|DTC Code||DTC Name|
|C120B||IG Supply Voltage Low|
|DTC No.||Detection Item||DTC Detection Condition||Trouble Area||Note|
|C120B||IG Supply Voltage Low||Master cylinder pressure sensor power supply voltage decrease occurs or history of voltage decrease exists, and defective master cylinder pressure sensor output continues for 1 second or more.||
Refer to DTC C1241.
CAUTION / NOTICE / HINT
When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.
Inspect the fuses for circuits related to this system before performing the following procedure.
CHECK HARNESS AND CONNECTOR (+BS TERMINAL)
Make sure that there is no looseness at the locking part and the connecting part of the connector.
Disconnect the A9 skid control ECU (brake actuator assembly) connector.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)
Reconnect the A9 skid control ECU (brake actuator assembly) connector.
Clear the DTCs.
Check if the same DTC is output.
USE SIMULATION METHOD TO CHECK Click here