ABS <4WD> -
Troubleshooting
35B-18
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble Symptom Inspection
procedure
No.
Reference
page
Communication with MUT-II is not possible. 1 35B-18
Communication with MUT-II and the ABS-ECU is not possible. 2 35B-19
The ABS warning lamp does not illuminate when the ignition key is turned to ON (engine
stopped).
3 35B-20
The ABS warning lamp remains illuminated after the engine has started. 4 35B-20
The brake warning lamp does not illuminate when the ignition switch is turned ON (engine
stopped).
Refer to GROUP 35A.
The brake warning lamp remains illuminated after the engine has started.
Abnormal brake operation 5 35B-21
Caution
(1) Because the ABS may also operate at times when sudden braking is not being carried out,
such as when driving on low frictional coefficient roads, when turning at high speed or during
high- speed overtaking, check with the customer that the problems are not occurring when
driving under conditions such as these.
(2) When the ABS is operating, changes in the brake pedal feel (vibration and difficulty depressing
the pedal) may occur. This happens because the hydraulic pressure inside the brake line is
continually changing in order to stop the wheels from locking up, and is not a malfunction.
INSPECTION PROCEDURES FOR TROUBLE SYMPTOMS
Inspection procedure 1
Communication with MUT-
II
is not possible.
Probable cause
The cause is probably a malfunction of the diagnosis connector power supply
circuit or earth circuit.
D
Malfunction of diagnosis connector
D
Malfunction of harness or connector
NG
Check the following connectors:
D-23, D-27, D-210, D-211
NG
Repair
OK
Check the trouble symptoms.
NG
Check the harness wire, and repair if necessary.
D
Between battery and diagnosis connector
OK
NG
NG
Repair
OK
Check the trouble symptoms.
NG
Check the harness wire, and repair if necessary.
D
Between diagnosis connector and earth
OK
NG
Replace the MUT-
II.
Measure at diagnosis connecter D-23.
D
Voltage between 16 and body earth
OK:
System voltage
Check the following connector:
D-23
Measure at diagnosis connecter D-23.
D
Continuity between terminals 4, 5 and body earth
OK:
Continuity
Check the trouble symptoms.
www.WorkshopManuals.co.uk
Purchased from www.WorkshopManuals.co.uk
To Next Page
Loading...
Need help?
General
