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B160B-PANEL DIMMER INPUT CIRCUIT HIGH (SCM) For the Instrument Cluster circuit diagram (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - SCHEMATICS For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes LIGHTING MULTI-FUNCTION SWITCH STEERING CONTROL MODULE Diagnostic Test 1. INTERMITTENT CONDITION Turn the ignition on. With the Scan Tool, clear all SCM DTC’s. Turn the Panel Illumination ON then OFF. With the Scan Tool, read the SCM DTC’s. Does the Scan Tool read: B160B-PANEL DIMMER INPUT CIRCUIT HIGH? Yes >> Go To 2 No >> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON- 2. MULTIFUNCTION SWITCH Turn the ignition off. Using the correct service procedure, remove the Lighting Multi-Function Switch. Measure the internal resistance of the Multifunction Switch between cavities 10 and 11. Move the switch position DOME DEFEAT = 0 ohms DIM 1 = 118 ohms DIM 2 = 224 ohms DIM 3 = 450 ohms DIM 4 = 1099 ohms DIM 5 = 1099 ohms DIM 6 = 1099 ohms PARADE = 1099 ohms DOME LAMPS = 1099 ohms Is the resistance in each position correct? Yes >> Go To 3 No >> Replace the Multifunction Switch in accordance with the service information. Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON- 8J - 22 INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS WK |