1995 TOYOTA SUPRA Service Repair Manual

Page 961 of 2543

TOYOTA SUPRA 1995  Service Repair Manual DTC 41 IG Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the CPU and the actuators.
 DTC No. Diagnostic Trouble Co

Page 962 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Check battery positive voltage.
Remove ABS (& TRAC) ECU with connectors still
connected.
1. Turn ignition switch ON.
2. Measure voltage between terminals IG1 and 
GND of ABS (& TRAC) ECU connector.
Vo

Page 963 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Check continuity between terminal GND of ABS (& TRAC) ECU
connector and body ground.
Measure resistance between terminals GND of
ABS (& TRAC) ECU connector and body ground.
Resistance:   1  or less
C

Page 964 of 2543

TOYOTA SUPRA 1995  Service Repair Manual DTC 44 Lateral Acceleration Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects acceleration acting laterally on the vehicle. The sensor signal is used in ABS control. If the
sensor functions abnor

Page 965 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Check for open and short in harness and connector between sensor and
ECU (See page IN±30).
1. Remove ABS (& TRAC) ECU with connec±
tors still connected.
1. Disconnect sensor connector.
3. Turn ignit

Page 966 of 2543

TOYOTA SUPRA 1995  Service Repair Manual DTC 51 ABS Pump Motor Lock
CIRCUIT DESCRIPTION
 
 DTC No.
 
 Diagnostic Trouble Code Detecting Condition
 

Page 967 of 2543

TOYOTA SUPRA 1995  Service Repair Manual DTC 55 Brake Fluid Level Warning Switch Circuit
CIRCUIT DESCRIPTION
The brake fluid level warning switch sends the appropriate signal to the ECU when the brake fluid level drops.
 DTC No.

Page 968 of 2543

TOYOTA SUPRA 1995  Service Repair Manual Check brake fluid level.
Check brake fluid level warning switch.
Check and repair brake fluid leakage and
add fluid.
Replace brake fluid level warning switch.
Repair or replace harness or connector.
C