DTC C102B
Precautions: Precautions for ESP® · Precautions for Diagnosing Trouble · Test with Speedometer Tester or Other Equipment · Precautions for Brakes · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
C102B: Brake Booster Pressure Sensor System Malfunction Brake booster pressure sensor signal is out of specified range. |
•Brake booster pressure sensor
•Brake booster pressure sensor circuit •ESP® control module |
Circuit Diagram
| [A]: | ESP® control module connector (View: [a]) | A1: | Brake booster pressure sensor power supply circuit | 1. | Brake booster pressure sensor |
| [B]: | RBS model | A2: | Brake booster pressure sensor signal circuit | 2. | ESP® control module |
| [C]: | Non-RBS model | A3: | Brake booster pressure sensor ground circuit |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “ESP® System Check” performed?
|
Go to Step 2.
|
Go to ESP® System Check.
|
| 2 |
Brake booster pressure sensor power supply circuit check
1)With ignition “OFF”, disconnect brake booster pressure sensor connector.
2)Check for proper connection to brake booster pressure sensor connector.
3)If connections are OK, set ignition “ON”.
4)Check that voltage between “A1” and “A3” is approx. 5 V.
Is check result OK?
|
Go to Step 4.
|
Go to Step 3.
|
| 3 |
Brake booster pressure sensor ground circuit check
1)Check that voltage between “A1” and ground is approx. 5 V.
Is check result OK?
|
Repair or replace A3 circuit.
If this DTC is detected again, replace ESP® hydraulic unit / control module assembly and recheck DTC.
|
Repair or replace defective wire harness.
|
| 4 |
Brake booster pressure sensor signal circuit check
1)With ignition “OFF”, disconnect “E08” connector.
2)Check for proper connection to “E08” connector.
3)If connections are OK, check the following points.
•Resistance of “A2” circuit: less than 1 Ω
•Resistance between “A2” circuit and ground: infinity •Resistance between “A2” circuit terminal and other terminal at brake booster pressure sensor connector: infinity •Voltage of “A2” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 5.
|
Repair or replace defective wire harness.
|
| 5 |
Brake booster pressure sensor check
1)Check brake booster pressure sensor.
Is check result OK?
|
Replace ESP® hydraulic unit / control module assembly and recheck DTC.
|
Replace brake booster pressure sensor.
|