ignition INFINITI QX56 2006 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2006, Model line: QX56, Model: INFINITI QX56 2006Pages: 3383, PDF Size: 51.76 MB
Page 1695 of 3383
EC-484Revision: November 2009
DTC P1225 TP SENSOR
2006 QX56
Diagnostic ProcedureUBS00H94
1. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.
OK or NG
OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle control actuator inside.
2. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-78, "
Throttle Valve Closed Position Learning" .
3. Perform EC-78, "
Idle Air Volume Learning" .
>> INSPECTION END
Removal and InstallationUBS00H95
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-17, "INTAKE MANIFOLD" .
BBIA0364E
Page 1696 of 3383
DTC P1226 TP SENSOREC-485
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Revision: November 2009 2006 QX56
DTC P1226 TP SENSORPFP:16119
Component DescriptionUBS00H96
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
On Board Diagnosis LogicUBS00H97
The MIL will not light up for this diagnosis.
DTC Confirmation ProcedureUBS00H98
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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR ” mode with CONSULT-II.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Repeat steps 3 and 4 for 32 times.
6. If 1st trip DTC is detected, go to EC-486, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P1226
1226 Closed throttle position learning
performance Closed throttle position learning is not performed
successfully, repeatedly.
Electric throttle control actuator
(TP sensor 1 and 2)
SEF058Y
Page 1697 of 3383
EC-486Revision: November 2009
DTC P1226 TP SENSOR
2006 QX56
Diagnostic ProcedureUBS00H99
1. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is caught between the throttle valve and the housing.
OK or NG
OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle control actuator inside.
2. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-78, "
Throttle Valve Closed Position Learning" .
3. Perform EC-78, "
Idle Air Volume Learning" .
>> INSPECTION END
Removal and InstallationUBS00H9A
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-17, "INTAKE MANIFOLD" .
BBIA0364E
Page 1698 of 3383
DTC P1564 ICC STEERING SWITCHEC-487
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Revision: November 2009 2006 QX56
DTC P1564 ICC STEERING SWITCHPFP:25551
Component DescriptionUBS00L1M
ICC steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of
switch, and determines which button is operated.
Refer to ACS-6, "
DESCRIPTION" for the ICC function.
CONSULT-II Reference Value in Data Monitor ModeUBS00L1N
Specification data are reference values.
On Board Diagnosis LogicUBS00L1O
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
EC-457, "
DTC P0605 ECM" .
PBIB2640E
MONITOR ITEM CONDITIONSPECIFICATION
MAIN SW
Ignition switch: ON MAIN switch: Pressed
ON
MAIN switch: Released OFF
CANCEL SW
Ignition switch: ON CANCEL switch: Pressed
ON
CANCEL switch: Released OFF
RESUME/ACC SW
Ignition switch: ON RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch:
Released OFF
SET SW
Ignition switch: ON SET/COAST switch: Pressed
ON
SET/COAST switch: Released OFF
DIST SW
Ignition switch: ON DISTANCE switch: Pressed
ON
DISTANCE switch: Released OFF
DTC No.Trouble diagnosis
name DTC detecting condition
Possible cause
P1564
1564 ICC steering switch
An excessively high voltage signal from the
ICC steering switch is sent to ECM.
ECM detects that input signal from the ICC
steering switch is out of the specified range.
ECM detects that the ICC steering switch is
stuck ON.
Harness or connectors
(The switch circuit is open or shorted.)
ICC steering switch
Combination switch (spiral cable)
ECM
Page 1699 of 3383
EC-488Revision: November 2009
DTC P1564 ICC STEERING SWITCH
2006 QX56
DTC Confirmation ProcedureUBS00L1P
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.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR ” mode with CONSULT-II.
3. Wait at least 10 seconds.
4. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
5. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 seconds.
7. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
8. Press DISTANCE switch for at least 10 seconds, then release it and wait at least 10 seconds.
9. If DTC is detected, go to EC-490, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
Page 1701 of 3383
EC-490Revision: November 2009
DTC P1564 ICC STEERING SWITCH
2006 QX56
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureUBS00L1R
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-150, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
TER-
MINAL NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
67 B Sensor ground [Engine is running]
Warm-up condition
Idle speed
Approximately 0V
99 G/Y ICC steering switch [Ignition switch: ON]
ICC steering switch: OFF
Approximately 4.3V
[Ignition switch: ON]
MAIN switch: Pressed Approximately 0V
[Ignition switch: ON]
CANCEL switch: Pressed Approximately 1.3V
[Ignition switch: ON]
RESUME/ACCELERATE switch: Pressed Approximately 3.7V
[Ignition switch: ON]
SET/COAST switch: Pressed Approximately 3V
[Ignition switch: ON]
DISTANCE switch: Pressed Approximately 2.2V
BBIA0354E
Page 1702 of 3383
DTC P1564 ICC STEERING SWITCHEC-491
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Revision: November 2009 2006 QX56
2. CHECK ICC STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW ”, “CANCEL SW ”, “RESUME/ACC SW ”, “SET
SW ” and “DIST SW ” in “DATA MONITOR” mode with CON-
SULT-II.
3. Check each item indication under the following conditions.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 99 and ground with press- ing each button.
OK or NG
OK >> GO TO 8.
NG >> GO TO 3.
Switch Monitor item Condition Indication
MAIN switch MAIN SWPressed ON
Released OFF
CANCEL switch CANCEL SWPressed ON
Released OFF
RESUME/ACCELERATE
switch RESUME/ACC SWPressed ON
Released OFF
SET/COAST switch SET SW Pressed ON
Released OFF
DISTANCE switch DIST SW Pressed ON
Released OFF
MBIB0064E
Switch Condition Voltage [V]
MAIN switch Pressed
Approx. 0
Released Approx. 4.3
CANCEL switch Pressed
Approx. 1.3
Released Approx. 4.3
RESUME/ACCELERATE
switch Pressed
Approx. 3.7
Released Approx. 4.3
SET/COAST switch Pressed
Approx. 3.0
Released Approx. 4.3
DISTANCE switch Pressed
Approx. 2.2
Released Approx. 4.3
PBIB0311E
Page 1703 of 3383
EC-492Revision: November 2009
DTC P1564 ICC STEERING SWITCH
2006 QX56
3. CHECK ICC STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect combination switch harness connector.
4. Check harness continuity between combination switch terminal 15 and ECM terminal 67. Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Harness connectors E5, F14
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK ICC STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 99 and combination switch terminal 14. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK ICC STEERING SWITCH
Refer to EC-493, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace ICC steering switch. Continuity should exist.
Continuity should exist.
Page 1705 of 3383
EC-494Revision: November 2009
DTC P1564 ASCD STEERING SWITCH
2006 QX56
DTC P1564 ASCD STEERING SWITCHPFP:25551
Component DescriptionUBS00L0W
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-29, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeUBS00L0X
Specification data are reference values.
On Board Diagnosis LogicUBS00L0Y
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
EC-457, "
DTC P0605 ECM".
PBIB2640E
MONITOR ITEM CONDITIONSPECIFICATION
MAIN SW
Ignition switch: ON MAIN switch: Pressed
ON
MAIN switch: Released OFF
CANCEL SW
Ignition switch: ON CANCEL switch: Pressed
ON
CANCEL switch: Released OFF
RESUME/ACC SW
Ignition switch: ON RESUME/ACCELERATE switch: Pressed ON
RESUME/ACCELERATE switch: Released OFF
SET SW
Ignition switch: ON SET/COAST switch: Pressed
ON
SET/COAST switch: Released OFF
DTC No. Trouble Diagnosis Name DTC Detecting ConditionPossible Cause
P1564
1564 ASCD steering switch
An excessively high voltage signal from the ASCD
steering switch is sent to ECM.
ECM detects that input signal from the ASCD
steering switch is out of the specified range.
ECM detects that the ASCD steering switch is
stuck ON.
Harness or connectors
(The switch circuit is open or
shorted.)
ASCD steering switch
Combination meter (spiral
cable)
ECM
Page 1706 of 3383
DTC P1564 ASCD STEERING SWITCHEC-495
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Revision: November 2009 2006 QX56
DTC Confirmation ProcedureUBS00L0Z
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.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR ” mode with CONSULT-II.
3. Wait at least 10 seconds.
4. Press MAIN switch for at least 10 seconds, then release it and wait at least 10 seconds.
5. Press CANCEL switch for at least 10 seconds, then release it and wait at least 10 seconds.
6. Press RESUME/ACCELERATE switch for at least 10 seconds, then release it and wait at least 10 sec- onds.
7. Press SET/COAST switch for at least 10 seconds, then release it and wait at least 10 seconds.
8. If DTC is detected, go to EC-497, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.