Actron GM Code Scanner CP9001 Manual do Utilizador Página 86
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SYSTEM 7: Kelsey-Hayes
RWAL
(Rear Wheel Anti-Lock)
1988 Blazer, C & K Series Pickup Truck, Sierra
1989 Astro, Blazer, C & K Series Pickup Truck, Jimmy,
S Series (2 WD) Pickup Truck, Safari, Sierra
1990 Astro, Blazer, C & K Series Pickup Truck,
G Series (RWD) Van, Jimmy, R & V Series Truck,
S & T Series Pickup Truck, Safari, Sierra, Suburban
1991 Astro, Blazer, C & K Series Pickup Truck,
G Series (RWD) Van, Jimmy, R & V Series Truck,
S & T Series Pickup Truck, Safari, Sierra, Suburban
1992 Astro, Blazer, C & K Series Pickup Truck,
G Series (RWD) Van, Jimmy,
S & T Series Pickup Truck, Safari, Sierra
1993 Blazer, C & K Series Pickup Truck, Jimmy,
S & T Series Pickup Truck, Sierra
1994 Blazer, C & K Series Pickup Truck,
S & T Series Pickup Truck
Diagnostic Circuit Check
Complete all steps before reading
trouble codes!
1) Block the wheels, and release the
parking brake. Do not step on the
service brake!
2)
Turn the ignition key to the ON
position, but do not start the engine.
Observe the
instrument panel
brake warning light:
• If the brake light
turns ON, and then OFF after about
2 seconds, the self-diagnostic
circuitry has found NO current
problems with the ABS system.
– DO NOT perform ABS code
reading procedure! A false code 9
will be stored in ABS computer
memory if the code reading steps
are followed when no faults currently
exist. (This is a quirk of the RWAL
ABS system.)
– Do this additional check: Step on
the service brake. If the brake
warning light comes ON, there is a
problem with the combination valve.
(This valve is part of the normal
braking system, not part of the anti-
lock braking system.) Release the
service brake.
• If the brake light turns ON and stays
ON (or turns ON after the bulb
check), proceed to the diagnostic
procedure outlined in your vehicle
service manual for the brake light
ON symptom.
• If the brake light stays OFF,
proceed to the diagnostic
procedure outlined in your vehicle
service manual for the brake light
OFF symptom.
• If the brake light is FLASHING,
proceed to READING ABS
CODES, page 85.
3) Turn the ignition key
to the OFF position.
- CODE SCANNER 1
- Engine/Transmission Section 3
- Anti-Lock Brake (ABS) Section 3
- CAUTION: 4
- About Codes 5
- ...or similar titles 6
- When to Read Codes 7
- Reading Codes 8
- At this point you can either: 10
- Using Codes 12
- • Cylinder compression: 13
- • Exhaust backpressure: 13
- • Air induction system: 13
- Car Computer Code Reader 15
- Code Meanings 16
- Saturn Transmission Codes 21
- Other Features 24
- Field Service Test Fuel 25
- Injected Engines Only 25
- Light flashes 26
- 2 times a second 26
- COMPUTER BASICS 27
- ACTUATORS 28
- Cold engine warm-up condition 29
- Hot engine cruise condition 29
- Computer controlled 31
- Other computer 31
- More information 32
- GLOSSARY 33
- Crankshaft or Camshaft 38
- Driveshaft 38
- Wheel Speed 38
- ABS BASICS 40
- ABS Types 41
- ABS Components 41
- Hydraulic Control Modulator 42
- Accumulator and Electric Pump 42
- Warning Light 43
- Lateral Acceleration Sensor 43
- Isolation valve is CLOSED 45
- (energized) 45
- Isolation valve is OPEN (not 45
- ABS SAFETY 46
- ABS TIPS 47
- READING CODES 49
- SYSTEM 1: Bosch 2S 53
- Reading ABS Codes Bosch 2S 54
- Example of code 12 only: 55
- • 1990 Corvette: 56
- • 1991 Corvette: 56
- (Manual listings on page 4.) 57
- SYSTEM 2: 58
- Bosch 2U (Version A) 58
- Functional Check 59
- Reading ABS Codes: 59
- Memory: Bosch 2U (Version A) 62
- SYSTEM 3: 64
- Bosch 2U (Version B) 64
- • 1992 Toronado, Trofeo: 65
- • 1993 Riviera: 65
- WARNING: Stay away from the 66
- Erasing ABS Codes from 68
- Computer Memory: 68
- SYSTEM 4: 70
- Bosch 2U (Version C) 70
- Memory: Bosch 2U (Version C) 73
- (Vehicles with 75
- Traction Control) 75
- (Vehicles without 75
- SYSTEM 5: 76
- Teves Mark II (Version A) 76
- Code 12 looks like: 78
- Code 23 looks like: 78
- Any three 79
- SYSTEM 6: 81
- Teves Mark II (Version B) 81
- (Rear Wheel Anti-Lock) 86
- Kelsey-Hayes RWAL 87
- Memory: Kelsey-Hayes RWAL 88
- SYSTEM 8: Kelsey-Hayes 90
- 4WAL (4 Wheel Anti-Lock) 90
- Memory: Kelsey-Hayes 4WAL 92
- GM Code Scanner Applications 96
- GM ABS Applications 97
- ONE (1) YEAR LIMITED WARRANTY 98
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