CAR-NAVIGATION UNIT DOES NOT TURN ON [CAR-NAVIGATION SYSTEM (DISPLAY-INTEGRATED TYPE)]

id0903l4103200

Description

Car-navigation unit power is not available

Possible Cause

•  Power supply fuse (+B, ACC) burnt out

•  Open or short circuit in power supply (+B, ACC, GND) wiring harness

•  Car-navigation unit connector poor connection, pin damage

•  Car-navigation unit malfunction

Description	Car-navigation unit power is not available
Possible Cause	• Power supply fuse (+B, ACC) burnt out • Open or short circuit in power supply (+B, ACC, GND) wiring harness • Car-navigation unit connector poor connection, pin damage • Car-navigation unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1

VERIFY IF MALFUNCTION CAUSE IS CONNECTOR CONNECTION CONDITION

•  Remove the car-navigation unit.
(See TBD)

•  Inspect the connection condition of the car-navigation unit connector.

•  Is the car-navigation unit connector connected securely?

Yes

Go to the next step.

No

Connect the car-navigation unit connector securely.

2

VERIFY CONNECTOR CONDITION

•  Disconnect the car-navigation unit connector.

•  Inspect the car-navigation unit connector and vehicle wiring harness connector for pin disconnection or deformity.

•  Are the connectors and pins normal?

Yes

Go to the next step.

No

If there is any malfunction in the car-navigation unit side:

•  Replace the car-navigation unit.

If there is any malfunction in the vehicle wiring harness side:

•  Repair or replace the malfunctioning location.

3

VERIFY IF MALFUNCTION CAUSE IS POWER SUPPLY MALFUNCTION

•  Switch the ignition OFF (LOCK).

•  Inspect the following fuses:

―  AUDIO1 15 A

―  CABIN.+B 50A

―  AUDIO2 7.5 A

•  Is the fuse normal?

Yes

Go to the next step.

No

Replace the fuse with one of the specified value.

If a fuse is burnt out, inspect the vehicle wiring harness for a short circuit. Repair or replace the malfunctioning part, then replace the fuse with one of the specified value.

4

VERIFY IF MALFUNCTION CAUSE IS POWER SUPPLY CIRCUIT

•  Switch the ignition to ACC.

•  Measure the voltage at the following terminals:

―  Terminal 1D (+B) (approx. 12 V)

―  Terminal 1B (ACC) (approx. 12 V)

―  Terminal 1A (ground) (approx. 0 V)

•  Is the voltage normal?

Yes

Replace the car-navigation unit.

(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)

(See CAR-NAVIGATION UNIT DISASSEMBLY/ASSEMBLY.)

No

Repair or replace the malfunctioning vehicle wiring harness.

Step	Inspection		Action
1	VERIFY IF MALFUNCTION CAUSE IS CONNECTOR CONNECTION CONDITION • Remove the car-navigation unit. (See TBD) • Inspect the connection condition of the car-navigation unit connector. • Is the car-navigation unit connector connected securely?	Yes	Go to the next step.
1		No	Connect the car-navigation unit connector securely.
2	VERIFY CONNECTOR CONDITION • Disconnect the car-navigation unit connector. • Inspect the car-navigation unit connector and vehicle wiring harness connector for pin disconnection or deformity. • Are the connectors and pins normal?	Yes	Go to the next step.
2		No	If there is any malfunction in the car-navigation unit side: • Replace the car-navigation unit. If there is any malfunction in the vehicle wiring harness side: • Repair or replace the malfunctioning location.
3	VERIFY IF MALFUNCTION CAUSE IS POWER SUPPLY MALFUNCTION • Switch the ignition OFF (LOCK). • Inspect the following fuses: ― AUDIO1 15 A ― CABIN.+B 50A ― AUDIO2 7.5 A • Is the fuse normal?	Yes	Go to the next step.
3		No	Replace the fuse with one of the specified value. If a fuse is burnt out, inspect the vehicle wiring harness for a short circuit. Repair or replace the malfunctioning part, then replace the fuse with one of the specified value.
4	VERIFY IF MALFUNCTION CAUSE IS POWER SUPPLY CIRCUIT • Switch the ignition to ACC. • Measure the voltage at the following terminals: ― Terminal 1D (+B) (approx. 12 V) ― