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Home >> Cadillac >> 1999 >> Seville SLS >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Modules >> Diagnostic Tests >> DTC U1162: Loss Of Rear Driver Door Module SBI >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform DATA LINK COMMUNICATIONS DIAGNOSTIC SYSTEM CHECK  under SYSTEM TESTS. Go to next step.
  2. If DTCs U1161, U1163 and U1170 are also present, go to DTC U1170: LOSS OF DRIVER DOOR SWITCH SBI  . If only DTC U1162 is present, go to next step.
  3. Check for open in Tan/White wire between door modules and door switches. See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS. If faulty circuit is found and repaired, go to step  6 . If circuit is okay, go to next step.
  4. Check power and ground circuits going to LRDM for opens or shorts. See appropriate wiring diagram in POWER DISTRIBUTION or GROUND DISTRIBUTION article in WIRING DIAGRAMS. If faulty circuit is found and repaired, go to step  6 . If circuit is okay, go to next step.
  5. Replace Left Rear Door Module (LRDM). After repairs, go to next step.
  6. Turn ignition switch to OFF position. Reconnect components and connectors. Turn ignition switch to ON position. Using scan tool, clear DTCs. After clearing DTCs, perform DATA LINK COMMUNICATIONS DIAGNOSTIC SYSTEM CHECK  under SYSTEM TESTS.
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