Equus 3123 - GM Code Reader (1982 - 1995) - Manual (Page 34)

3
3-9 GM
7. The ""Service ABS" light should display code 12
continuously. If any other codes are displayed, repeat
steps 1 through 6.
8. Turn off ignition.
3.4.5 Erasing Service Codes for Bosch 2U Systems
1. Turn on ignition and observe "Anti-Lock" light. "Anti-
Lock" light should turn off within 3 to 4 seconds. If "Anti-
Lock" light remains on, a fault is still present.
NOTE: Service codes cannot be erased until all stored service
codes have been retrieved.
2. Set Selector Switch to ABS A-H
position.
3. Connect the Code Reader to the
vehicle test connector and
observe "Anti-Lock" light.
4. When "Anti-Lock" light turns on, disconnect Code Reader.
5. When "Anti-Lock" light turns off, reconnect Code Reader
and observe "Anti-Lock" light. When "Anti-Lock" light
turns on, disconnect Code Reader.
6. Repeat step 5.
7. When "Anti-Lock" light turns off, reconnect Code Reader.
"Anti-Lock" light will turn on. Disconnect Code Reader.
All service codes are now cleared.
8. Turn off ignition.
9. Repeat procedure for retrieving service codes (paragraph
3.3.4) to make sure codes have been erased.
3.5 ABS SERVICE CODES
• Consult your vehicle's service manual for detailed
meaning related to your vehicle.
Determine your vehicle's ABS Type (paragraph 3.2) and refer
to the appropriate service codes table:
Teves II Paragraph 3.5.1
Kelsey-Hayes RWAL Paragraph 3.5.2
Kelsey-Hayes 4WAL Paragraph 3.5.3
Bosch 2S Paragraph 3.5.4
Bosch 2U Paragraph 3.5.5