Brake-31
Antilock Braking System (ABS)
Cautions
1. It must not remove or install the electric elements and wire bunch plug when the ignition switch is in ON to avoid
the damage of ECU. It should turn off the ignition switch if needs disassembly.
2. Pay attention to do not knock or impact the ABS ECU during the maintenance and repair, for it will damage the
ABS ECU easily.
3. The wheel speed sensor and hydraulic unit (integrated with ECU) of BOSCH ABS8.0 can not be repaired, it should
be replaced in integral if damaged.
4. After the brake system is maintained, the brake pedal maybe soft. Discharge the air according to the normal brake
system.
5. It must use the brake fluid from original manufacturer; the brake fluid of different number cannot be used in mixed,
otherwise it will cause the failure of brake system. Select the tyre of original type as most as possible
Repair of Antilock Braking System (ABS)
1. It should process the failure diagnosis for the brake system before process the ABS failure diagnosis. It can
diagnose out the failure rapidly by using Table 1. In Table 1, the small number means the failure which occurs most
possibly. Check each element according to the sequence and maintain or replace it if necessary.
2. Check the following elements for normal operation before the diagnosis:
Brake fluid level and brake fluid quality
Pressure of tyre, size of tyre, shape and depth of tyre figure
Other brake component
These components will affect the brake effect of the ABS. Check the system sensor, connecting wire and connector for correct
installation, arrangement and connection. Ensure the completeness of fuse, repair or replace it if necessary.
3. Process the analysis and diagnosis according to the ABS advanced by owner. Use the diagnosis instrument (Annex
1) for final check and confirmation. It must process the run inspection after the competition of all ABS maintenance.
The test condition is shown as follows:
a. Confirm the tyre complies with the requirement, the tyre pressure is normal.
b. The brake system (including brake light ) is normal
c. The brake system is without leakage.
d. The position and installation of wheel speed sensor is correct.
e. All fuses are normal.
4. test method:
Run for 1 min at least when the vehicle speed is beyond 40Km/h, process a proper brake. Then read out the failure code to
ensure the ABS is without failure code.
CD Player and Air Conditioning System-3
(Figure 7-2) cable position of 2-pin connector socket
Pos. No. Color Function Pos. No. Color Function
1 Whit e Send the data (TX) 11 Shielded cable Earthing of data cable
2 Red Receive the data (RX) 12 — —
3 Brown Telephone mute (TEL) 13 Blue Automatic antenna (ANT )
4 Orange Lighting (LAMP) 14 Red Ignition power supply (ACC)
5 — — 15 Grounding wire
6 — — 16 Yellow Memory power supply B+
7 Whit e and
black Front left speak (-FL-) 17 Green and black Rear left speak (-RL-)
8 White Front left speak (+FL+) 18 Green Rear left speak (+RL+)
9 Gray and
black Front right speak (-FR-) 19 Violet and black Rear right speak (-RR-)
10 Gray Front right speak (-FR+) 20 Violet {Rear right speak (+RR+)
Possible Troubles of CD Player, Inspection and Analysis
Trouble Descriptions Possible causes, inspection and solutions
No programs received for AM and FM Check if the antenna is pulled out and socket becomes
loosened.
Impurity of sound after radio auto-searching Tune to the correct radio station with manual tuning method
No sound of one speaker Check the speaker a nd the socket or adjust the balance(front,
back, left and right)
Refuse to work Check the power supply, or disconnect and connect the power
supply and restart the player.
No power supply Check if the plug-in fuse and output plug is loosened and if the
fuse is burned down.
Single channel when played Check if the speaker is in open-circuit and examine its plug
Not read CD Check the CD type and if it is placed in reverse or scratched.
Display screen displaying bad Check the connecting wire of display screen or adjust the
brightness level higher
Air conditioner refuses to start Inspect the ECU of air conditioner and air conditioning system
Button failure of air conditioner Inspect the ECU of air conditioner and air conditioning system
A-side V iew
