Ig Power Source Circuit - Toyota T100 1996 Service Manual

DTC
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the actuators.
DTC No.
Vehicle speed is 3 km/h (1.9 mph) or more and voltage of
41 ECU terminal IG1 remains at more than 17 V or below 9.5
V for more than 10 sec.
Fail safe function:
If trouble occurs in the power source circuit, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
WIRING DIAGRAM
W
R/B
6
2
No.2
5
2
2
2
1
2
Battery
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
41

IG Power Source Circuit

DTC Detecting Condition
IG Switch
14
W B−Y
IA3
3 1
− ANTI−LOCK BRAKE SYSTEM
S Battery
S IC regulator
S Open or short in power source circuit
S ECU
Fuse Box
on J/B No.1
6
F7
ECU−IG
4WD: Deceleration Sensor
Trouble Area
5
B B
F7
B
W−B
W−B
IC
DI−347
DI10J−01
ABS ECU
10
IG1
A15
11
GND
A15
24
GND
A15
F00359