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SERVICE BRAKES
Anti-lock Braking System Troubleshooting
Code No. 53 HU pump motor or ABS motor relav svstem
Probable cause
I
Output is provided in the following cases.
l
No signal is received by motor monitor line with ABS motor relay turned ON.
(HU pump motor does not run.)
l
Signal is received by motor monitor line for 5 seconds or more with ABS motor
relay turned OFF. (HU pump motor continues to run.)
l
ABS motor relay does not operate.
l
ABS motor relay defective.
l
Harness, connector defective
l
HU defective
l
ABS-ECU defective
Caution
Driving HU pump motor for actuator test discharges the battery. After the test, therefore, start
the engine and keep it running for a while.
Check harness between HU and ABS-ECU, and
Is sound of HU pump motor running is heard?
Check ABS motor relay. (Refer to
Check harness between main fusible link No.
? and ABS motor relay, and repair if necessary.
OK
N G
Check the
NG
l
Disconnect connectors and make
ments on harness side.
OK
l
Resistance between
No. 82 and 77.
Check trouble symptoms.
.
Check harness between ABS motor relay and
ABS-ECU, and repair if
t
NG
l
Check harness between HU and ABS-ECU,
l
Disconnect connectors and make
ments on harness side.
l
Resistance between terminal No. 65 and
body ground
and repair if necessary.
l
Check and repair HU pump motor ground.
OK
Check HU pump motor operation.
(Refer to
Replace HU
OK
NG
OK
Check trouble symptoms.
Replace ABS-ECU.
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...
Page 586: ......
Page 588: ......
Page 590: ......
Page 592: ......
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Page 596: ......
Page 598: ......
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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