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Test 13A - No Response From Central Timer Module (CTM)

NOTE: For connector terminal identification see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  . Perform, after each repair, VERIFICATION TEST VER-1A - VERIFICATION PROCEDURE  .
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 TEST 13B  . If fuse is okay, go to next step.
  2. Install fuse No. 11. Remove and inspect fuse No. 6 from junction block. If fuse is open, go to TEST 13C  . If fuse is okay, go to next step.
  3. Install fuse No. 6. Disconnect Central Timer Module (CTM). CTM is located behind right corner of dash, behind glove box. Using external ohmmeter, measure resistance between ground and terminal No. 3 (Black wire) on CTM "B" connector. If resistance is more than 5 ohms, repair open Black wire. If resistance is 5 ohms or less, go to next step.
  4. Measure resistance between ground and terminal No. 6 (Black/Tan wire) on CTM "A" connector. If resistance is more than 5 ohms, repair open Black/Tan wire. If resistance is 5 ohms or less, go to next step.
  5. Turn ignition on. Using scan tool, perform CCD Bus test. Connect jumper wire between ground and terminal No. 16 (Violet/Brown wire) on CTM connector "B". If scan tool does not display BUS SHORT TO GROUND, repair open Violet/Brown wire. If scan tool displays BUS SHORT TO GROUND, go to next step.
  6. Disconnect jumper wire. Connect jumper wire between ground and terminal No. 17 (White/Black wire) on CTM "B" connector. If scan tool does not display BUS SHORT TO GROUND, repair open White/Black wire. If scan tool displays BUS SHORT TO GROUND, replace CTM.
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