NISSAN LATIO 2009 Service Repair Manual

EC
NP
O
DTC P0607 ECM
Description INFOID:0000000004501091
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
On Board Diagnosis Logic INFOID:0000000004306009
This self-diagnosis has the one trip detection logic (A/T and CVT).
The MIL will not light up for this self-diagnosis (M/T).
DTC Confirmation Procedure INFOID:0000000004306010
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-1395, " Diagnosis Procedure " .
Diagnosis Procedure INFOID:0000000004306011DTC Confirmation Procedure " .
3. Is the 1st trip DTC P0607 displayed again?
Yes or No Yes >> GO TO 2.
No >> INSPECTION END ECM Re-communicating Function " .
3. Perform EC-1084, " VIN Registration " .
4. Perform EC-1084, " Accelerator Pedal Released Position Learning " .
5. Perform EC-1084, " Throttle Valve Closed Position Learning " .
6. Perform EC-1084, " Idle Air Volume Learning " .
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0607
0607 CAN communication bus
When detecting error during the initial diagno-
sis for CAN controller of each control unit. • ECM

Diagnosis Procedure " .
DTC No.
Trouble diagnosis
name DTC detecting condition Possible cause
P0643
0643 Sensor power supply
circuit short ECM detects a voltage of power source for
sensor is excessively low or high. • Harness or connectors
(APP sensor 1 circuit is shorted.)
(Throttle position sensor circuit is shorted.)
[Camshaft position sensor (PHASE) circuit is
shorted.]
• Accelerator pedal position sensor
• Throttle position sensor
• Camshaft position sensor (PHASE) Engine operation condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) b y the return
spring.

DTC P0643 SENSOR POWER SUPPLY
EC-1397
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
Wiring Diagram
INFOID:0000000004500269
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground. BBWA2649E

EC-1398< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0643 SENSOR POWER SUPPLY
Diagnosis Procedure INFOID:00000000045002701.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-1144, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
72 V Sensor power supply
(Throttle position sensor) [Ignition switch: ON]
Approximately 5V
78 O Sensor power supply
[Camshaft position sensor
(PHASE)] [Ignition switch: ON]
Approximately 5V
102 SB Sensor power supply
(APP sensor 2) [Ignition switch: ON]
Approximately 5V
103 GR Accelerator pe
dal position
sensor 2 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.3 - 0.6V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 1.95 - 2.4V
104 Y Sensor ground
(APP sensor 2) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
106 P Sensor power supply
(APP sensor 1) [Ignition switch: ON]
Approximately 5V
110 G Accelerator pe
dal position
sensor 1 [Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully released 0.6 - 0.9V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully depressed 3.9 - 4.7V
111 R Sensor ground
(APP sensor 1) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E

DTC P0643 SENSOR POWER SUPPLY
EC-1399
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O 2.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminal 4 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 8.
NG >> GO TO 3. 3.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 4 and ECM terminal 106.
Refer to Wiring Diagram.
OK or NG OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. 4.
CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
OK or NG OK >> GO TO 5.
NG >> Repair short to ground or short to power in harness or connectors. 5.
CHECK CAMSHAFT POSITI ON SENSOR (PHASE)
Refer to EC-1303, " Component Inspection " .
OK or NG OK >> GO TO 6.
NG >> Replace camshaft position sensor (PHASE). 6.
CHECK THROTTLE POSITION SENSOR
Refer to EC-1201, " Component Inspection " . BBIA0705E
Voltage: Approximately 5V
PBIA9606J
Continuity should exist.
ECM terminal Sensor terminal Reference Wiring Diagram 72 Throttle position sensor terminal 1 EC-1477, " Wiring Diagram "
78 Camshaft position sensor (PHASE) terminal 1
EC-1300, " Wiring Diagram "
106 APP sensor terminal 4
EC-1397, " Wiring Diagram "

OK >> GO TO 8.
NG >> GO TO 7. Throttle Valve Closed Position Learning " .
3. Perform EC-1084, " Idle Air Volume Learning " .
>> INSPECTION END Component Inspection " .
OK or NG OK >> GO TO 10.
NG >> GO TO 9. Accelerator Pedal Released Position Learning " .
3. Perform EC-1084, " Throttle Valve Closed Position Learning " .
4. Perform EC-1084, " Idle Air Volume Learning " .
>> INSPECTION END .
>> INSPECTION END

EC
NP
O
DTC P0850 PNP SWITCH
Component Description INFOID:0000000004500271
When the shift lever position is P or N (A/T, CVT), Neut ral (M/T), park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
CONSULT-III Reference Val ue in Data Monitor Mode INFOID:0000000004500272
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004500273
DTC Confirmation Procedure INFOID:0000000004500274
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode wit h CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.
If NG, go to EC-1404, " Diagnosis Procedure " .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive seconds. MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW • Ignition switch: ON Shift lever: P or N (A/T, CVT),
Neutral (M/T) ON
Shift lever: Except above OFF DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0850
0850 Park/neutral position switch The signal of the park/neutral position (PNP)
switch is not changed in the process of en-
gine starting and driving. • Harness or connectors
[Park/neutral position (PNP) switch circuit
is open or shorted.]
• Park/neutral position (PNP) switch
• TCM (CVT models) Position (Shift lever) Known-good signal
N or P position (A/T, CVT)
Neutral position (M/T) ON
Except above OFF
ENG SPEED More than 1,200 rpm (CVT) More than 1,450 rpm (A/T)
More than 1,900 rpm (M/T)
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 2.4 - 31.8 msec (CVT) 1.4 - 31.8 msec (A/T)
1.7 - 31.8 msec (M/T)

EC-1402< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0850 PNP SWITCH
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to EC-1404, " Diagnosis Procedure " .
Overall Function Check INFOID:0000000004500275
Use this procedure to check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.
WITH GST
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 69 (PNP switch signal) and ground under the following conditions.
3. If NG, go to EC-1404, " Diagnosis Procedure " .
VHCL SPEED SE More than 64km/h (29 MPH)
Shift lever Suitable position Condition (Shift lever) Voltage V (Known-good data)
P or N position (A/T, CVT)
Neutral position (M/T) BATTERY VOLTAGE
(11 - 14V)
Except above Approx. 0 SEC910C

EC
NP
O
Wiring Diagram
INFOID:0000000004500276
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals wh en measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground. B

EC-1404< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0850 PNP SWITCH
Diagnosis Procedure INFOID:0000000004500277
A/T MODELS AND CVT MODELS 1.
CHECK PNP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect PNP switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between PNP switch terminal 1 and ground with CONSULT-III or tester.
OK or NG OK >> GO TO 3.
NG >> GO TO 2. 2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E8, F8
• Harness for open or short between PNP switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors. 3.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between PNP switch terminal 2 and ECM terminal 69. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. TERMI-
NAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
69 L Park/neutral position
(PNP) switch [Ignition switch: ON]
• Shift lever: P or N (A/T, CVT), Neutral (M/T) BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
• Except above Approximately 0V A/T CVT
Voltage: Battery voltage PBIB3002E JMBIA2080ZZ
Continuity should exist.