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SERVICE BRAKES Anti-lock Braking System Troubleshooting
E-5
When diagnostic trouble code “51 VALVE RELAY” is displayed
[Explanation]
When the ignition switch is turned ON, the ABS
ECU switches the valve relay OFF and ON for
an initial check, compares the voltage of the signal
to the valve relay and valve power monitor line
voltage to check whether the valve relay operation
is normal. In addition, normally it monitors whether
or not there is power in the valve power monitor
line since the valve relay is normally ON. Then,
if the supply of power to the valve power monitor
line is interrupted, this diagnostic trouble code will
be output.
.
3
8
0
0 2
---
----------- -----
1
22
ECU
1
IGNITION
Remove
and check the valve
relay.
When the valve relay is
checked, are the following
conditions found?
No.
86: Resistance
value 60-120
No.
87a: Continuity
No.
87: No continuity
When battery positive voltage
is applied between terminals
No. 86 and No. 85.
No.
87: Continuity
No.
87a: No continuity
Yes
Install the valve relay and re-
move the HU connector.
With the ignition
No
HU power harness wire is
Yes
Is there continuity between HU
No. 8 and No. 7 terminals?
Faulty harness in HU
Yes
Connect the HU harness and
remove the ECU connector.
Yes
Repair harness.
t
harness side connector termi-
nal No. 22 and ground?
Yes
Is there
between
No
Malfunction of harness
H U
ABS ECU malfunction
Repair harness.
I
Replace ABS ECU.
TSB Revision
Содержание 1992 3000GT
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Страница 118: ...13A 14 MULTIPORT FUEL INJECTION Special Tools TSB Revision...
Страница 288: ...13A 184 MULTIPORT On Vehicle Inspection of MFI FUEL INJECTION Comtaonents Camshaft position sen 1TSB Revision...
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Страница 536: ...21 4 CLUTCH Troubleshooting Excessive wear of clutch disc facin I LJ 1 TSB Revision...
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Страница 570: ...22 14 MANUAL TRANSAXLE AWD Special Tools SPECIAL TOOLS Oil seal installer TSB Revision...
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Страница 608: ...23 18 AUTOMATIC TRANSAXLE Troubleshooting Excessive vibration shock during upshift TSB Revision...
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Страница 809: ...REAR SUSPENSION AWD Special Tools 34 23 B lMB990244 i TSB Revision...
Страница 810: ...34 24 REAR SUSPENSION AWD Troubleshooting TROUBLESHOOTING TSB Revision...
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Страница 964: ...37A 4 STEERING Snecial Tools SPECIAL TOOLS Preload socket General service TSB Revision...
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Страница 1068: ...42 62 BODY Sunroof SUNROOF SWITCH CONTINUITY CHECK 18FO403 TSB Revision...
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Страница 1103: ...52 1 i INTERIOR CONTENTS INTERIOR 52A SUPPLEMENTAL RESTRAINT SYSTEM SRS 528 i...
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