B2366

Step 1: Perform visual inspection of the IP power sliding door switch and its connector for signs of damage, corrosion, moisture intrusion, or burnt terminals. Disconnect the switch connector and inspect both male and female terminals closely.

Step 2: With switch disconnected and ignition off, use a digital multimeter to measure resistance between the switch circuit wire(s) at the harness connector and known good chassis ground. Reading should be infinite (open circuit); any continuity indicates a short to ground in the wiring.

Step 3: If harness shows short to ground, systematically disconnect connectors along the circuit path from switch to BCM while monitoring resistance to isolate the fault location. Inspect wire routing at common pinch points (door jambs, behind dash, firewall penetrations).

Step 4: If harness tests good, test the switch itself by measuring resistance across switch terminals in various positions per manufacturer specifications. A dead short (near 0 ohms) to the ground terminal indicates failed switch.

Step 5: If both harness and switch test good, suspect BCM internal fault. Use bidirectional controls via scan tool to command power sliding door functions while monitoring switch input values to verify BCM is correctly interpreting circuit voltage.

Step 6: After repair (replace switch, repair wiring, or replace BCM as diagnosed), clear codes, cycle the switch through all positions multiple times, and verify code does not return. Test actual power sliding door operation from IP switch.