In IGN2 ON state, If the
wiper auto switch input is ON, then wiper low and high relay outputs are
controlled by BCM.(BCM control the relay according to the rain sensor
input signal.)
|
Rain sensor is mounted on front windshield
glass.
If the wiper switch is set to the auto
position, then the multi-function switch sends auto signal to BCM
via LIN communication line.
One of the five sensitivity through wiper auto
switch positions will be sent rain sensor from BCM. The slowest mode
of the wiper auto switch refers to the least sensitive state, while
the fast mode refers to the most sensitive
state. |
The rain sensor sends a
duty cycle signal(rain detected, low speed request, high speed request) to
BCM according wiper to auto switch position.
[BCM output signal (BCM
to rain sensor)]
BCM sends a sensitivity
signal of the wiper auto switch to the rain sensor. The requested
sensitivity signal consists of a modulated pulse waveform.
[BCM input signal (Rain
sensor to BCM)]
The rain sensor sends
back a signal (rain detected, low speed request, high speed request) to
the BCM. The signal of the rains sensor consists of a modulated pulse
waveform.
* The rain sensor shall
output the various modes accoding to the following chart:
[Rain sensor output signal(Rain sensor
to BCM)]
NO
|
MODE
|
Duty Cycle
|
1
|
OFF
|
9.5% ±
3%
|
2
|
Fault 1
Detected
|
23.8% ±
3%
|
3
|
Fault 2
Detected
|
38.0% ±
3%
|
4
|
Fault 3
Detected
|
52.4% ±
3%
|
5
|
Rain
Detected
|
66.7% ±
3%
|
6
|
Low Speed
Request
|
81.0% ±
3%
|
7
|
High Speed
Request
|
95.2% ±
3%
|
Overall Period must be 15
mSec
|
This code is set when
BCM detects a internal error of the rain sensor during IG KEY "ON" &
wiper switch "AUTO".
Item
|
Detecting
Condition
|
Possible cause
|
DTC
Strategy
|
| •
|
Check rain sensor internal
error. | |
|
Enable
Conditions
|
| •
|
Rain sensor internal
error. | |
Threshold
Value
|
| •
|
Output signal with Duty cycle 23.8% ±
3% | |
Diagnostic
Time
|
|
| 1. |
Ignition "OFF", connect
scantool. |
| 2. |
Ignition "ON" & Engine "OFF", select
"Diagnostic Trouble Codes(DTC)"
mode. |
| 3. |
Monitor diagnostic trouble code and present of
trouble code. |
| 4. |
Using a scan tool, clear the DTC.
|
| 5. |
Are any DTC present?
|
|
▶ Go to
"W/Harness Inspection" procedure.
|
|
|
▶
Displaying nothing(no DTC) shows that Fault is intermittent
caused by poor contact in the part's and/or RAIN SENSOR
connector or was repaired and BCM memory was not
cleared.
Thoroughly check
connectors for looseness, poor connection, bending, corrosion,
contamination, deterioration, or damage.
▶ Repair or replace as necessary and then go to
"Verification of Vehicle Repair"
procedure.
|
|
| Terminal And Connector
Inspection |
| 1. |
Many malfunctions in the electrical system are
caused by poor harness(es) and terminals. Faults can also be caused
by interference from other electrical systems and mechanical or
chemical damage. |
| 2. |
Check the following conditions:
| (1) |
Check for damaged harness and terminals:
contact resistance, oxidation, bent or broken
terminals. |
| (2) |
Check for poor connection between ECM
and component: backed out terminal, improper mating, broken
locks and poor terminal to wire
connection. |
|
Using a suitable male pin to ensure that
contact in sockets is good. The pin should remain in position
when pulled
gently. | |
| 3. |
Has a problem been found?
|
|
▶ Repair as
necessary and then go to "Verification of Vehicle Repair"
procedure.
|
|
|
▶ Go to
"Component Inspection"
procedure.
|
|
| 1. |
Check rain sensor
| (2) |
Turn the wiper auto switch
on. |
| (3) |
Is wiper auto mode operated
normally?
|
|
▶
Thoroughly check connectors for looseness, poor
connection, bending, corrosion, contamination,
deterioration or damage.
Repair or replace as necessary and then go to
"Verification of Vehicle Repair"
procedure.
|
|
|
▶
Replace rain sensor and Go to "Verification of Vehicle
Repair"
procedure.
|
| |
| Verification Of Vehicle
Repair |
After a repair, it is
essential to verifying that the fault has been corrected.
| 1. |
Connect scan tool and select "Diagnostic
Trouble Codes(DTCs)" mode. |
| 2. |
Using scantool, Clear
DTC. |
| 3. |
Operate the vehicle within DTC Enable
conditions in General information. |
| 4. |
Are any DTCs present ?
|
|
▶ Go to the
applicable troubleshooting procedure.
|
|
|
▶ System is
performing to specification at this
time.
|
|
