Description
ECM has the memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the Idle Air Volume Learning value memory, etc. even when the ignition switch is turned OFF.
DTC DETECTION LOGIC
DTC No. | Trouble diagnosis | DTC detecting condition | Possible cause |
P0603 |
ECM BACK UP/CIRCUIT (ECM power supply circuit) | ECM back-up RAM system does not function properly. |
|
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected?
YES >> Go to EC, "Diagnosis Procedure".
NO >> INSPECTION END
1.INSPECTION START
Is the 1st trip DTC P0603 displayed again?
YES >> GO TO 2.
NO >> INSPECTION END
2.REPLACE ECM
>> INSPECTION END
CVT Control system
Symptom Table
The diagnosis item number indicates the order of check. Start checking in the
order from 1.
Symptom diagnosis chart 1-1
Symptom diagnosis chart 1-2
Symptom diagnosis chart 2-1
Symptom diagnosis chart 2-2
PERIODIC MAINTENANCE ...
Nissan anti-theft system
NISSAN ANTI-THEFT SYSTEM : System Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
The Nissan Anti-Theft System (NATS) prevents the engine from being
started by Intelligent Key whose ID is
not registered to the vehicle (BCM). It has higher protection against auto
theft involving the d ...