General DTC Information

4-4-4 No Power Supply To Valves In Hydraulic Unit

Diagnostic trouble code (DTC) information

Conditions for DTC





When the ignition is switched on, control module #33 and #53 is supplied with power. Then #3 records the supply, which means that the power supply to the solenoid valves is OK. If the control module does not detect any supply at #3, it posts DTC 4-4-4.

Substitute value
- ABS/TRACS cuts out.

Sources of fault
- Open circuit in lead for reference supply to control module #3 or short-circuited to ground.
- Open circuit in power supply to hydraulic unit solenoid valves from combination relay (terminal 9).
- Open circuit in power supply to combination relay (terminal 4).
- Open circuit in signal lead (terminal 12 on combination relay) to combination relay main relay.
- Signal lead (terminal 12 on combination relay) to combination relay main relay, short-circuited to supply.
- Open circuit in power supply to combination relay main relay (terminal 3 on combination relay).
- Power supply to control module from combination relay (terminal 10), short-circuited to ground.
- Faulty combination relay.
- Faulty hydraulic unit.
- Contact resistance in terminals.

Symptoms
- None.

Start fault-tracing at EM1 Checking Status [EM1]