Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check that the following fuse is not fusing.

   Power source	Fuse No.	Capacity
   Battery	#7	15 A
   Ignition switch ACC	#1	10 A
   Ignition switch ON	#12	10 A

Is the fuse fusing?

YES 

Replace fuse after repairing the applicable circuit.

NO 

GO TO STEP 2  .

1. Turn ignition switch OFF.
2. Disconnect NAVI control unit harness connector.
3. Check the voltage between NAVI control unit harness connector and ground.

   Terminals			Voltage
   (+)		(-)
   NAVI control unit
   Connector	Terminal
   M60	1	Ground	Battery voltage
   	15

Is the inspection result normal?

YES 

GO TO STEP 3  .

NO 

Perform trouble diagnosis for battery power supply circuit.

1. Turn ignition switch ON.
2. Check the voltage between NAVI control unit harness connector and ground.

   Terminals			Voltage
   (+)		(-)
   NAVI control unit
   Connector	Terminal
   M60	5	Ground	Battery voltage

Is the inspection result normal?

YES 

GO TO STEP 4  .

NO 

Perform trouble diagnosis for accessory power supply circuit.

Check the voltage between NAVI control unit harness connector and ground.

Is the inspection result normal?

YES 

GO TO STEP 5  .

NO 

Perform trouble diagnosis of ignition power supply circuit.

1. Turn ignition switch OFF.
2. Check the continuity between NAVI control unit and ground.

   Terminals			Continuity
   (+)		(-)
   NAVI control unit
   Connector	Terminal
   M60	3	Ground	Existed
   	17

Is the inspection result normal?

YES 

INSPECTION END

NO 

Repair or replace malfunctioning parts.