Problem Symptoms Table
WARNING: This page is about a different car, the 2006 Scion tC. However, it is still accessible from the selected car via links, so may be relevant.
Check the circuits for each problem symptom in the order given in the table below, and proceed to the relevant troubleshooting page.
HINT:
- Inspect each circuit in numerical order for the corresponding symptom.
If the malfunction still exists even after checking and confirming that all the circuits are normal, replace the brake actuator assembly.
- When a malfunction is found in the skid control ECU, replace the brake actuator assembly.
- When the tire pressure warning light blinks and the ABS warning light comes on, check the ABS system first.
PROBLEM SYMPTOMS
| Symptom | Suspected area | See Procedure |
|---|---|---|
| Tire pressure warning light does not come on after ignition switch is turned to the ON position. | 1. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY |
| 2. Combination meter assembly | COMBINATION METER | |
| 3. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| Tire pressure warning light remains on after ignition switch is turned to the ON position. HINT: System abnormal 1 is detected. Low pressure is detected. | 1. Check tire pressure and press the tire pressure warning reset switch for a few seconds. | - |
| 2. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 3. Combination meter assembly | COMBINATION METER | |
| 4. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| Tire pressure warning light blinks at 0.5 second intervals. HINT: System abnormal 2 is detected. | 1. Stop light switch circuit | DIAGNOSIS SYSTEM |
| 2. Vehicle speed sensor | METER | |
| 3. ABS system malfunction | ANTI-LOCK BRAKE SYSTEM | |
| Tire pressure warning light blinks at 0.25 second intervals. HINT: ECU requires initialization. | Initialize the tire pressure warning system | SYSTEM DESCRIPTION |
| ECU is initialized (tire pressure warning reset switch is ON), but tire pressure warning light comes on. | 1. Check tire pressure and press the tire pressure warning reset switch for a few seconds. | - |
| 2. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 3. Combination meter assembly | COMBINATION METER | |
| 4. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| Tire pressure warning light comes on while driving, then goes off without the tire pressure warning reset switch pressed. | 1. Check tire pressure warning light | TEST MODE PROCEDURE |
| 2. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 3. Combination meter assembly | COMBINATION METER | |
| 4. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| Tire pressure warning light comes on, but tire pressure is the specified value. | 1. Check if vehicle has the appropriate size tire. | - |
| 2. Ambient temperature sensor circuit | TIRE PRESSURE WARNING LIGHT CIRCUIT | |
| 3. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 4. Combination meter assembly | COMBINATION METER | |
| 5. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| HINT: Inappropriate size tires are used or the indicated tires are not used. Tire pressure is not adjusted at initialization. | ||
| Tire pressure warning light remains off, even when tire pressure decreased. | 1. Check if vehicle has the appropriate size tire. | - |
| 2. Ambient temperature sensor circuit | TIRE PRESSURE WARNING LIGHT CIRCUIT | |
| 3. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 4. Combination meter assembly | COMBINATION METER | |
| 5. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| HINT: Inappropriate size tires are used. Tire pressure may be affected by the driving environment. Since tire pressure decreases in cold weather, the pressure warning light may come on. Tire pressure is not adjusted at initialization. | ||
| Tire pressure warning light comes on while driving, even when the tire pressure warning reset switch is pressed. | 1. Press the tire pressure warning reset switch for a few seconds | - |
| 2. Check tire pressure warning light | TEST MODE PROCEDURE | |
| 3. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 4. Combination meter assembly | COMBINATION METER | |
| 5. Ambient temperature sensor circuit | TIRE PRESSURE WARNING LIGHT CIRCUIT | |
| 6. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR | |
| Test mode cannot be completed. | 1. Check tire pressure warning light | TEST MODE PROCEDURE |
| 2. Tire pressure warning light circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 3. Combination meter assembly | COMBINATION METER | |
| 4. Ambient temperature sensor circuit | TIRE PRESSURE WARNING LIGHT CIRCUIT | |
| 5. Tire pressure warning reset switch circuit | STOP LIGHT FUNCTIONS NORMALLY | |
| 6. TS and CG terminal circuit | BRAKE CONTROL | |
| 7. Brake actuator assembly (Skid control ECU) | BRAKE ACTUATOR |