NISSAN LATIO 2009 Service Repair Manual

DTC P0643 SENSOR POWER SUPPLY
EC-875
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
Wiring Diagram
INFOID:0000000004537383
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-876< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0643 SENSOR POWER SUPPLY
Diagnosis Procedure INFOID:00000000045373841.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-632, " 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

EC
NP
O OK >> GO TO 8.
NG >> GO TO 3. OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. OK >> GO TO 5.
NG >> Repair short to ground or short to power in harness or connectors. Component Inspection " .
OK or NG OK >> GO TO 6.
NG >> Replace camshaft position sensor (PHASE). Component Inspection " . Wiring Diagram "
78 Camshaft position sensor (PHASE) terminal 1
EC-782, " Wiring Diagram "
106 APP sensor terminal 4
EC-875, " Wiring Diagram "

OK >> GO TO 8.
NG >> GO TO 7. Throttle Valve Closed Position Learning " .
3. Perform EC-572, " 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-572, " Throttle Valve Closed Position Learning " .
4. Perform EC-572, " Idle Air Volume Learning " .
>> INSPECTION END .
>> INSPECTION END

EC
NP
O
DTC P0850 PNP SWITCH
Component Description INFOID:0000000004537385
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:0000000004537386
Specification data are reference values.
On Board Diagnosis Logic INFOID:0000000004537387
DTC Confirmation Procedure INFOID:0000000004537388
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-882, " 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.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to EC-882, " Diagnosis Procedure " .
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 1,100 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 3.5 - 31.8 msec
VHCL SPEED SE More than 64km/h (29 MPH)
Shift lever Suitable position

EC-880< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0850 PNP SWITCH
Overall Function Check INFOID:0000000004537389
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-882, " Diagnosis Procedure " .Condition (Shift lever) Voltage V (Known-good data)
P or N position (A/T, CVT)
Neutral position (M/T) Approx. 0
Except above BATTERY VOLTAGE
(11 - 14V) SEC910C

EC
NP
O
Wiring Diagram
INFOID:0000000004537390
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.

EC-882< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0850 PNP SWITCH
Diagnosis Procedure INFOID:0000000004537391
A/T 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. 4.
CHECK PNP SWITCH
Refer to AT-95, " Component Inspection " .
OK or NG OK >> GO TO 5.
NG >> Replace PNP switch. 5.
CHECK INTERMITTENT INCIDENT
Refer to EC-626 .
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 0VVoltage: Battery voltage
PBIB3002E
Continuity should exist.

EC
NP
O
>>
INSPECTION END
M/T MODELS OK >> GO TO 3.
NG >> GO TO 2. OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. .
OK or NG OK >> GO TO 5.
NG >> Replace PNP switch. .
>> INSPECTION END
CVT MODELS OBD-II Diagnostic Trouble Code (DTC) " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace. Voltage: Battery voltage

Yes >> GO TO 3.
No >> Refer to SC-9 .
OK >> GO TO 5.
NG >> GO TO 4. .
>> INSPECTION END
Continuity should exist.