YH4
GRAND
VITARA
ANTILOCK BRAKE SYSTEM (ABS) (OPTIONAL) 5E1-15
1. Battery
2. Main fuses
3. Ignition switch
4. Circuit fuses
5. ABS hydraulic unit / control module
5-1. Terminal arrangement for ABS hydraulic unit /
control module assembly
5-2. ABS fail-safe relay (Solenoid valve relay)
5-3. ABS pump motor relay
5-4. Pump motor
5-5. Solenoid valves
6. ªABSº warning lamp
7. Right-rear wheel speed sensor
8. Left-rear wheel speed sensor
9. Right-front wheel speed sensor
10. Left-front wheel speed sensor
11. Data link connector
12. Diagnosis connector
13. Stop lamp
14. Stop lamp switch
15. PCM (ECM+TCM) or ECM
16. G sensor (For 4WD model only)
17. 4WD switch (For 4WD model only)
18. 4WD indicator lamp (For 4WD model only)
19. 4WD controller (If equipped)
20. EBD warning lamp (Brake warning lamp)
21. Combination meter
22. Parking brake switch
23. Brake fluid lever switch
24. Warning lamp driver moduleWire colorB : Black
B / Bl : Black / Blue
B / O : Black / Orange
B / W : Black / White
Bl : Blue
Bl /B : Blue / Black
Bl / O : Blue / Orange
Br : Brown
G : Green
G / B : Green / Black
G / W : Green / White
Lg : Lightgreen
Lg / B : Lightgreen / Black
O / B : Orange / Black
O / G : Orange / Green
O / W : Orange / White
P : Pink
P / B : Pink / Black
V / G : Violet / Green
W / BI : White / Blue
W / G : White / Green
W / Y : White / Yellow
Y : Yellow
Y / B : Yellow / Black
SYSTEM CIRCUIT
TERMINALCIRCUIT
A1Right-rear wheel speed sensor (+)
A2Right-front wheel speed sensor (±)
A3Right-front wheel speed sensor (+)
A4G sensor ground (For 4WD model only)
A5ÐÐÐ
A6ÐÐÐ
A7Idle up signal
A8Diagnosis switch terminal
A9Stop lamp switch
A10Ground (For ABS control module)
A11ABS fail-safe relay
A12Right-rear wheel speed sensor (±)
A13Left-front wheel speed sensor (±)
A14G sensor signal (For 4WD model only)
A15ÐÐÐ
A16ÐÐÐ
A17ªABSº warning lamp
A18Left-rear wheel speed sensor (+)
A19Left-rear wheel speed sensor (±)
A20Left-front wheel speed sensor (+)
A21ÐÐÐ
A22Data link connector
A23ÐÐÐ
A244WD switch (For 4WD model only)
A25Ignition switch
A26ªEBDº warning lamp
A27ABS pump motor relay
A28Ground (For ABS pump motor)
YH4
GRAND
VITARA
1. 4WD switch
2. Transfer
3. Blank
4. Blank
5. ECM or PCM
6. Glove box7. Air pump assembly
8. Actuator
9. Axle lock clutch
10. Free axle hub
11. 4WD indicator lamp
7E-2 DIFFERENTIAL (FRONT)
4WD CONTROL SYSTEM
When the 4WD switch is turned ON by shifting the transfer shift lever, ECM (PCM) (G16 and J20 engine models)
or 4WD controller (H25 engine model) actuates (energizes) the air pump assembly. Then positive pressure is sent
from the air pump assembly to the actuator installed to the differential case and causes the axle lock clutch and
the free axle hub in the differential case to be engaged, resulting in the 4WD mode. Only when running in the 4WD
mode, front axles are joined to differential case, and they become free when 2WD mode is used (or when transfer
shift lever is shifted to N position), thereby reducing the power loss.
