Code 53426, 33426 or 334B3

Cause Of Fault
Defective left rear outlet valve, break in continuity/ short-circuit to ground/ + 12 V in the wiring loom of the valve or defective Electronic Control Unit (ECU).

Symptom
The ANTI LOCK light is lit.

Action
1. With the ECU disconnected, check the circuit between pins 3 and 36 of the Antilock Brake System (ABS) ECU via the breakout box.
- The resistance should be 3-4 ohms.
- If the circuit is OK, clear the trouble code and test-drive the car to check whether the trouble code is triggered again.
If so, see Actions Before Replacing ECU.
- If the circuit is defective, continue as follows:
2. Check that the winding of the LRO valve is intact by measuring the resistance between pins 4 and 10 or 1 on the valve body.
- If the resistance is incorrect, fit a new hydraulic unit. If the resistance is now correct, the fault is in the wiring harness, go to step no. 3.
3. Check the blue and white wire between pin 4 on the connector of the valve body and pin 36 on the ABS ECU for a break in continuity/short-circuit.
4. Check the wire between pin 10 or 1 on the connector of the valve housing and pin 3 on the ABS ECU for a break in continuity/short-circuit.