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SERVICE BRAKES
Anti-lock Braking System Troubleshooting
Code No. 51 ABS valve relay system
Probable cause
ABS-ECU monitors solenoid valve drive circuit at all times. When 5 or more solenoids
are not energized with solenoid valve turned ON by ABS-ECU or when 5 or more
l
valve relay defective
solenoids are kept energized with solenoid valve turned OFF by ABS-ECU, ABS
l
Harness, connector defective
l
HU defective
valve is judged to be in trouble and output is provided.
l
ABS-ECU defective
Check ABS valve relay.
(Refer to
Replace ABS valve relay.
Measure at ABS valve relay
connector A-80.
Check harness between ABS valve
l
Disconnect connectors and
make measurements on har-
ness side.
l
Voltage between terminal No. 5
and body ground
Battery voltage
Measure at ABS-ECU connector
NG
E-12.
l
Disconnect connectors and
make measurements on har-
ness side.
l
Resistance between 82-47
c-94, A-80
Check solenoid valve.
(Refer to
Replace HU.
Check harness between ABS valve
A-64,
at HU connector A-64 and
connector E-l 2.
Disconnect connectors and
make measurements on har-
ness side.
Continuity between the following
terminals
Continuity provided
HU side
ABS-ECU side
3
78
7
50
4
31
8
59
1
30
5
58
2
79
6
51
OK
Check harness between HU and
ABS-ECU, and repair if necessary.
Measure at HU connector A-65 and
ABS valve relay connector A-80.
l
Disconnect connectors and
make measurements on har-
A-65, A-80
ness side.
l
Continuitybetween thefollowing
Check harness between HU and
ABS valve relay, and repair if
OK: Continuity provided
HU side ABS valve relay side
necessary.
1
2
-
4
OK
N G
E-12
Check trouble symptoms.
Replace
TSB Revision
Summary of Contents for 1992 3000GT
Page 1: ......
Page 2: ......
Page 104: ...13 2...
Page 118: ...13A 14 MULTIPORT FUEL INJECTION Special Tools TSB Revision...
Page 394: ...NOTES...
Page 460: ...NOTES...
Page 532: ...NOTES...
Page 536: ...21 4 CLUTCH Troubleshooting Excessive wear of clutch disc facin I LJ 1 TSB Revision...
Page 556: ...NOTES...
Page 570: ...22 14 MANUAL TRANSAXLE AWD Special Tools SPECIAL TOOLS Oil seal installer TSB Revision...
Page 582: ...i...
Page 584: ...I di...
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Page 600: ...I I I LJ LJ I L...
Page 609: ...AUTOMATIC TRANSAXLE Troubleshooting 23 I 9 L L 1 TSB Revision...
Page 668: ...NOTES...
Page 692: ...NOTES...
Page 752: ...33 2 NOTES...
Page 766: ...NOTES...
Page 809: ...REAR SUSPENSION AWD Special Tools 34 23 B lMB990244 i TSB Revision...
Page 810: ...34 24 REAR SUSPENSION AWD Troubleshooting TROUBLESHOOTING TSB Revision...
Page 946: ...NOTES...
Page 958: ...NOTES...
Page 960: ...37 2...
Page 964: ...37A 4 STEERING Snecial Tools SPECIAL TOOLS Preload socket General service TSB Revision...
Page 994: ...NOTES...
Page 1006: ...NOTES...
Page 1068: ...42 62 BODY Sunroof SUNROOF SWITCH CONTINUITY CHECK 18FO403 TSB Revision...
Page 1070: ...NOTES I...
Page 1103: ...52 1 i INTERIOR CONTENTS INTERIOR 52A SUPPLEMENTAL RESTRAINT SYSTEM SRS 528 i...
Page 1104: ...52 2 NOTES...
Page 1220: ...NOTES dl...
Page 1307: ...1 1 I I I 1 I 1 1 I I I j I i i i I i I j j...
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