wsm STW37 Workshop Manual page 503

STW34, STW37, STW40, WSM
Symptom
Temperature Cannot
be Controlled (Mode
Motor and / or Mode
Switch Malfunction)
Temperature Cannot
be Controlled
(Heater Hoses Laid is
Bad)
WINDSHIELD WIPER
Symptom
Windshield Wiper
Does Not Operate
Windshield Wiper
Operating Speed Is
Too Low
Windshield Wiper
Does Not Stop
Correctly
Probable Cause and
Checking Procedure
1. Mode motor is damaged
2. Mode switch is damaged
3. Wiring harness controller
is disconnected
1. Heater hose is caught
2. Heater hose is twisted or
bent
Probable Cause and
Checking Procedure
1. Fuse is blown
(Short-circuit, burnt
component inside motor or
other part for operation)
2. Wiper motor is damaged
(Broken armature, worn
motor brush or seized
motor shaft)
3. Wiper switch is damaged
4. Foreign material interrupts
movement of link
mechanism
5. Wiper arm is seized or
rusted
1. Wiper motor is damaged
(Short-circuit of motor
armature, worn motor
brush or seized motor
shaft)
2. Low battery voltage
3. Humming occurs on motor
in arm operating cycle due
to be seized arm shaft
4. Wiper switch contact
improper
1. Wiper motor is damaged
(Contaminated auto-return
contacts or improper
contact due to foreign
matter)
Solution
Replace mode motor assembly.
Replace mode switch assembly.
Repair or replace wiring harness.
Repair heater hose.
Repair or replace heater hose.
Solution
Correct cause and replace fuse.
Replace wiper motor.
Replace wiper switch.
Repair linkage.
Lubricate or replace wiper arm.
Replace wiper motor.
Recharge or replace battery.
Lubricate or replace wiper motor.
Replace wiper switch.
Replace wiper motor.
10-S4
CABIN
Reference
Page
10-S28
10-S24
–
10-S51
10-S51
Reference
Page
G-39
10-S31
10-S30
–
–
10-S31
G-29
10-S54
10-S30
10-S54
9Y1211109CAS0001US0
KiSC issued 11, 2014 A