My ABS light has been intermittant for a while now so I'm going through the shop manual and trying to diagnose the problem with the system.
Symptoms: Nothing other than the ABS light comes on after putting the car in gear and driving.
Troubleshooting using the service manual section 35-27. Note the 1995 VR4 ABS system fault codes cannot be read without a MUT III tester. Therefore the troubleshooting will focus on verifying the components and running component tests:
1) Verified the ABS warning light does function. It flashes a few times after the key is turned ON which is normal.
2) Check the wheel speed sensor resistance values. For this test I pulled the passenger side rear panel and pulled the ABS ECU so I could tap into the connector and run the tests.:
Using the figure on 35-40
Front Left (pins 14/15) reads 1.05K
Front Right (pins 33/31) reads 1.06K
Rear Left (pins 11/10) reads 1.06K
Rear Right (pins 30/28) reads 1.06K
Standard value is 0.8 - 1.2K so all of these are normal and all wheel speed sensors are good
3) Valve Relay test using the figure on page 35-46
The resistance across terminals 2 and 27 reads 105 ohms. This is in the standard range so the Valve Relay is good.
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