1.
CHECK INSTALLING OF PRESSURE SENSOR
(1)
Check if the pressure sensor is properly installed on the master cylinder.
Is the pressure sensor installed properly?
▶ Reinstall the pressure sensor properly.
▶ Check power of pressure sensor
Master cylinder pressure sensor is used for detecting the pressure delivered to wheels when the brake system is working.
This code shows in case that there is an open or short in the circuit of the pressure sensor.
DTC No. | Detecting Condition | Possible Cause |
C1235 | 1. When VMCP > 4.8V or VMCP < 0.2V continue 1second, 2. The Monitoring starts 1 sec after Power Up. | - Open/Short in the pressure sensor circuit - Faulty the pressure sensor - Faulty installing of the pressure sensor - Faulty HECU |
The ESP function is inhibited, while the ABS and EBD controls allowed.
The ESP warning lamp is ON, but the ABS and EBD warning lamps OFF.
CHECK INSTALLING OF PRESSURE SENSOR
Check if the pressure sensor is properly installed on the master cylinder.
Is the pressure sensor installed properly?
▶ Reinstall the pressure sensor properly.
▶ Check power of pressure sensor
CHECK POWER OF PRESSURE SENSOR
Disconnect the pressure sensor connector, and measure the voltage between terminals 1(-) and 3(+) of the pressure sensor connector.
Specification : 4.8~5.2 V
Is the voltage within the specification?
▶ Check harness and connector between the HECU and the pressure sensor.
▶ Check output voltage of pressure sensor
CHECK OUTPUT VOLTAGE OF PRESSURE SENSOR
Measure the voltage between terminal 2 of the pressure sensor connector and the body ground.
Specification : 0.5~4.5V
Is the output voltage within the specification?
▶ Check harness and connector of the pressure sensor. If no error on the harness and the connector, replace the pressure sensor and recheck.
▶ Check output voltage of HECU connector
CHECK OUTPUT VOLTAGE OF HECU CONNECTOR
Measure the voltage between terminal 12 of the HECU connector and the body ground.
Specification : 0.5~4.5V
Is the voltage within the specification?
▶ Repair harness and connector between the HECU and the pressure sensor.
▶ After clearing the DTC and driving the vehicle at 40Km/h speed or more, if the ESP lamp is ON and the same DTC shows again, replace the HECU and recheck.
