The HECU makes the valve relay OFF, when the ignition switch is turned ON, but ON during its initial check.
The HECU checks the valve relay by checking the voltage of the valve power monitoring wire and comparing the signals from the valve relay. The HECU also checks continuity of the valve power monitoring wire.
This code shows in case that there is no continuity of the valve power monitoring wire.
DTC No | Condition | Possible Cause |
C2112 | - If the valve relay is switched on and the reference voltage of valve relay, less than 5±0.5V continuously for 56ms, the failure is detected. - If the valve relay is switched off and the reference voltage of valve relay, more than 6±0.5V continuously for 56ms, the failure is detected. - If the valve relay is switched off and all solenoid drivers are switched off and reference voltage of valve relay, less than 2.5±0.5V continuously for 56ms, , the failure is detected. | - Open/short in the value regal circuit - Faulty HECU |
The system stops. the ABS, TCS(ESP) and the EBD functions are inhibited. The ABS, TCS(ESP) and the EBD warning lamps are ON. The valve relay and all solenoids are OFF.
CHECK POWER SOURCE OF MOTOR.
Disconnect the connector from the HECU.
Measure the voltage between the terminals 9(+) and 8(-), 24(-) of the HECU connector.
Specification: Battery positive(+)
Is the voltage within the specification?
1) Check ABS fuse (10A) and fusible link (30A).
2) Check and repair harness or connector.
▶ Check circuit for conyinuty to ground.
CHECK CIRCUIT FOR CONTINUITY TO GROUND.
Disconnect the connector from the HECU.
Measure the resistance between terminals 8(-), 24(-) of the HECU connector and the body ground.
Is the resistance below 1Ω?
▶ Check and readjust the installing of the body ground.
▶ Test motor actuation by using hi-scan (pro)
TEST MOTOR ACTUATION BY USING HI-SCAN (PRO).
Is the sound of motor operating heard?
▶ Check repair, if necessary, harness and connector.
▶ Replace the HECU then reckeck.
