A1

A1 MEASURE THE VALVE RESISTANCE AT THE HYDRAULIC CONTROL UNIT (HCU)

- Disconnect the 8-pin connector from the HCU.

- Measure the resistance between the following on the component side of the 8-way:

- Pin 1, Pin 4 and Pin 2 (RA inlet) 5-8 Ohms.
- Pin 1, Pin 4 and Pin 3 (RA outlet) 3-6 Ohms.
- Pin 1, Pin 4 and Pin 5 (FR inlet)5-8 Ohms.
- Pin 1, Pin 4 and Pin 6 (FR Outlet) 3-6 Ohms.
- Pin 1, Pin 4 and pin 7 (FL inlet) 5-8 Ohms.
- Pin 1, Pin 4 and Pin 8 (FL Outlet) 3-6 Ohms.

NOTE: The valve resistance will change rapidly. While monitoring the valve coil resistance, tap the anti-lock HCU lightly with a rubber mallet to simulate conditions of rough road driving.

Does the resistance on any valve move out of specification at any time?

> Yes
High or low valve resistance detected. Replace the HCU.

Perform the ABS bleed procedure with a bleeder box. Service and Repair

Go to Pinpoint Test A5. A5

> No
Go to Pinpoint Test A2. A2