ABS <4WD> -
Troubleshooting
35B-16
Code No. 51 Valve relay system (ON problem) Probable cause
This code is output when the ABS-ECU judges during the initial check when the
ignition switch is turned to the ON position and the valve relay is OFF that there
is a fused relay contact or a short-circuit in the valve relay drive circuit when
power is being supplied to the solenoid valve.
D
Malfunction of harness or connector
D
Malfunction of ABS valve relay
D
Malfunction of the ABS-ECU
Repair
NG
Check the ABS valve relay (Refer to P.35B-28).
NG
Replace the ABS valve relay.
OK
Check the harness, and repair if necessary.
D
Between ABS valve relay and ABS-ECU
OK
NG
Repair
OK
Replace the ABS-ECU.
Check the trouble
symptoms.
Check the following connectors:
E-107, B-21X
OK
NG
NG
Check the harness, and repair if necessary.
D
Between ABS valve relay and HBB and ABS-ECU terminal
No.48
D
Between ABS valve relay and body earth
Measure at ABS-ECU connector E-107.
D
Disconnect the connector and measure at the harness
side.
D
Ignition switch: ON
D
Voltage between terminal 37 and body earth
OK:
System voltage
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