ABS - Problem Code 1 Diagnostic Tips

ABS Problem Code 1:
'92 Model Tips

Here are some additional diagnostic steps to use on any '92 model with ABS problem code 1. Use these steps first to determine if you need to go through the S/M troubleshooting flowchart.

1. Connect the service check connector terminals with a jumper wire and turn the ignition switch on. Watch the ABS light as it blinks the codes and write them down.

^ If code 1 is indicated, go to step 2.

^ If any other codes are indicated, go to the appropriate S/M troubleshooting.

2. Connect the ALB Checker and perform the Function Test as described in the S/M.

^ If the system checks OK through the Function Test (ABS light stays off), clear the codes and test drive the car to operate the ABS. If the ABS works OK (ABS light stays off), the cause of the code 1 has corrected itself. Return the car to the customer.

^ If the ABS light comes on during the Function Test, go to step 3.

3. Run through Mode 1 with the ALB Checker.

^ If the pump runs for 20 seconds and the ABS light comes on, go to step 4.

^ If the pump doesn't run, but the ABS light comes on after 20 seconds, go to the Problem Code 1 troubleshooting in the S/M.

4. Remove the fluid from the modulator reservoir with a syringe, then remove the reservoir from the modulator to expose the solenoids. Leave the supply hose attached to the reservoir and lay the reservoir off to the side on some shop towels.

5. Support the reservoir on end with the supply hose down. Pour a little brake fluid into the reservoir to supply the pump. Run through Mode 1 with the ALB Checker. While the pump runs, watch the tops of the solenoids.

^ If there's fluid coming from any of the solenoids, you'll have to replace the modulator assembly since solenoids are not available separately yet.

^ If there's no fluid coming from the solenoids and the pump stops after 20 seconds, replace the pump.