2009 INFINITI QX56 service

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INFINITI QX56 2009  Factory Service Manual 
EC-7
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SYMPTOM DIAGNOSIS  ..... .......................475
ENGINE CONTROL SYSTEM SYMPTOMS  .. ..475
Symptom Matrix Chart  ........................................ ..475

Page 1337 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-10
< BASIC INSPECTION >[VK56DE]
DIAGNOSIS AND REPAIR WORKFLOW
2.CHECK DTC*1
1. Check DTC*1 .
2. Perform the following procedure if DTC*
1  is displayed.
- Record DTC*
1  and freeze frame data*2 .

Page 1340 of 4171

INFINITI QX56 2009  Factory Service Manual 
INSPECTION AND ADJUSTMENTEC-13
< BASIC INSPECTION > [VK56DE]
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INSPECTION AND ADJUSTMENT
Basic InspectionINFOID:0000000003771294
1.INSPECTION START
1. Check service reco

Page 1349 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-22
< FUNCTION DIAGNOSIS >[VK56DE]
ENGINE CONTROL SYSTEM
Engine Control Comp onent Parts Location
INFOID:0000000003771302
1. ECM 2. Battery current sensor 3. Power steering pressure sensor
4. Ignit

Page 1352 of 4171

INFINITI QX56 2009  Factory Service Manual 
ENGINE CONTROL SYSTEMEC-25
< FUNCTION DIAGNOSIS > [VK56DE]
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1. EVAP canister purge volume control 
solenoid valve (view with engine 
cover removed) 2. EVAP service port

Page 1368 of 4171

INFINITI QX56 2009  Factory Service Manual 
ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-41
< FUNCTION DIAGNOSIS > [VK56DE]
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
IntroductionINFOID:0000000003771313
The ECM has an on board diag

Page 1369 of 4171

INFINITI QX56 2009  Factory Service Manual 
EC-42
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Therefore, when electrical controlled throttle and part
 of ECM related diagnoses are continuously detected as
NG for 5 trips, EC

Page 1370 of 4171

INFINITI QX56 2009  Factory Service Manual 
ON BOARD DIAGNOSTIC (OBD) SYSTEMEC-43
< FUNCTION DIAGNOSIS > [VK56DE]
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Data which are stored in the ECM memory, along with the 
1st trip DTC, are called 1st trip freeze