Equus 3123 - GM Code Reader (1982 - 1995) - Manual (Page 32)

3
3-7 GM
3.4 ERASING SERVICE CODES
• Always observe safety precautions before and during
testing process.
• Erase codes only when all repairs have been completed.
Determine your vehicle's ABS Type (paragraph 3.2) and erase
codes using the appropriate procedures:
3.4.1 Teves II
3.4.2 Kelsey-Hayes RWAL
3.4.3 Kelsey-Hayes 4WAL
3.4.4 Bosch 2S
3.4.5 Bosch 2U
3.4.1 Erasing Service Codes for Teves II Systems
1. Drive vehicle at a speed greater than 20 MPH. Service
codes will automatically be cleared.
2. Repeat procedure for retrieving service codes (paragraph
3.3.1) to make sure codes have been erased and no new
codes have been recorded.
3.4.2 Erasing Service Codes for Kelsey-Hayes RWAL Systems
A. For all vehicle models EXCEPT "C" and "K" 3500 Series
Heavy Duty (HD) (1992-93):
1. Turn off ignition.
2. Remove STOP/HAZARD fuse from fuse block.
3. Wait 20 seconds, then reinstall STOP/HAZARD fuse.
4. Repeat steps 2 and 3 for each code stored. For example: if
four codes were retrieved, remove and install
STOP/HAZARD fuse four times.
5. Repeat procedure for retrieving service codes (paragraph
3.3.2) to make sure codes have been erased.
B. For "C" and "K" 3500 Series Heavy Duty (HD) (1992-93)
vehicles ONLY:
1. Turn off ignition.
2. Remove STOP/HAZARD fuse from fuse block.
3. Turn on ignition and observe
"Brake" light. If "Brake" light is
on, a code(s) is stored.
4. Set Selector Switch to ABS A-H
position.