1991 LEXUS SC400 wiring

WIRING DIAGRAM
DTC61ABS & TRAC ECU Communication Circuit
Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
61Malfunction in ABS & TRAC ECU communication cir-
cuit.
Open or short in ABSO, BRC, BRP circuit

ABS & TRAC ECU

TRAC ECU
DIAGNOSTIC CHARTDIAGNOSTIC CHART
BR±220±
BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)
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±
BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)BR±223
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BR±150). BE±163
.
IN±33
).
WIRING DIAGRAM
TRAC Indicator Light Circuit
CIRCUIT DESCRIPTION
The TRAC indicator blinks during TRAC operation.
This indicator is also used for warnings when the trouble occurs and for disp\
laying diagnostic trouble codes.
DIAGNOSTIC CHARTDIAGNOSTIC CHART
±
BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)BR±225
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BR±160).
IN±33 ).
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Tc Terminal Circuit
CIRCUIT DESCRIPTION
By connecting between terminals Tc and E1 of DLC1 or DLC2, the ECU displays the diagnostic trouble
code by blinking the TRAC indicator light.
DIAGNOSTIC CHARTDIAGNOSTIC CHART
BR±226±
BRAKE SYSTEM TRACTION CONTROL SYSTEM (TRAC)
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BR0EW±05
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w/o TRAC:
±
BRAKE SYSTEM ANTI±LOCK BRAKE SYSTEM (ABS)BR±55
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±
BRAKE SYSTEM ANTI±LOCK BRAKE SYSTEM (ABS)BR±95
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±
BRAKE SYSTEM ANTI±LOCK BRAKE SYSTEM (ABS)BR±99
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WIRING DIAGRAM
±
BRAKE SYSTEM ANTI±LOCK BRAKE SYSTEM (ABS)BR±103
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