side of instrument panel. If fuse is open, go to next step. If fuse is okay, go to step  3 .
  2. Using external ohmmeter, measure resistance between ground and fused ignition switch output run/start terminal (Dark Blue/White wire) on fuse No. 11 socket. If resistance is less than 5 ohms, repair Dark Blue/White wire for short to ground. Replace fuse No. 11. If resistance is 5 ohms or more, replace fuse No. 11.
  3. Reinstall fuse. Disconnect CMTC 12-pin connector. Turn ignition on. Using external voltmeter, measure voltage between ground and CMTC connector terminal No. 1 (Dark Blue/White wire). If voltage is less than 9.5 volts, repair open Dark Blue/White wire. If voltage is 9.5 volts or more, go to next step.
  4. Using external voltmeter, measure voltage between ground and CMTC connector terminal No. 5 (Pink wire). If voltage is less than 9.5 volts, repair open Pink wire. If voltage is 9.5 volts or more, go to next step.
  5. Turn ignition off. Using external ohmmeter, measure resistance between ground and CMTC connector terminal No. 7 (Black/Light Green wire). If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open Black/Light Green wire.
  6. Using scan tool, perform CCD bus test. Connect jumper wire between ground and CMTC connector terminal No. 2 (Violet/Brown wire). If scan tool displays BUS (+) SHORTED TO GROUND, go to next step. If scan tool does not display BUS (+) SHORTED TO GROUND, repair open Violet/Brown wire.
  7. Move jumper wire to CMTC connector terminal No. 8 (White/Black wire). If scan tool displays BUS (+) SHORTED TO GROUND, replace CMTC. If scan tool does not display BUS (+) SHORTED TO GROUND, repair open White/Black wire.
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