ABS – Troubleshooting
35B-7
Code No.33: Stop lamp switch system (open circuit or
stop lamp stays ON)
Probable cause
This code is output, if the stop lamp switch is continuously on for 15 minutes or
more.
D Malfunction of stop lamp switch
D Malfunction of wiring harness or connector
D Malfunction of ABS-ECU
OK
Check the trouble symptom.
NG
Check the harness wire, and repair
if necessary.
D Between dedicated fuse No. 11
and ABS-ECU
OK
Check the trouble symptom.
NG
Replace the ABS-ECU.
OK
Check the trouble symptom.
NG
Check the harness wire, and repair
if necessary.
D Between stop lamp switch and
ABS-ECU
OK
Check the following connectors:
B-15, B-21, B-25, B-32, B-65
NG
Repair
OK
Check the following connector:
B-25
NG
Repair
YES
Measure at the ABS-ECU connector
B-25.
D Disconnect the connector, and
measure at the harness side
connector.
D Stop lamp switch: ON
D Voltage between 34 and body
ground
OK: Battery voltage
NG
Check the following connectors:
B-25, B-32, B-65
NG
Repair
OK
Stop lamp switch check
NG
Repair
Does the stop lamp turn on and off
normally?
NO
Stop lamp switch installation check
NG
Repair
Code No. 41, 42, 43, 44: Solenoid valve system Probable cause
ABS-ECU monitors the solenoid valve energization circuit at all times. This code is
output when no current flows through the solenoid even when ABS-ECU energizes
it or when current continues flowing through the solenoid even when ABS-ECU
deenergizes it, which is considered to be attributable to an open- or short-circuited
solenoid coil or open- or short-circuited harness.
D Defective hydraulic unit
D Defective harness or connector
D Defective ABS-ECU
OK
Replace the ABS-ECU.
OK
Check the trouble symptom.
NG
Check the harness between hydraulic
unit (solenoid valve) and ABS-ECU.
NG
Repair
OK
Check the trouble symptom.
NG
Check and repair the harness between
hydraulic unit and valve relay.
OK
Check the following connectors:
A-21, B-24, B-25
NG
Repair
OK
Measure at A-22 hydraulic unit connec-
tor and A-76 valve relay connector.
D Disconnect the connector and
measure at the harness side.
D Continuity across the following
terminals
Hydraulic Valve relay
unit side side
11 – 3
OK: Battery voltage
NG
Check the following connectors:
A-22, A-76
NG
Repair
Check the solenoid valve.
NG
Replace the hydraulic unit.
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