2009 NISSAN LATIO ignition

WT
N
O P
OK or NG OK >> GO TO 4.
NG >> Check BCM power supply circuit for open or short. OK >> Replace BCM. Refer to
BCS-18, " Removal and Installa-
tion of BCM " .
NG >> Repair BCM ground circuit.
Low Tire Pressure Warning Lamp Flas hes When Ignition Switch Is Turned On
INFOID:0000000004307338
NOTE:
If low tire pressure warning lamp fl ashes as shown, the system is normal.
Flash Mode A
• This mode shows transmitter status is OFF-mode. Carry out transmitter wake up operation. Refer to WT-13, " Trans-
mitter Wake Up Operation " .
DIAGNOSTIC PROCEDURE OK >> GO TO 2.
NG >> Repair or replace damaged parts.

OK >> Replace BCM. Refer to
BCS-18, " Removal and Installa-
tion of BCM " .
NG >> Repair or replace harness connector.
Hazard Warning Lamps Flash When Ignition Switch Is Turned On INFOID:0000000004307339
DIAGNOSTIC PROCEDURE OK >> Replace BCM. Refer to
BCS-18, " Removal and Installa-
tion of BCM " .
NG >> Repair BCM ground circuit.
ID Registration Ca nnot Be Completed INFOID:0000000004307340
DIAGNOSTIC PROCEDURE ID Registration Procedure " .
Can ID registration of all transmitters be completed? YES >> Inspection End.
NO >> GO TO WT-19, " Data from Transmitter Not Being Received " .
Continuity should exist.

WW
N
O P
FRONT WIPER AND WASHER SYSTEM
Component Parts and Har ness Connector Location INFOID:0000000004306904
System Description INFOID:0000000004306905
• Front wiper relays (front wiper relay, front wiper hi gh relay) are located in the IPDM E/R (intelligent power
distribution module engine room).
• Wiper switch (combination switch) is composed of a combination of 5 output terminals and 5 input terminals.
Terminal combination status is read by BCM (body control module) when switch is turned ON.
• BCM controls front wiper LO, HI, and INT (intermittent) operation.
• IPDM E/R operates wiper motor accordi ng to CAN communication signals from BCM.
OUTLINE
Power is supplied at all times
• to ignition relay, located in IPDM E/R, from battery directly,
• through 40A fusible link (letter g, located in fuse and fusible link box)
• to BCM terminal 70,
• through 30A fuse (No. 39, located in IPDM E/R)
• to front wiper relay located in IPDM E/R
• through 15A fuse (No. 52, located in IPDM E/R), and
• through 20A fuse (No. 53, located in IPDM E/R)
• to CPU located in IPDM E/R.
When ignition switch is in ON or START position, power is supplied
• through ignition relay (located in IPDM E/R)
• to front wiper relay (located in IPDM E/R), and 1. IPDM E/R E45, E46 and E48 2. BCM M18 and M20 (view with glove
box removed)3. Front wiper motor E1
(view with cowl
top cover removed)
4. Front and rear washer motor E2 (view with front bumper fascia re-
moved) 5. Combination switch (wiper switch)
M28

