ABS <4WD> ± Troubleshooting
35B-13
Code No.33 Stop lamp switch system Probable cause
This code is output in the following cases.
D If the stop lamp switch is continuously on for 15 minutes or more even though
the ABS system is not operating.
D If there is an open circuit in the stop lamp switch input circuit harness.
D Malfunction of stop lamp switch
D Malfunction of wiring harness or connector
D Malfunction of hydraulic unit and ABS-ECU
NG
Repair
OK
NG
Repair
OK
NG
Repair
NG
Replace
NG
Replace the hydraulic
unit and ABS-ECU.
NG
Check the harness wire,
and repair if necessary.
D Between stop lamp
switch and ABS-ECU
NG
Repair
NG
Check the harness wire, and repair if necessary.
D Between battery and stop lamp switch
D Between stop lamp switch and ABS-ECU
Check the trouble symp-
tom.
NG
Check the following
connectors:
A-58, C-28 <L.H. drive
vehicles>, C-41 <R.H.
drive vehicles>
Check the trouble symp-
tom.
OK
Check the following
connector: A-58
YES
Measure at the ABS-ECU connector A-58.
D Disconnect the connector, and measure at the harness side
connector.
D Stop lamp switch: ON
D Voltage between 3 and body earth
OK: System voltage
OK
Check the trouble symp-
tom.
OK
Check the following connectors: C-28 <L.H. drive vehicles>,
C-41 <R.H. drive vehicles>, C-02, C-04, C-29
OK
Check the stop lamp switch. (Refer to GROUP 35A ± Brake Pedal.)
Does the stop lamp turn on and off normally?
NO
Check the stop lamp switch installation condition.
(Refer to GROUP 35A ± On-vehicle Service.)
Code Nos.41, 42, 43 and 44 Solenoid valve
Probable cause
Code No.52 Valve relay problem (stays off)
Code No.53 Motor relay problem (stays off)
Code No.55 Motor system (seized pump motor)
These codes are output if there is an open circuit or short-circuit in the ABS-ECU
power supply circuit (power supply circuit for solenoid valve and motor), or the internal
circuit in the hydraulic unit and ABS-ECU is defective.
D Malfunction of wiring harness or connector
D Malfunction of hydraulic unit and ABS-ECU
NG
Repair
NG
Check the harness wire, and repair if necessary.
D Between fusible link No.1 and ABS-ECU
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble symp-
tom.
Check the following connector: A-58
OK
OK
Check the trouble symp-
tom.
Check the following connectors: A-58, C-24 <R.H. drive
vehicles>
Measure at the ABS-ECU connector A-58.
D Disconnect the connector, and measure at the harness side
connector.
D Voltage between 22 and body earth, and between 24 and
body earth
OK: System voltage
NG
To Next Page
Loading...
