C1604

DTC C1604 ECU Hardware Error

C1604:

DTC Detecting Condition

Failsafe Function
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.

Inspection Procedure
1. CHECK CIRCUIT FOR CONTINUITY BETWEEN THE HECU AND BODY GROUND.

Voltmeter Connected To HECU:

Measure the resistance between terminals 8(-), 24(-) of the HECU connector and the body ground.
Is the resistance below 1 Ohms?
NO
- Check and readjust the installing of the body ground.
YES
- After cleaning the DTC and driving the vehicle at 40 km/h speed or more, if the ABS warning lamp is ON and the same DTC shows again, replace the HECU and recheck.