2006 INFINITI QX56 Factory Service Manual

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Page 1393 of 3383

INFINITI QX56 2006 Factory Service Manual EC-182Revision: November 2009
DTC P0102, P0103 MAF SENSOR
2006 QX56
Wiring DiagramUBS00H18
BBWA1674E

Page 1394 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P0102, P0103 MAF SENSOREC-183
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Revision: November 2009 2006 QX56
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not

Page 1395 of 3383

INFINITI QX56 2006 Factory Service Manual EC-184Revision: November 2009
DTC P0102, P0103 MAF SENSOR
2006 QX56
3. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body. Refer to EC-150, "

Page 1396 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P0102, P0103 MAF SENSOREC-185
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6. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harne

Page 1397 of 3383

INFINITI QX56 2006 Factory Service Manual EC-186Revision: November 2009
DTC P0102, P0103 MAF SENSOR
2006 QX56
Component InspectionUBS00H1A
MASS AIR FLOW SENSOR With CONSULT-II
1. Reconnect all harness connectors disconnected.
2. Start engine

EC-186Revision: November 2009
DTC P0102, P0103 MAF SENSOR
2006 QX56
Component InspectionUBS00H1A
MASS AIR FLOW SENSOR With CONSULT-II
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Connect CONSULT-II and select “DATA MONITOR ” mode.
4. Select “MAS A/F SE-B1 ” and check indication under the follow-
ing conditions.
*: Check for linear voltage rise in response to engine being increased to about
4,000 rpm.
5. If the voltage is out of specification, proceed the following.
a. Check for the cause of uneven air flow through mass air flow sensor. Refer to following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system parts
b. If NG, repair or replace malfunctioning part and perform step 2 to 4 again. If OK, go to next step.
6. Turn ignition switch OFF.
7. Disconnect mass air flow sensor harness connector and reconnect it again.
8. Perform step 2 to 4 again.
9. If NG, clean or replace mass air flow sensor.
Without CONSULT-II
1. Reconnect all harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 51 (Mass air flow sensor signal) and ground.
*: Check for linear voltage rise in response to engine being increased to about
4,000 rpm.
4. If the voltage is out of specification, proceed the following.
a. Check for the cause of uneven air flow through mass air flow sensor. Refer to following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system parts
Condition MAS A/F SE-B1 (V)
Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal
operating temperature.) 1.0 - 1.3
2,500 rpm (Engine is warmed-up to
normal operating temperature.) 1.7 - 2.1
Idle to about 4,000 rpm 1.0 - 1.3 to Approx. 2.4*
PBIB2371E
ConditionMAS A/F SE-B1 (V)
Ignition switch ON (Engine stopped.) Approx. 0.4
Idle (Engine is warmed-up to normal
operating temperature.) 1.0 - 1.3
2,500 rpm (Engine is warmed-up to
normal operating temperature.) 1.7 - 2.1
Idle to about 4,000 rpm 1.0 - 1.3 to Approx. 2.4*
PBIB1106E

Page 1398 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P0102, P0103 MAF SENSOREC-187
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Revision: November 2009 2006 QX56
b. If NG, repair or replace malfunctioning part and perform step 2 to 3 again.
If OK, go to next step.
5.

Page 1399 of 3383

INFINITI QX56 2006 Factory Service Manual EC-188Revision: November 2009
DTC P0112, P0113 IAT SENSOR
2006 QX56
DTC P0112, P0113 IAT SENSORPFP:22630
Component DescriptionUBS00H1C
The intake air temperature sensor is built-into mass air flow sen

Page 1400 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P0112, P0113 IAT SENSOREC-189
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Revision: November 2009 2006 QX56
Wiring DiagramUBS00H1F
BBWA0879E

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