Diagnosis Procedure 2

NATS (NISSAN ANTI-THEFT SYSTEM)


Diagnosis Procedure 2

Self-diagnostic results:
"CHAIN OF IMMU-KEY" displayed on CONSULT-III screen
1.CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS "CHAIN OF IMMU-KEY" displayed on CONSULT-III screen.
Is "CHAIN OF IMMU-KEY" displayed?
Yes - GO TO 2
No - GO TO Trouble Diagnosis .
2.CHECK NATS ANTENNA AMP. INSTALLATION
Check NATS antenna amp. installation. Service and Repair .
OK or NG
OK - GO TO 3
NG - Reinstall NATS antenna amp. correctly.
3.CHECK NATS IGNITION KEY ID CHIP
Start engine with another registered NATS ignition key.
Does the engine start?
Yes - Ignition key ID chip is malfunctioning.
- Replace the ignition key
- Perform initialization with CONSULT-III
For initialization, refer to "CONSULT-III Operation Manual NATS"
No - GO TO 4
4.CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
1. Turn ignition switch "OFF".
2. Check voltage between NATS antenna amp. connector and ground.










OK or NG
OK - GO TO 5
NG - Check the following.
- 20A fuse [No. 53, located in IPDM E/R]
- Harness for open or short between fuse and NATS antenna amp.
5.CHECK NATS ANTENNA AMP. SIGNAL LINE- 1
Check voltage between NATS antenna amp. connector and ground with analog tester.










OK or NG
OK - GO TO 6
NG -
- Check harness for open or short between NATS antenna amp. and BCM.

NOTE:
If harness is OK, replace BCM, perform initialization with CONSULT-III. For initialization, refer to "CONSULT-III Operation Manual NATS".
6.CHECK NATS ANTENNA AMP. SIGNAL LINE- 2
Check voltage between NATS antenna amp. connector and ground with analog tester.










OK or NG
OK - GO TO 7
NG -
- Check harness for open or short between NATS antenna amp. and BCM.

NOTE:
If harness is OK, replace BCM, perform initialization with CONSULT-III. For initialization, refer to "CONSULT-III Operation Manual.
7.CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect NATS antenna amp. connector.
3. Check continuity between NATS antenna amp. connector and ground.










OK or NG
OK - NATS antenna amp. is malfunctioning, reinstall antenna or replace it.
NG - Repair or replace NATS antenna amp. ground circuit.