2009 INFINITI QX56 Factory Service Manual

technical specifications child restraint deactivate passenger airbag refuelling brake winter tyres

Page 1609 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-282
< COMPONENT DIAGNOSIS >[VK56DE]
P0605 ECM
P0605 ECM
Component DescriptionINFOID:0000000003771563
The ECM consists of a microcomputer and connectors for signal
input and output and for power su

EC-282
< COMPONENT DIAGNOSIS >[VK56DE]
P0605 ECM
P0605 ECM
Component DescriptionINFOID:0000000003771563
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagn
osis LogicINFOID:0000000003771564
This self-diagnosis has one or two trip detection logic.
FAIL-SAFE MODE
ECM enters fail-safe mode when the malfunction A is detected.
DTC Confirmation ProcedureINFOID:0000000003771565
Perform PROCEDURE FOR MALFUNCTION A first. If th e 1st trip DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION
B, perform PROCEDURE FOR MALFUNCTION C.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
PROCEDURE FOR MALFUNCTION A
1. Turn ignition switch ON.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-283, "Diagnosis Procedure"
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.
4. If 1st trip DTC is detected, go to EC-283, "Diagnosis Procedure"
.
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.
PBIB1164E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0605
0605 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.
Detected items Engine operation condition in fail-safe mode
Malfunction A ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx.
5 degrees) by the return spring.
ECM deactivates ASCD operation.
Revision: December 20092009 QX56

Page 1610 of 4171

INFINITI QX56 2009 Factory Service Manual
P0605 ECMEC-283
< COMPONENT DIAGNOSIS > [VK56DE]
C
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3. Repeat step 2 for 32 times.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to
EC-283, "Diagnosis Proced

Page 1611 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-284
< COMPONENT DIAGNOSIS >[VK56DE]
P0607 ECM
P0607 ECM
DescriptionINFOID:0000000003771330
CAN (Controller Area Network) is a serial communication
line for real time application. It is an on-vehi

EC-284
< COMPONENT DIAGNOSIS >[VK56DE]
P0607 ECM
P0607 ECM
DescriptionINFOID:0000000003771330
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 s peed 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 CA N 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 Diagn osis LogicINFOID:0000000003771331
This self-diagnosis has the one trip detection logic.
DTC Confirmation ProcedureINFOID:0000000003771332
1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to EC-284, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003771333
1.INSPECTION START
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELF-DIAG RESULTS” mode with CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
See EC-284, "DTC Confirmation Procedure"
.
5. Is the DTC P0607 displayed again?
With GST
1. Turn ignition switch ON.
2. Select Service $04 with GST.
3. Perform DTC Confirmation Procedure.
See EC-284, "DTC Confirmation Procedure"
.
4. Is the DTC P0607 displayed again?
Ye s o r N o
Ye s > > G O T O 2 .
No >> INSPECTION END
2.REPLACE ECM
1. Replace ECM.
2. Perform initialization of IVIS (NATS) system and regist ration of all IVIS (NATS) ignition key IDs. Refer to
SEC-6, "ECM RE-COMMUNICATING FUNCT ION : Special Repair Requirement"
.
3. Perform EC-17, "VIN Registration"
.
4. Perform EC-18, "Accelerator Pedal Released Position Learning"
.
5. Perform EC-18, "Throttle Valve Closed Position Learning"
.
6. Perform EC-18, "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 of CAN controller of ECM.
ECM
Revision: December 20092009 QX56

Page 1612 of 4171

INFINITI QX56 2009 Factory Service Manual
P0643 SENSOR POWER SUPPLYEC-285
< COMPONENT DIAGNOSIS > [VK56DE]
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P0643 SENSOR POWER SUPPLY
On Board Diagnosis LogicINFOID:0000000003771567
This self-diagnosis has the

Page 1613 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-286
< COMPONENT DIAGNOSIS >[VK56DE]
P0643 SENSOR POWER SUPPLY
NG >> Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) s

Page 1614 of 4171

INFINITI QX56 2009 Factory Service Manual
P0643 SENSOR POWER SUPPLYEC-287
< COMPONENT DIAGNOSIS > [VK56DE]
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6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal position assembly.
2. Perform EC-18

Page 1615 of 4171

INFINITI QX56 2009 Factory Service Manual
EC-288
< COMPONENT DIAGNOSIS >[VK56DE]
P0850 PNP SWITCH
P0850 PNP SWITCH
Component DescriptionINFOID:0000000003771570
When the selector lever position is P or N, trans
mission range signal from the T

EC-288
< COMPONENT DIAGNOSIS >[VK56DE]
P0850 PNP SWITCH
P0850 PNP SWITCH
Component DescriptionINFOID:0000000003771570
When the selector lever position is P or N, trans
mission range signal from the TCM is sent to ECM.
On Board Diagnosis LogicINFOID:0000000003771571
DTC Confirmation ProcedureINFOID:0000000003771572
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
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-289, "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-289, "Diagnosis Procedure"
.
Overall Function CheckINFOID:0000000003771573
Use this procedure to check the overall function of t he transmission range signal circuit. During this check, a
1st trip DTC might not be confirmed.
WITH GST
1. Turn ignition switch ON.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0850
0850 Park/neutral position
switch The transmission range signal is not changed in
the process of engine starting and driving. Harness or connectors
[The transmission range signal circuit is
open or shorted.]
Combination meter
TCM
Position (Selector lever) Known-good signal
N or P position ON
Except the above position OFF
ENG SPEED 1,000 - 6,375 rpm
COOLAN TEMP/S More than 70 °C (158 °F)
B/FUEL SCHDL 2.0 - 31.8 msec
VHCL SPEED SE More than 64 km/h (40 MPH)
Selector lever Suitable position
Revision: December 20092009 QX56

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INFINITI QX56 2009 Factory Service Manual
P0850 PNP SWITCHEC-289
< COMPONENT DIAGNOSIS > [VK56DE]
C
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2. Check voltage between ECM terminal 102 (transmission range
signal) and ground under the following conditions

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