Chapter 3 Wiper and Washer SystemSection 1 Wiper and Washer System Inspection5-21Remark:
The table below can help you find the causes of malfunction. These figures show the most possible
malfunctions in order of priority. Inspect each part in the order given. If necessary, repair or replace these parts.
Symptom
Front wiper does not work.
Front wiper in intermittent shift does not work.
Front washer motor does not work
When the washer switch is placed ON, front
wiper does not work
Washer fluid dose not jet out
1. When the washer switch places on OFF, wiper
blade can not return, or stay in a wrong place.
2. The wiper blade scratches the bodySuspected Area
1. Wiper fuse
2. Wiper switch assembly
3. Harness
1. Wiper switch assembly
2. Wiper motor assembly
3. Harness
4. Central controller
1. Wiper fuse
2. Wiper switch assembly
3. Wiper motor assembly
4. Harness
1. Wiper switch assembly
2. Wiper motor assembly
3. Harness
4. Central controller
1. Washer hose and nozzle
1.Wiper motor assembly (The position of wiper arm)II. Trouble shooting1. Check work of washer pump
(1) Install washer pump on tank system, pour cleaning fluid into
the tank.
(2) Disconnect connector of washer pump.
(3) As shown in the figure below, connect No. 1 terminal of
washer pump with positive pole (+) of storage battery; con
nect No. 2 terminal with negative pole (-) of storage battery.
Check whether cleaning fluid flows from tank.
(4) If there is no outflow, replace washer pump.Wiper and Washer System -Wiper and Washer System Inspection
Fixed Bolt (5) Remove 2 fixed bolts on wiper connecting rod
(6) Use special tool to uncouple motor crank arm shaft and wiper connecting rod
2. Replace with new wiper motor
(1) Use special tool to press motor crank arm shaft and wiper connecting rod into right position
(2) Fasten 4 bolts according to specified torque
(3) Connect socket connector
(4) Start wiper, spray cleaning fluid onto glass, check wiping state, whether original position of wiper arm is
normal, Otherwise remove wiper arm doctor blade assembly and make appropriate adjustment
Notes: crank arm shaft head of newly replaced wiper motor must always be filled with lubricating oilII. Wiper blades replacement1. Remove doctor blade of No. 1 and 2 wiper arm blade assembly
Remove doctor blade from No. 1 and 2 wiper arm blade assembly respectivelyLoosenWiper and Washer System -Replacement and Adjustment5-242. Replace new blade
Replace new blade No. 1 and 2 wiper arm blade assembly respectively
III. Wiper switch assemblyReplacement
1. Detach steering wheel assembly
(1) Disconnect the main power source of the vehicle.
(2) Remove the passenger SRS module assembly, and cautiously put it in a safe place.
(3) Loosen steering wheel lock-bolts and remove the assembly.
2. Remove wiper switch (1) Disconnect the connector.
(2) Remove the 2 tapping screws that are for mounting the wiper switch, take out the wiper switch from the
bracket of the combination switch.IV. Washer nozzleAdjustment
1. Inspect washer nozzle
(1) Start the engine, check if the position where the washer fluid from the nozzle sprays the windshield is in
the upper center wiped by the blades.
(2) Change the height (left/right) of the nozzle hole to adjust the point where washer fluid sprays the windshield.Wiper and Washer System -Replacement and Adjustment5-25
4. Knocking sensor
(1) Knocking sensor is a vibration acceleration sensor. Mounted on engine cylinder body. Sensing element of
the sensor is a piezocrystal. Vibration of engine cylinder body is transferred to piezocrystal via mass block in the
sensor. Since pressure generated by vibration of mass block is applied to piezocrystal, it generates voltage on two
polar planes and turns vibration signal into voltage signal for output.5-122Symptom
Poor accelerationPossible cause
Various liquids, such as engine oil, cooling fluid, brake fluid, water etc
contact the sensor for a long time, which cause corrosion to the sensor. Mounting torque: 20 ± 5 N.M
Repair precautions: sensor must be fitted closely to cylinder body with its metal surface, any type of washer
is not permitted for installation. For wiring of sensor signal cables, note that do not let resonance occur to signal
cables, otherwise they might be broken. Energizing of high voltage between sensor 1 # and 2 # pins must be
avoided, otherwise piezoelectric element might be damaged.
(2) Simple measuring method:
(Remove joint) turn digital multimeter to ohm position, connect two meter pens with sensor 1 #, 2 # pin
respectively, its resistance value at room temperature should exceed 1M ohm. Turn digital multimeter to millivolt
position, use a hand hammer to tap near knocking sensor, now voltage signal output should be available.
5. Oxygen sensor
(1) Its sensing element is a ceramic tube, outside is open to exhaust, inside is open to atmosphere. When
temperature of sensing ceramic tube reaches 350°C, it will have the characteristic of solid state electrolyte. Just
utilizing this characteristic, it converts concentration difference of oxygen into electric potential difference, thus
forms electrical signal output. If mixed gas is a bit concentrated, inside and outside oxyanion concentration
difference of ceramic tube is high, electric potential difference is a bit high.
A large number of oxyanions move from inside to outside, output voltage is high (approximate 900mV); if
mixed gas is a bit thin, inside and outside oxyanion concentration difference of ceramic tube is low, electric
potential difference is low, only a small quantity of oxyanions move from inside to outside, output voltage is low
(approximate 100mV).
Possible cause
1. humid water vapor ingresses inside of sensor, temperature
changes rapidly, probe is broken.
2. oxygen sensor "is poisoned". (Pb, S, Br, Si) Symptom
Poor idle speed, poor speedup, tail gas
overproof, too high oil consumption1 2 3 4Oxygen sensor Mounting torque: 40-60 N.m
Repair precautions: it is prohibited to use cleaning fluid, oily liquid or volatile solid on oxygen sensor during
repair.
(2) Simple measuring method:
(Remove joint) turn digital multimeter to ohm position, connect
two meter pens with sensor 1# (white), 2# (white) pin respectively, its
resistance value at room temperature is 1- 6 ohm.
(Connect joint) in idle speed condition, when oxygen sensor
reaches its working temperature of 350°C, turn digital multimeter to
DC voltage position, connect two meter pens with sensor 3# (grey),Engine EFI System-Engine EFI System
