Scheme 1
- G sensor
- Rear ABS wheel speed sensor RH
- Adjusting spacer
- Rear ABS wheel speed sensor LH
- Front ABS wheel speed sensor LH
- Front ABS wheel speed sensor RH Tightening torque: Nm (kgf-m, ft-lb) T1: 18 (1.8, 13.0) T2: 33 (3.3, 24)
Scheme 2
- (1) ABS control module and hydraulic control unit (ABSCM&H/U)
- (6) Primary inlet
- (7) Secondary inlet Tightening torque: Nm (kgf-m, ft-lb) T1: 7.5 (0.76, 5.5)
Checking Hydraulic Unit ABS Operation By Pressure Gauge
Lift-up the vehicle and remove the wheels.
Disconnect the air bleeder screws from the FL and FR caliper bodies.
Connect two pressure gauges to the FL and FR caliper bodies.
| IMPORTANT | Pressure gauges used exclusively for brake fluid must be used. Do not employ pressure gauge previously used for transmission oil pressure since the piston seal is expanded which may lead to malfunction of the brake. |
Note. Wrap sealing tape around the pressure gauge.
Scheme 3
Bleed air from the pressure gauges.
Perform the ABS sequence control.
When the hydraulic unit begins to work and first the FL side performs decompression, holding and compression, and then the FR side performs decompression, holding and compression.
Read values indicated on the pressure gauge and check if the fluctuation of the values between decompression and compression meets the standard values. Also check if any irregular brake pedal tightness is felt.
| Front wheel | Rear wheel | |
|---|---|---|
| Initial value | 3,500 kPa (35 kgf/cm 2 , 498 psi) | 3,500 kPa (35 kgf/cm 2 , 498 psi) |
| Decompressed | 500 kPa (5 kgf/cm 2 , 71 psi) or less | 500 kPa'(5 kgf/cm 2 , 71 psi) or less |
| Compressed | 3,500 kPa (35 kgf/cm 2 , 498 psi) or more | 3,500 kPa (35 kgf/cm 2 , 498 psi) or more |
PRESSURE SPECIFICATION
Remove the pressure gauges from FL and FR caliper bodies.
Remove the air bleeder screws from the RL and RR caliper bodies.
Connect the air bleeder screws to the FL and FR caliper bodies.
Connect two pressure gauges to the RL and RR caliper bodies.
Bleed air from the FL and FR caliper bodies.
Perform the ABS sequence control.
When the hydraulic unit begins to work, at first the RR side performs decompression, holding and compression, and then the RL side performs decompression, holding and compression.
Read values indicated on the pressure gauges and check if they meet the standard value.
After checking, remove the pressure gauges from caliper bodies.
Connect the air bleeder screws to RL and RR caliper bodies.
Bleed air from the brake system.
Checking Hydraulic Unit ABS Operation With Brake Tester
In the case of non-Saab 9-2X 2.0T Aero AT model, install a spare fuse with the FWD connector in the main fuse box to simulate FWD model.
Scheme 4
- Main fuse box
- FWD connector
Note. The AWD circuit of MT and Saab 9 -2X 2.0T Aero AT model can not be disabled.
Prepare for operating the ABS sequence control.
Set the front wheels or rear wheels on the brake tester and set the select lever's position at "N" range.
Scheme 5
Scheme 6
- Brake tester
Operate the brake tester.
Perform the ABS sequence control.
Hydraulic unit begins to work; and check the following working sequence.
The FL side performs decompression, holding and compression in sequence, and subsequently the FR side repeats the cycle.
The RR side performs decompression, holding and compression in sequence, and subsequently the RL side repeats the cycle.
Read values indicated on the brake tester and check if the fluctuation of values, while decompressed and compressed, meet the standard values.
| Front wheel | Rear wheel | |
|---|---|---|
| Initial value | 1,000 N (100 kgf, 221 lb) | 1,000 N (100 kgf, 221 lb) |
| Decompressed | 500 N (50 kgf, 110 lb) or less | 500 N (50 kgf, 110 lb) or less |
| Compressed | 1,000 N (100 kgf, 221 lb) or more | 1,000 N (100 kgf, 221 lb) or more |
PRESSURE SPECIFICATION
After checking, also check if any irregular brake pedal tightness is felt.
Operation
Under the ABS sequence control, after the hydraulic unit solenoid valve is driven, the operation of the hydraulic unit can be checked by means of the brake tester or pressure gauge.
ABS sequence control can be started by Vehicle Diagnostic Interface.