NISSAN LATIO 2010 Service Repair Manual

EC-346
< COMPONENT DIAGNOSIS >[HR16DE]
P0507 ISC SYSTEM
Is intake air leak detected?
YES >> Discover air leak location and repair.
NO >> GO TO 3.
3.REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Perform EC-23, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
>> INSPECTION END
Revision: January 20102010 Versa

P0603 ECM POWER SUPPLYEC-347
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P0603 ECM POWER SUPPLY
DescriptionINFOID:0000000005398508
ECM has the memory function of the DTC memory, the air-fuel ratio
feedback compensation value memory, the idle air volume learning
value memory, etc. even when the ignition switch is turned ON.
DTC LogicINFOID:0000000005398509
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON wait at least 10 seconds.
2. Turn ignition switch OFF and wait at least 5 minutes.
3. Turn ignition switch ON, wait at least 10 seconds.
4. Repeat steps 2 and 3 for five times.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-347, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005398510
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Erase DTC. Refer to “How to Erase DTC and 1st Trip DTC” in EC-84, "
Diagnosis Description".
3. Perform DTC CONFIRMATION PROCEDURE. Refer to EC-347, "
DTC Logic".
Is the 1st trip DTC P0603 displayed again?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform EC-23, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
PBIA9222J
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0603 Engine control module ECM back-up RAM system does not function
properly. •ECM
Revision: January 20102010 Versa

EC-348
< COMPONENT DIAGNOSIS >[HR16DE]
P0603 ECM POWER SUPPLY
>> INSPECTION END
Revision: January 20102010 Versa

P0605 ECMEC-349
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P0605 ECM
DescriptionINFOID:0000000005398511
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
DTC LogicINFOID:0000000005398512
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-350, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-350, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1. Turn ignition switch ON and wait at least 1 second.
2. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-350, "Diagnosis Procedure".
NO >> INSPECTION END
PBIA9222J
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0605 Engine control module A) ECM calculation function is malfunctioning.
•ECM
B) ECM EEP-ROM system is malfunctioning.
C) ECM self shut-off function is malfunctioning.
Revision: January 20102010 Versa

EC-350
< COMPONENT DIAGNOSIS >[HR16DE]
P0605 ECM
Diagnosis Procedure
INFOID:0000000005398513
1.INSPECTION START
1. Turn ignition switch ON.
2. Erase 1st trip DTC. Refer to “How to Erase DTC and 1st Trip DTC” in EC-84, "
Diagnosis Description".
3. Perform DTC CONFIRMATION PROCEDURE. Refer to EC-349, "
DTC Logic".
Is the 1st trip DTC P0605 displayed again?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform EC-23, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
>> INSPECTION END
Revision: January 20102010 Versa

P0607 ECMEC-351
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P0607 ECM
DescriptionINFOID:0000000005398514
CAN (Controller Area Network) is a serial communication line 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.
DTC LogicINFOID:0000000005398515
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-351, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000005398516
1.INSPECTION START
1. Turn ignition switch ON.
2. Erase DTC. Refer to “How to Erase DTC and 1st Trip DTC” in EC-84, "
Diagnosis Description".
3. Perform DTC CONFIRMATION PROCEDURE. Refer to EC-351, "
DTC Logic".
4. Check DTC.
Is the DTC P0607 displayed again?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform EC-23, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0607 CAN communication bus When detecting error during the initial diagnosis
of CAN controller of ECM.
•ECM
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EC-352
< COMPONENT DIAGNOSIS >[HR16DE]
P0643 SENSOR POWER SUPPLY
P0643 SENSOR POWER SUPPLY
DTC LogicINFOID:0000000005398517
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-353, "Diagnosis Procedure".
NO >> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0643 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.)
(TP sensor circuit is shorted.)
(Battery current sensor circuit is shorted.)
(PSP sensor circuit is shorted.)
[Camshaft position sens or (PHASE) circuit is
shorted.]
• Accelerator pedal position sensor
• Throttle position sensor
• Battery current sensor
• Power steering pressure sensor
• Camshaft position sensor (PHASE)
Revision: January 20102010 Versa

P0643 SENSOR POWER SUPPLYEC-353
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Wiring DiagramINFOID:0000000005398518
Diagnosis ProcedureINFOID:0000000005398519
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections E15, E24. Refer to EC-119, "
Ground Inspection".
Is the inspection result normal?
BBWA2649E
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EC-354
< COMPONENT DIAGNOSIS >[HR16DE]
P0643 SENSOR POWER SUPPLY
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ACCELERATOR PEDAL POSITION
SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 3.
3.CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair short to ground or short to power in harness or connectors.
4.CHECK COMPONENTS
Check the following.
• Camshaft position sensor (PHASE) (Refer to EC-266, "
Component Inspection".)
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace camshaft position sensor (PHASE).
5.CHECK TP SENSOR
Refer to EC-168, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 6.
6.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Perform EC-25, "
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
>> INSPECTION END
7.CHECK APP SENSOR
Refer to EC-395, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
APP sensor Ground Voltage
Connector Terminal
E12 4Ground Approx. 5 V
PBIA9606J
ECM Sensor
Connector Terminal NameConnector Terminal
F11 72 Electric throttle control actuator
F72
78 CMP sensor (PHASE) F211
E16 106 APP sensor E124
Revision: January 20102010 Versa

P0643 SENSOR POWER SUPPLYEC-355
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8.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-395, "
Special Repair Requirement".
>> INSPECTION END
9.CHECK INTERMITTENT INCIDENT
Refer to EC-114, "
Diagnosis Procedure".
>> INSPECTION END
Revision: January 20102010 Versa