| Diagnosis and Testing Refer to Wiring Diagrams Section 700-02, for schematic and connector information. Inspection and Verification - Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart | Electrical | | Fuse(s) | | Wiring harness | | Loose or corroded connector(s) | | Switch(es) | | Battery | - 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 Symptom 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 ??. . | | No power in ACC | * Ignition switch. | * CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams. | | * Circuit(s). | * GO to Pinpoint Test ??. . | | No power in RUN | * Ignition switch. | * CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams. | | * Circuit(s). | * GO to Pinpoint Test ??. . | | No power in START | * Ignition switch. | * CARRY OUT the Ignition Switch Component Test. REFER to the Wiring Diagrams. | | * Circuit(s). | * GO to Pinpoint Test ??. . | | The multifunction switch does not operate correctly | * Switch(es). | * * | | * Circuit(s) | * * | Pinpoint Tests 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 BETWEEN THE BATTERY JUNCTION BOX (BJB) AND THE IGNITION SWITCH | | | 1 Disconnect Fuse 106 (110A). | | | 2 Disconnect Ignition Switch C264. | | | 3 Connect Fuse 106 (110A). | | | 4 Measure the voltage between the ignition switch C264 pin 7, circuit (RD/YE), harness side and ground. | | | Is the voltage greater than 10 volts? Yes VERIFY the customers concern. No REPAIR circuit (RD/YE). TEST the system for normal operation. | | PINPOINT TEST B : NO POWER IN ACC | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK FOR VOLTAGE BETWEEN THE BATTERY JUNCTION BOX (BJB) AND THE IGNITION SWITCH | | | 1 Disconnect Fuse 106 (110A). | | | 2 Disconnect Ignition Switch C264. | | | 3 Connect Fuse 106 (110A). | | | 4 Measure the voltage between the ignition switch C264 pin 7, circuit (RD/YE), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit (RD/YE). TEST the system for normal operation. | | PINPOINT TEST C : NO POWER IN RUN | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK FOR VOLTAGE BETWEEN THE BATTERY JUNCTION BOX (BJB) AND THE IGNITION SWITCH | | | 1 Disconnect Fuse 106 (110A). | | | 2 Disconnect Ignition Switch C264. | | | 3 Connect Fuse 106 (110A). | | | 4 Measure the voltage between the ignition switch C264 pin 7, circuit (RD/YE), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit (RD/YE). TEST the system for normal operation. | | PINPOINT TEST D : NO POWER IN START | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: CHECK FOR VOLTAGE BETWEEN THE BATTERY JUNCTION BOX (BJB) AND THE IGNITION SWITCH | | | 1 Disconnect Fuse 106 (110A). | | | 2 Disconnect Ignition Switch C264. | | | 3 Connect Fuse 106 (110A). | | | 4 Measure the voltage between the ignition switch C264 pin 7, circuit (RD/YE), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit (RD/YE). TEST the system for normal operation. | |
