2010 INFINITI QX56 Factory Service Manual

technical specifications wheel coolant reservoir engine coolant battery capacity air conditioning

Load previous 8 pages

Page 1705 of 4210

INFINITI QX56 2010 Factory Service Manual EC-352
< COMPONENT DIAGNOSIS >[VK56DE]
P1574 ASCD VEHICLE SPEED SENSOR
OK or NG
OK >> GO TO 3.
NG >> Repair or replace.
3.CHECK COMBINATION METER FUNCTION
Check combination meter function.
Refer to M

Page 1706 of 4210

INFINITI QX56 2010 Factory Service Manual P1805 BRAKE SWITCHEC-353
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P1805 BRAKE SWITCH
DescriptionINFOID:0000000005149417
Brake switch signal is applied to the ECM through t
he s

Page 1707 of 4210

INFINITI QX56 2010 Factory Service Manual EC-354
< COMPONENT DIAGNOSIS >[VK56DE]
P1805 BRAKE SWITCH
Check voltage between ECM terminal 101 and ground under the fol-
lowing conditions.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2.CHECK STOP LAMP S

Page 1708 of 4210

INFINITI QX56 2010 Factory Service Manual P1805 BRAKE SWITCHEC-355
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connector

Page 1709 of 4210

INFINITI QX56 2010 Factory Service Manual EC-356
< COMPONENT DIAGNOSIS >[VK56DE]
P2100, P2103 THROTTLE
CONTROL MOTOR RELAY
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Component DescriptionINFOID:0000000005149422
Power supply for the throttle c

EC-356
< COMPONENT DIAGNOSIS >[VK56DE]
P2100, P2103 THROTTLE
CONTROL MOTOR RELAY
P2100, P2103 THROTTLE CONTROL MOTOR RELAY
Component DescriptionINFOID:0000000005149422
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
On Board Diagn osis LogicINFOID:0000000005149423
These self-diagnoses have the one trip detection logic.
FA I L - S A F E M O D E
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation ProcedureINFOID:0000000005149424
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
PROCEDURE FOR DTC P2100
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
4. If DTC is detected, go to EC-356, "
Diagnosis Procedure".
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, co nfirm that battery voltage is more than 8 V.
1. Turn ignition switch ON and wait at least 1 second.
2. Check DTC.
3. If DTC is detected, go to EC-356, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005149425
1.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2100
2100 Throttle control motor
relay circuit open ECM detects a voltage of power source for
throttle control motor is excessively low. • Harness or connectors
(Throttle control motor relay circuit is
open)
• Throttle control motor relay
P2103
2103 Throttle control motor
relay circuit short ECM detect the throttle control motor relay is
stuck ON. • Harness or connectors
(Throttle control motor relay circuit is
shorted)
• Throttle control motor relay
Engine operating 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.
Revision: April 20092010 QX56

Page 1710 of 4210

INFINITI QX56 2010 Factory Service Manual P2100, P2103 THROTTLE CONTROL MOTOR RELAYEC-357
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
2. Check voltage between ECM terminal 104 and ground with
CONSULT-III or tester.
OK or

Page 1711 of 4210

INFINITI QX56 2010 Factory Service Manual EC-358
< COMPONENT DIAGNOSIS >[VK56DE]
P2100, P2103 THROTTLE
CONTROL MOTOR RELAY
6.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
• Harness for open or short between

Page 1712 of 4210

INFINITI QX56 2010 Factory Service Manual P2101 ELECTRIC THROTTLE CONTROL FUNCTIONEC-359
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
DescriptionINFOID:0000000005149426
NOTE:
If DTC

P2101 ELECTRIC THROTTLE CONTROL FUNCTIONEC-359
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
DescriptionINFOID:0000000005149426
NOTE:
If DTC P2101 is displayed with DTC P2100 or 2119,
first perform the trouble diagnosis for DTC P2100
or P2119. Refer to EC-356
or EC-365.
Electric throttle control actuator consists of throttle control mo tor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
On Board Diagnosis LogicINFOID:0000000005149427
This self-diagnosis has the on e trip detection logic.
FA I L - S A F E M O D E
When the malfunction is detected, ECM ent ers fail-safe mode and the MIL lights up.
DTC Confirmation ProcedureINFOID:0000000005149428
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V when
engine is running.
1. Turn ignition switch ON and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Check DTC.
4. If DTC is detected, go to EC-359, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005149429
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2101
2101 Electric throttle control
performance Electric throttle control function does not oper-
ate properly. • Harness or connectors
(Throttle control motor circuit is open or
shorted)
• Electric throttle control actuator
Engine operating 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.
Revision: April 20092010 QX56

Load next 8 pages

Page: < prev 1-10 ... 1673-1680 1681-1688 1689-1696 1697-1704 1705-1712 1713-1720 1721-1728 1729-1736 1737-1744 ... 4216 next >

key set clock refuelling battery glove box trunk