Equus 3123 - GM Code Reader (1982 - 1995) - Manual (Page 28)

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3-3 GM
2. After retrieving ABS fault codes, erase codes using the
appropriate procedures for your vehicle and ABS system
(paragraph 3.4).
3. Repeat the procedure to retrieve ABS fault codes (step 1,
above).
NOTE: It may be necessary to perform a thorough test drive
to reset some fault codes.
4. In most cases, codes which reappear indicate "hard"
faults. Codes which DO NOT reappear are usually
"intermittent" faults.
5. Follow the testing and repair procedures outlined in the
manufacturer's service manual for your vehicle to correct
"hard" faults. Codes should be addressed and eliminated
in the order they were received, erasing and retesting
after each repair is made to be sure the fault was
eliminated.
3.3.1 Retrieving Service Codes for Teves II Systems
1. Turn on ignition. DO NOT START THE ENGINE.
Observe "Anti-Lock" light:
■ If "Anti-Lock" light turns off within 30 seconds, no
ABS service codes have been stored.
■ If "Anti-Lock" light remains on longer than 30
seconds, continue to step 2 to retrieve ABS service
codes.
2. Turn off ignition.
3. Connect the Code Reader to the vehicle test connector.
NOTE: The Code Reader only fits into the connector one way.
4. Set Selector Switch to ABS A-H
position.
5. Turn on ignition. DO NOT
START THE ENGINE.
6. Read codes from the "Anti-Lock"light on your vehicle's
instrument panel. Be sure to write the codes down.
NOTE: If the light does not blink, refer to your vehicle's
service manual for information on checking the
circuitry.