ABS <4WD> -
Troubleshooting
35B-17
Code No. 52 Valve relay system (OFF problem) Probable cause
This code is output if the ABS-ECU judges that there is a valve relay OFF
problem when the valve relay is on and power is supplied to the solenoid valve.
D
Malfunction of harness or connector
D
Malfunction of ABS valve relay
D
Malfunction of the ABS-ECU
NOTE
When reading the diagnosis codes using the ABS warning lamp (Refer to P.35B-5.), the valve relay
connector is disconnected during inspection, with the result that this problem code will be output in addition
to any other problem codes.
After the problem locations indicated by the problem diagnosis codes have been checked and repaired
but the ABS warning lamp remains illuminated and no diagnosis codes other than code No. 52 are displayed,
there is probably a malfunction of th e valve relay system. In this case, carry out the following inspection.
NG
Repair
(1)NG
Check the ABS valve relay (Refer to P.35B-28).
NG
Replace the ABS valve relay.
OK
Check the harness wire, and repair if necessary.
D
Between ignition switch and ABS valve relay
OK
Repair
OK
Replace the ABS-ECU.
Check the trouble symptoms.
Check the following connectors:
B-21X, D-32 <R.H.D.>,
D-128, D-208, D - 210 <R.H.D.>, D-213 <L.H.D.>, E - 13
OK
NG
NG
Check the harness wire, and repair if necessary.
D
Between ABS valve relay and HBB and ABS-ECU terminal
No. 48
(2)NG
Measure at ABS valve relay connector B-21X.
D
Disconnect the connector and measure at the harness
side.
D
Ignition switch: ON
(1) Voltage between 1 and body earth
OK:
System voltage
(2) Voltage between terminal 5 and body earth
OK:
System voltage
Check the harness wire, and repair if necessary.
D
Between fusible link No. 8 and the ABS valve relay
OK
NG
Repair
NG
Check the trouble symptoms.
Check the following connector: B-21X
OK
NG
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
OK
NG
Repair
Check the harness wire, and repair if necessary.
D
Between ABS-ECU and ABS valve relay
NG
Check the trouble symptoms.
Check the following connectors:
E-107, B-21X
OK
OK
NG
Repair
Check the trouble symptoms.
Check the following connectors:
B-17, B-18, B-21X, E-107
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