ABS <4WD> -
Troubleshooting
35B-15
Code No. 41, 42, 43, 44 Control solenoid valve system
Probable cause
Code No. 45, 46 Select solenoid valve system
The ABS-ECU constantly monitors the solenoid valve drive circuits. These codes
are output if the ABS - ECU judges that there is an open circuit or short- circuit in
a solenoid coil or harness because the solenoid valve is on but no current flows
to the solenoid valve, or if current continues flowing to the solenoid valve even
thought the solenoid valve is off.
D
Malfunction of harness or connector
D
Malfunction of HBB’s master cylinder and hydraulic
unit assembly
D
Malfunction of the ABS-ECU
NG
NG
OK
Repair
NG
Replace the HBB’s master cylinder and hydraulic unit
assembly.
OK
Check the following connectors:
B-18, B-21X
Check the harness wire, and repair if necessary.
D
Between HBB and ABS valve relay
OK
Check the trouble
symptoms.
NG
Repair
OK
OK
Replace the ABS-ECU.
Repair
Measure at HBB connectors B-16, B-17, B-18.
D
Disconnect the connectors and measure at the HBB side.
D
Control solenoid valve IN: Resistance between terminals 34
- 19 (FR), 34 - 21 (FL), 34 - 13 (RL) and 34 - 15 (RR)
OK:
4.75 - 5.25
W
D
Control solenoid valve OUT: Resistance between terminals
34 - 20 (FR), 34 - 22 (FL), 34 - 14 (RL) and 34 - 16
(RR)
OK:
2.0 - 2.4
W
D
Select solenoid valves: Resistance between terminals 34 -
18 (FR) and 34 - 17 (FL)
OK:
3.5 - 3.9
W
D
Valve relay monitor: Continuity between terminals 34 - 3
OK:
Continuity (approx. 33
W
)
NG
Check the following connectors:
B-16, B-17, E-106, E-107
Check the trouble symptoms.
NG
Check the harness wire between the HBB (solenoid valve,
valve relay monitor) and the ABS-ECU.
Measure at HBB connector B-18 and ABS valve relay
connector B-21X.
D
Disconnect the connectors and measure at the harness
side.
D
Continuity between terminal 34 (HBB side) and terminal 2
(valve relay side)
OK:
Continuity
NG
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