2011 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2011 Factory Service Manual
DIAGNOSIS AND REPAIR WORKFLOWEC-137
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Will CONSULT-III be used?
YES >> GO TO 7.
NO >> GO TO 9.
7.PERFORM SPEC IN DATA MONITOR MODE
WITH CO

DIAGNOSIS AND REPAIR WORKFLOWEC-137
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Will CONSULT-III be used?
YES >> GO TO 7.
NO >> GO TO 9.
7.PERFORM SPEC IN DATA MONITOR MODE
WITH CONSULT-III
Check that “MAS A/F SE-B1 ”, “B/FUEL SCHDL”, “A/F ALPHA-B1” and “A/F ALPHA-B2” are within the SP
value using “SPEC” in “DATA MONITOR” mode with CONSULT-III. Refer to EC-161, "
Component Function
Check".
Is the measurement value within the SP value?
YES >> GO TO 9.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Detect malfunctioning part according to EC-162, "
Diagnosis Procedure".
Is a malfunctioning part detected?
YES >> GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING SY STEM BY SYMPTOM TABLE
Detect malfunctioning system according to EC-524, "
Symptom Table" based on the confirmed symptom in
step 4, and determine the trouble diagnosis or der based on possible causes and symptoms.
>> GO TO 10.
10.DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE
Inspect according to Diagnosis Procedure of the system.
NOTE:
The Diagnosis Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnosis Procedure. For details, refer to GI-43, "
Circuit Inspec-
tion".
Is a malfunctioning part detected?
YES >> GO TO 11.
NO >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT-III. Refer to EC-72, "
Reference Value".
11 .REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it. Re fer to “How to Erase DTC and 1st Trip DTC” in EC-63,
"CONSULT-III Function" or EC-60, "On Board Diagnosis Function".
>> GO TO 12.
12.FINAL CHECK
When DTC was detected in step 2, perform DTC CONFIRMATION PROCEDURE or Component Function
Check again, and then check that the malfunction have been completely repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
Is DTC detected and does symptom remain?
YES-1 >> DTC is detected: GO TO 10.
YES-2 >> Symptom remains: GO TO 6.
NO >> Before returning the vehicle to the custom er, always erase unnecessary DTC in ECM and TCM
(Transmission Control Module). (Refer to “How to Erase DTC and 1st Trip DTC” in EC-63,
"CONSULT-III Function" or EC-60, "On Board Diagnosis Function".) If the completion of SRT is
Revision: 2010 May2011 QX56

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INFINITI QX56 2011 Factory Service Manual
EC-138
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DIAGNOSIS AND REPAIR WORKFLOW
needed, drive vehicle under the specific driving pattern. Refer to
EC-157, "SRT Set Driving Pat-
tern".
Diagnostic Work SheetINFOID:

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INFINITI QX56 2011 Factory Service Manual
BASIC INSPECTIONEC-139
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BASIC INSPECTION
Work ProcedureINFOID:0000000006217739
1.INSPECTION START
1. Check service records for any recent

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INFINITI QX56 2011 Factory Service Manual
EC-140
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BASIC INSPECTION
2. Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no
load, then run engine at idle speed for approximately 1 minute.
3. Check idle spee

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INFINITI QX56 2011 Factory Service Manual
BASIC INSPECTIONEC-141
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For specification, refer to
EC-538, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO

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INFINITI QX56 2011 Factory Service Manual
EC-142
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BASIC INSPECTION
2. Perform initialization of IVIS (NATS) system and regist
ration of all IVIS (NATS) ignition key IDs. Refer to
SEC-51, "
ECM : Work Procedure".
>

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INFINITI QX56 2011 Factory Service Manual
ADDITIONAL SERVICE WHEN REPLACING ECMEC-143
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ADDITIONAL SERVICE WHEN REPLACING ECM
DescriptionINFOID:0000000006217740
When replacing ECM,

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INFINITI QX56 2011 Factory Service Manual
EC-144
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ADDITIONAL SERVICE WHEN REPL
ACING VVEL CONTROL MODULE
ADDITIONAL SERVICE WHEN REPLACING VVEL CONTROL MODULE
DescriptionINFOID:0000000006217742
When replacing VVEL

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