Steering Column Switches - Steering Column Switches

Diagnosis and Testing

Inspection and Verification

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Electrical
Fuse(s). Wiring harness. Electrical connector(s). Switch(es). Battery.

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

4. If the cause is not visually evident, verify the symptom and refer to the Sympton Chart.

Symptom Chart

Symptom	Possible Sources	Action
The ignition switch is inoperative	* Ignition switch.	* CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams.
	* Circuit(s).	* GO to Pinpoint Test A.
No power in ACC	* Ignition switch.	* CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams.
	* Circuit(s).	* GO to Pinpoint Test B.
No power in RUN	* Ignition switch.	* CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams.
	* Circuit(s).	* GO to Pinpoint Test C.
No power in START	* Ignition switch.	* CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams
	* Circuit(s).	* GO to Pinpoint Test D.
The multifunction switch does not operate correctly	* Switch(es). * Circuit(s).	* REFER to: Turn Signal, Cornering and Hazard Lamps (417-01 Exterior Lighting, Diagnosis and Testing), Headlamps (417-01 Exterior Lighting, Diagnosis and Testing), Wipers and Washers (501-16 Wipers and Washers, Diagnosis and Testing).

Pinpoint Test

NOTE: Use a digital multimeter for all electrical measurements.

PINPOINT TEST A : THE IGNITION SWITCH IS INOPERATIVE
TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
A1: CHECK THE IGNITION SWITCH ELECTRICAL CONNECTOR
	1 Remove the steering column shrouds.
	2 Check the ignition switch electrical connector.
	Is the ignition switch electrical connector clean and secure? Yes GO to A2. No CLEAN and SECURE the ignition switch electrical connector. TEST the system for normal operation.
A2: CHECK FOR VOLTAGE ON CIRCUIT SBP24A (VT/RD)
	1 Disconnect Ignition Switch C2DC32.
	2 Measure the voltage between the ignition switch C2DC32 Pin 4, circuit SBP24A (VT/RD), harness side and ground.
	Is the voltage greater than 10 volts? Yes VERIFY the customers concern. No REPAIR the circuit SBP24A (VT/RD). TEST the system for normal operation.

PINPOINT TEST B : NO POWER IN ACC
TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
B1: CHECK FOR VOLTAGE ON CIRCUIT SBP24A (VT/RD)
	1 Disconnect Ignition Switch C2DC32.
	2 Measure the voltage between the ignition switch C2DC32 Pin 4, circuit SBP24A (VT/RD), harness side and ground.
	Is the voltage greater than 10 volts? Yes REPAIR circuit CDC33A (VT/GN). TEST the system for normal operation. No REPAIR circuit SBP24A (VT/RD). TEST the system for normal operation.

PINPOINT TEST C : NO POWER IN RUN
TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
C1: CHECK FOR VOLTAGE ON CIRCUIT SBP24A (VT/RD)
	1 Disconnect Ignition Switch C2DC32.
	2 Measure the voltage between the ignition switch CDC32 Pin 4, circuit CDC33A (VT/GN), harness side and ground.
	Is the voltage greater than 10 volts? Yes REPAIR the circuit CDC32D (BN/YE). TEST the system for normal operation. No REPAIR the circuit SBP24A (VT/RD). TEST the system for normal operation.

PINPOINT TEST D : NO POWER IN START
TEST CONDITIONS	DETAILS/RESULTS/ACTIONS
D1: CHECK FOR VOLTAGE ON CIRCUIT SBP24A (VT/RD)
	1 Disconnect Ignition Switch CDC32.
	2 Measure the voltage between the ignition switch CDC32 Pin 4, circuit SBP77B (RD/GY) harness side and ground.
	Is the voltage greater than 10 volts? Yes REPAIR circuit CDC35F (BU/WH). TEST the system for normal operation. No REPAIR circuit SBP24A (VT/RD). TEST the system for normal op