2006 INFINITI QX56 Factory Service Manual

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Page 1737 of 3383

INFINITI QX56 2006 Factory Service Manual EC-526Revision: November 2009
DTC P1805 BRAKE SWITCH
2006 QX56
3. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Fuse block (J/B) connector M60
10A fuse
Harness for o

Page 1738 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P1805 BRAKE SWITCHEC-527
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Revision: November 2009 2006 QX56
Component InspectionUBS00HC3
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.
2. Check contin

Page 1739 of 3383

INFINITI QX56 2006 Factory Service Manual EC-528Revision: November 2009
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2006 QX56
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAYPFP:16119
Component DescriptionUBS00N77
Power supply for the throttle

EC-528Revision: November 2009
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2006 QX56
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAYPFP:16119
Component DescriptionUBS00N77
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.
CONSULT-II Reference Value in Data Monitor ModeUBS00N78
Specification data are reference values.
On Board Diagnosis LogicUBS00N79
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MlL lights up.
DTC Confirmation ProcedureUBS00N7A
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
PROCEDURE FOR DTC P2100 With CONSULT-II
1. Turn ignition switch ON and wait at least 2 seconds.
2. Select “DATA MONITOR ””mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to EC-531, "
Diagnostic Procedure" .
With GST
Follow the procedure “With CONSULT-II” above.
MONITOR ITEM CONDITIONSPECIFICATION
THRTL RELAY
Ignition switch: ON ON
DTC No. Trouble diagnosis nameDTC 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.
SEF058Y

Page 1740 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAYEC-529
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Revision: November 2009 2006 QX56
PROCEDURE FOR DTC P2103
TESTING CONDITION:
Before performing the following procedure, co

Page 1741 of 3383

INFINITI QX56 2006 Factory Service Manual EC-530Revision: November 2009
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2006 QX56
Wiring DiagramUBS00N7B
BBWA2100E

Page 1742 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAYEC-531
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Revision: November 2009 2006 QX56
Specification data are reference values and are measured between each terminal and groun

Page 1743 of 3383

INFINITI QX56 2006 Factory Service Manual EC-532Revision: November 2009
DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY
2006 QX56
2. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1. Disconnect ECM harness connector.
2. Disconnect I

Page 1744 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAYEC-533
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Revision: November 2009 2006 QX56
7. CHECK INTERMITTENT INCIDENT
Refer to EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT IN

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