WW
N
O P
AUTO STOP OPERATION
With wiper switch turned OFF, wiper motor will cont inue to operate until wiper arms reach windshield base.
When the wiper arms are not located at base of wi ndshield with wiper switch OFF, ground is supplied
• from IPDM E/R terminal 33
• to front wiper motor terminal 3, in order to continue wiper motor operation at low speed.
When the wiper arms reach base of windshield, fr ont wiper motor terminals 4 and 2 are connected, and
ground is supplied
• to IPDM E/R terminal 38
• through front wiper motor terminals 4 and 2, and
• through grounds E15 and E24.
Then the IPDM E/R sends auto stop operation signal to BCM with CAN communication line.
When the BCM receives auto-stop operation signal, BCM sends wiper stop signal to IPDM E/R with CAN com-
munication line.
IPDM E/R stops wiper motor. Wiper motor wi ll then stop wiper arms at the STOP position.
WASHER OPERATION When the wiper switch is in front wiper washer positi on, BCM detect front wiper washer signal by BCM combi-
nation switch reading function. Refer to BCS-3, " System Description " .
Combination switch power is supplied
• through combination switch terminal 14
• to washer motor terminal 1.
Ground is supplied
• to front washer motor terminal 2
• through combination switch terminal 11, and
• through combination switch terminal 12
• through grounds M57 and M61.
With ground supplied, front washer motor is operated.
When the BCM detects that front washer motor has operated for 0.4 seconds or longer, BCM operates front
wiper motor for low speed.
When the BCM detects washer switch is OFF, low speed operation cycles approximately 2 times and stops.
MIST OPERATION When the wiper switch is turned to the mist positi on, wiper low speed operation cycles once and then stops.
For additional information about wiper operation under th is condition, refer to "LOW SPEED WIPER OPERA-
TION" .
If switch is held in mist posit ion, low speed operation continues.
FAIL-SAFE FUNCTION If an abnormality occurs in CAN communications, IPDM E/ R holds the condition just before fail-safe status is
initiated until ignition switch is turned OFF. (If wipers we re operating in LO just before the initiation of fail-safe
status, they continue to operate in LO until ignition switch is turned OFF.)
COMBINATION SWITCH READING FUNCTION Refer to BCS-3, " System Description " .
CAN Communication System Description INFOID:0000000004306906
Refer to LAN-8, " System Description " .

Terminal and Reference Value for BCM " .
Terminal and Reference Value for IPDM E/R INFOID:0000000004306910
Refer to PG-24, " Terminal and Reference Value for IPDM E/R " .
How to Proceed with Trouble Diagnosis INFOID:0000000004306911
1. Confirm symptoms and customer complaint.
2. Understand operation description and function description. Refer to WW-3, " System Description " .
3. Perform preliminary check. Refer to WW-10, " Preliminary Check " .
4. Check symptom and repair or replace malfunctioning parts.
5. Does front wiper and washer operate normally ? If YES, GO TO 6. If NO, GO TO 4.
6. Inspection End.
Preliminary Check INFOID:0000000004306912
CHECK POWER SUPPLY AND GROUND CIRCUIT FOR BCM
Refer to BCS-15, " BCM Power Supply and Ground Circuit Inspection "
Item Description CONSULT-III Factory setting
WIPER SPEED SETTING Vehicle speed sensing type wiper control mode can be changed in this mode. ON
×
OFF — ALL SIGNALS Monitors all the signals.
SELECTION FROM MENU Selects items and monitor them. Monitor item Contents
IGN ON SW “ON/OFF” Displays “ignition switch ON (ON)/Other OFF or ACC (OFF)” status as judged from ignition
switch signal.
IGN SW CAN “ON/OFF” Displays “ignition switch ON (ON)/Other OFF or ACC (OFF)” status as judged from CAN com-
munication signal.
FR WIPER HI “ON/OFF” Displays “FRONT WI PER HI (ON)/Other (OFF)” status as judged from wiper switch signal.
FR WIPER LOW “ON/OFF” Displays “FRONT WIPER LOW (ON)/Other (OFF)” status as judged from wiper switch signal.

WW
N
O P
REAR WIPER AND WASHER SYSTEM
Component Parts and Har ness Connector Location INFOID:0000000004306934
System Description INFOID:0000000004306935
• The wiper switch (combination switch ) is composed of a combination of 5 output terminals and 5 input termi-
nals. Terminal combination status is read by the BCM (body control module) when switch is turned ON.
• The BCM controls rear wiper ON and INT (intermittent) operation.
Power is supplied at all times
• through 40A fusible link (letter g , located in fuse and fusible link box)
• to BCM terminal 70.
With the ignition switch in ON or START position, power is supplied
• through 15A fuse [No. 4, located in the fuse block (J/B)]
• to combination switch terminal 2
• through 10A fuse [No. 6, located in the fuse block (J/B)]
• to BCM terminal 38.
Ground is supplied
• to BCM terminal 67, and
• to combination switch terminal 12
• through grounds M57 and M61.
REAR WIPER OPERATION When the ignition switch is in the ON or START position, and the rear wiper switch is in the ON position, the
BCM detects a rear wiper ON request through the combi nation switch (wiper switch) reading function and con-
trols the rear wiper motor as follows.
Power is supplied
• through BCM terminal 55
• to rear wiper motor terminal 1.
Ground is supplied
• to rear wiper motor terminal 3