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Nissan Armada 2025-2026 Service and Repair Manual: Engine Control System

Symptom Table

SYSTEM — BASIC ENGINE CONTROL SYSTEM

  SYMPTOM Reference page
HARD/NO START/RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT SPARK KNOCK/DETONATION LACK OF POWER/POOR ACCELERATION HIGH IDLE/LOW IDLE ROUGH IDLE/HUNTING IDLING VIBRATION SLOW/NO RETURN TO IDLE OVERHEATS/WATER TEMPERATURE HIGH EXCESSIVE FUEL CONSUMPTION EXCESSIVE OIL CONSUMPTION BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Low pressure fuel pump circuit 1 1 2 3 2   2 2     3   2 Component Function Check
Fuel pressure regulator system 3 3 4 4 4 4 4 4 4   4     Work Procedure
Fuel injector circuit 1 1 2 3 2   2 2     2     Component Function Check
Evaporative emission system 3 3 4 4 4 4 4 4 4   4     System Description
FRP sensor circuit 1 1 2 2 2 2 2 2

DTC Description

DTC Description

DTC Description
High pressure fuel pump circuit 4 3 DTC Description
Air Positive crankcase ventilation system 3 3 4 4 4 4 4 4 4   4 1   Inspection
Incorrect idle speed adjustment       1 1 1 1   1     Work Procedure
Electric throttle control actuator 1 1 2 3 3 2 2 2 2   2   2

DTC Description

DTC Description
Ignition Incorrect ignition timing adjustment 3 3 1 1 1   1 1     1     Work Procedure
Ignition circuit 1 1 2 2 2   2 2     2     Component Function Check
Main power supply and ground circuit 2 2 3 3 3   3 3   2 3   Diagnosis Procedure
Mass air flow sensor circuit 1 1 2 2 2   2 2     2    

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Engine coolant temperature sensor circuit 3 3 3      

DTC Description

DTC Description

DTC Description
Air fuel ratio (A/F) sensor 1 circuit            

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Throttle position sensor circuit     2 2      

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Accelerator pedal position sensor circuit     3 2 1            

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Heated oxygen sensor 2 circuit 6 6 6 6 5

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Knock sensor circuit     2               3    

DTC Description

DTC Description

DTC Description

DTC Description
Engine oil temperature sensor circuit 4 2       3    

DTC Description

DTC Description

DTC Description
Engine oil pressure sensor circuit 4 4 3 3 3     3     DTC Description
Crankshaft position sensor circuit 2 2           DTC Description
Intake camshaft position sensor circuit 3 2 3  

DTC Description

DTC Description
Exhaust camshaft position sensor circuit 2 2   3   3 3          

DTC Diagnosis Procedure

DTC Diagnosis Procedure
Turbocharger boost sensor circuit 3 3

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Manifold absolute pressure sensor circuit 2

DTC Description

DTC Description
vehicle speed signal circuit   2 3   3           3     DTC Description
ECM 2 2 3 3 3 3 3 3 3 3 3    
Electric intake valve timing control module circuit 3 3 3  

Diagnosis Procedure

DTC Diagnosis Procedure

DTC Diagnosis Procedure

DTC Description
Electric intake valve timing control actuator circuit 3  

DTC Diagnosis Procedure

DTC Diagnosis Procedure

DTC Diagnosis Procedure

DTC Diagnosis Procedure

DTC Diagnosis Procedure

DTC Diagnosis Procedure
Exhaust valve timing control solenoid valve circuit 2 2 2   2   2 2          

DTC Description

DTC Description

DTC Description

DTC Description
Transmission range switch     3   3   3 3     3     DTC Description
Refrigerant pressure sensor circuit   2   3 3   4     Component Function Check
Electric wastegate control actuator circuit 1

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description

DTC Description
Electrical load signal circuit             3           Component Function Check
Air conditioner circuit 2 2 3 3 3 3 3 3 3   3   2 Work Flow
ABS actuator and electric unit (control unit) 4 Work Flow
Turbochager bypass control valve circuit     3   3                  
Recircuration valve circuit         1                  
Cooling fan control module circuit 5 5 5 5 5   5 5 5 4 5      
Battery current sensor circuit           4 5 5            

