System Circuit and Operation
1. 4WD switch
2. Air pump assembly
3. Pump motor
4. Release valve
5. Pressure switch
6. Transfer
7. Front differential
8. Air hose and pipe
9. 4WD indicator lamp
10. To ignition switch
11. ECM or PCM
(from ECM or PCM)
(refer to "Components and Functions")
Power supply
DIFFERENTIAL (FRONT) 7E-3
Operation