Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL
INSPECT BRAKE ACTUATOR ASSEMBLY
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR ASSEMBLY)
DTC C1225/25 SM Solenoid Circuit
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
| C1225/25 | When any of the following is detected: While switching solenoid (SM1 or SM2) ON is being output, overcurrent continues for 0.05 seconds or more. While switching solenoid (SM1 or SM2) OFF is being output, an open circuit continues for 0.05 seconds or more. While switching solenoid (SM1 or SM2) ON is being output, an open circuit continues for 0.1 seconds or more. While switching solenoid (SM1 or SM2) OFF is being output, current continues to be applied for 0.1 seconds or more. Short to GND in the switching solenoid (SM1 or SM2) continues for 0.1 seconds or more. Switching solenoids SM1 and SM2 are shorted for 0.1 seconds or more. | SM1 or SM2 circuit Skid control ECU |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When replacing the skid control ECU, perform zero point calibration and store system information .
| 1.INSPECT BRAKE ACTUATOR ASSEMBLY |
Disconnect the brake actuator connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition 13 (SM1+) - 14 (SM1-) Always 8.1 to 9.1 Ω
at 25°C (77°F)14 (SM1-) - Body ground Always 10 kΩ or higher 15 (SM2+) - 16 (SM2-) Always 8.1 to 9.1 Ω
at 25°C (77°F)16 (SM2-) - Body ground Always 10 kΩ or higher
|
| ||||
| OK | |
| 2.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR ASSEMBLY) |
Disconnect the skid control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition J78-25 (SM1+) - A13-13 (SM1+) Always Below 1 Ω J78-25 (SM1+) - Body ground Always 10 kΩ or higher J78-12 (SM1-) - A13-14 (SM1-) Always Below 1 Ω J78-12 (SM1-) - Body ground Always 10 kΩ or higher J78-11 (SM2+) - A13-15 (SM2+) Always Below 1 Ω J78-11 (SM2+) - Body ground Always 10 kΩ or higher J78-24 (SM2-) - A13-16 (SM2-) Always Below 1 Ω J78-24 (SM2-) - Body ground Always 10 kΩ or higher
|
| ||||
| OK | |
| 3.RECONFIRM DTC |
Reconnect the skid control ECU connector and the brake actuator connector.
Clear the DTC .
Start the engine.
Check if the same DTC is recorded .
- Result:
Condition Proceed to DTC (C1225/25) is not output A DTC (C1225/25) is output B
- HINT:
If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU and brake actuator assembly. Make sure that no DTCs are output.
If any DTCs are output while jiggling a connector or wire harness of the skid control ECU and brake actuator assembly, inspect and repair the connector or wire harness.
|
| ||||
| A | ||
| ||