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

  SYMPTOM Reference page
HARD/NO START/RESTART (EXCP. HA) ENGINE STALL HESITATION/SURGING/FLAT SPOT SPARK KNOCK/DETONATION LACK OF POWER/POOR ACCELERATION HIGH IDLE/LOW IDLE ROUGH IDLE/HUNTING IDLING VIBRATION SLOW/NO RETURN TO IDLE OVERHEATS/WATER TEMPERATURE HIGH EXCESSIVE FUEL CONSUMPTION EXCESSIVE OIL CONSUMPTION BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel tank 5 5                       FUEL SYSTEM : Inspection
Fuel piping 5 5 5 5 5 5
Vapor lock                        
Valve deposit 5 5 5 5   5 5     5
Poor fuel (Heavy weight gasoline, Low octane)      
Air Air duct   5 5   5   5 5     5     Inspection
Air cleaner Inspection

Air leakage from air duct

(Mass air flow sensor — electric throttle control actuator)
5 5 5 5

Exploded View

Exploded View
Electric throttle control actuator DTC Description
Air leakage from intake manifold/Collector/Gasket

Exploded View

Exploded View
Electric recircuration         5                  
Air leakage from recircuration         1                  
Cranking Battery 1 1 1   1   1 1     1   1 How to Handle Battery
Alternator circuit

Work Flow (With EXP-800 NI or GR8-1200 NI)

Work Flow (Without EXP-800 NI or GR8-1200 NI)
Starter circuit 3            

Diagnosis Procedure

Diagnosis Procedure
Signal plate 6 Exploded View
 
Transmission range switch 4                          
Engine Cylinder head 5 5 5 5 5   5 5     5     Inspection
Cylinder head gasket 4 3  
Cylinder block 6 6 6 6 6 6 6   6 4 Inspection
Piston
Piston ring
Connecting rod  
Bearing
Crankshaft
Valve mechanism Timing chain 5 5 5 5 5   5 5     5     Inspection
Camshaft Inspection
Intake valve timing control System Description
Exhaust valve timing control System Description
Intake valve 3 Inspection
Exhaust valve
Exhaust Tube/Muffler/Gasket 5 5 5 5 5   5 5     5    

EXHAUST SYSTEM : Exploded View

Exploded View
Three way catalyst
Turbocharger         1                 Component Inspection
Lubrication Oil pan/Oil strainer/Oil pump/Oil filter/Oil gallery 5 5 5 5 5   5 5     5    

Exploded View

Exploded View

Exploded View

Inspection
Oil level (Low)/Filthy oil Inspection
Variable displacement oil pump 5 5   4             4     DTC Description
Cooling Radiator/Hose/Radiator filler cap 5 5 5 5 5   5 5   4 5    

RADIATOR : Exploded View

Exploded View
Water pump WATER PUMP : Exploded View
Water gallery ENGINE COOLANT : Inspection
Cooling fan 5 ENGINE COOLING FAN : Exploded View
Coolant level (Low)/Contaminated coolant ENGINE COOLANT : Inspection
Multi-way control valve 4

DTC Description

DTC Description

DTC Description

DTC Description

MULTI-WAY CONTROL VALVE : Exploded View
NVIS (NISSAN vehicle Immobilizer System — NATS) 1 1 Work Flow

1 - 6: The numbers refer to the order of inspection.

    Other materials

    Power Seat Switch
    Removal and Installation REMOVALDisengage fixing pawls using a remover tool (A) according to numerical order 1 → 2 indicated by arrows as shown in figure, and then remove sliding switch knob. : Pawl Disengage fixing pawls using a remover tool (A), and then remove reclining switch knob. : Pa ...

    Seat Buzzer
    Removal and Installation REMOVALDisengage seat buzzer harness fixing clip. : Clip Disconnect seat buzzer connector. Remove seat buzzer. INSTALLATIONInstall in the reverse order of removal. ...

    Rear Wiper Blade
    Removal and Installation REMOVALOperate rear wiper to the service position. Refer to System Description. Lift up rear wiper arm, and then lock back rear wiper arm. Remove rear wiper blade from rear wiper arm while rotating rear wiper blade in the direction indicated by the arrows as shown in the f ...