Nissan Armada 2025-2026 Service and Repair Manual: 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.
Normal Operating Condition
FUEL CUT CONTROL (AT NO LOAD AND HIGH ENGINE SPEED)
If the engine speed is above 2,500 rpm under no load (for example, the shift position is neutral and engine speed is over 2,500 rpm) fuel will be cu ...
Other materials:
EVAP CANISTER : Leak Check
CAUTION:
Never use compressed air or a high pressure pump.
Never exceed 4.12 kPa (0.042 kg/cm2, 0.6 psi) of pressure in EVAP system.
NOTE:
Never start engine.
Improper installation of EVAP service port adapter to the EVAP service port may cause a leak.
WITH CONSULT
To locate the EVAP leak, install ...
Main Bearing
MAIN BEARING
Unit: mm (in)
Grade number Thickness Width Identification color Remarks 0 2.500 - 2.503 (0.0984 - 0.0985) 19.9 - 20.1
(0.783 - 0.791) Black - Black Grade is the same for upper and lower bearings. 1 2.503 - 2.506 (0.0985 - 0.0987) Brown - Brown 2 2.506 - 2.509 (0.0987 - 0. ...
Front, front central seat-mounted side-impact supplemental air bag and roof-mounted
curtain side-impact and rollover supplemental air bag systems
*: if so equipped
In the Nissan Armada, the supplemental side-impact and curtain air bag systems
are engineered to provide enhanced protection for occupants during side collisions
and rollover events. These systems work together with seat belts to form a comprehensive
safety network.
The ...
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