Diagnosis Procedure
WARNING: This page is about a different car, the 2015 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to WIRING DIAGRAM .
- CHECK KEY SWITCH
With CONSULT
Check key switch ("KEY SW") in "DATA MONITOR" mode with CONSULT.
Monitor item Condition KEY SW Insert mechanical key into ignition switch: ON Remove mechanical key from ignition switch: OFF Without CONSULT
- Turn ignition switch OFF.
- Disconnect Intelligent Key unit harness connector.
- Check voltage between Intelligent Key unit harness connector M70 terminal 7 and ground.
Courtesy of NISSAN NORTH AMERICA, INC.
Connector Terminals Condition Voltage (V)
(Approx.)(+) (-) M70 7 Ground Insert mechanical key into ignition switch Battery voltage Remove mechanical key from ignition switch 0
Is the inspection result normal?
YES
Key switch is OK.
NO
GO TO STEP 2
- CHECK KEY SWITCH POWER SUPPLY CIRCUIT
- Remove mechanical key from ignition switch.
- Disconnect key switch and ignition knob switch connector.
- Check voltage between key switch and ignition knob switch harness connector M12 terminal 3 and ground.Fig 2: Checking Voltage Between Key Switch And Ignition Knob Switch Connector M12 Terminal 3 And Ground
Courtesy of NISSAN NORTH AMERICA, INC.
3 - Ground Battery voltage
Is the inspection result normal?
YES
GO TO STEP 3
NO
Repair or replace key switch and ignition knob switch power supply circuit.
- CHECK KEY SWITCH OPERATION
Check continuity between key switch and ignition knob switch terminals 3 and 4.
Courtesy of NISSAN NORTH AMERICA, INC.
Component Terminals Condition Continuity Key switch 3 4 Insert mechanical key into ignition switch. Yes Remove mechanical key from ignition switch. No Is the inspection result normal?
YES
GO TO STEP 4
NO
Replace key cylinder assembly (built-in key switch).
- CHECK KEY SWITCH CIRCUIT
- Check continuity between Intelligent Key unit harness connector (A) M70 terminal 7 and key switch and ignition knob switch harness connector (B) M12 terminal 4.Fig 4: Checking Continuity Between Intelligent Key Unit Connector M70 Terminal 7 And Key Switch And Ignition Knob Switch Connector M12 Terminal 4
Courtesy of NISSAN NORTH AMERICA, INC.
7 - 4 Continuity should exist. - Check continuity between Intelligent Key unit harness connector (A) M70 terminal 7 and ground.
7 - Ground Continuity should not exist.
Is the inspection result normal?
YES
Check the condition of harness and harness connector.
NO
Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.
- Check continuity between Intelligent Key unit harness connector (A) M70 terminal 7 and key switch and ignition knob switch harness connector (B) M12 terminal 4.