Diagnostic Procedure 1

Check voltage between NATS IMMU connector M32 terminal 2 (PU/W) and ground.

Fig 1: Checking Voltage Between NATS IMMU Connector M32 Terminal 2 (PU/W) And Ground

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Fig 2: Identifying NATS IMMU Connector M32 Terminal 2 (Pu/W) And Ground Table

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OK or NG 

OK >> Replace NATS IMMU.

NG >> GO TO 2.

1. Remove the key from the ignition key cylinder.
2. Disconnect NATS IMMU and key switch and key lock solenoid (key switch) connector.
3. Check continuity between NATS IMMU connector M32 terminal 2 (PU/W) and key switch and key lock solenoid (key switch) connector M64 terminal 4 (PU/W).
   1. Continuity should exist. 
   Fig 3: Check Continuity Between NATS IMMU Connector And Key Switch

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OK or NG 

OK >> GO TO 3.

NG >> Repair or replace harness.

Check continuity key switch terminals.

Fig 4: Checking Continuity Key Switch Terminals

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Fig 5: Identifying Continuity Key Switch Terminals Table

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OK or NG 

OK >> Check the following.

• 10A fuse [No. 32, located in fuse block (J/B) No. 2]
• Harness for open or short between key switch and fuse

NG >> Replace key switch.