Steering Column Switches - Steering Column Switches
Diagnosis and Testing
Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
| Electrical |
|---|
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- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- 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
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
| |
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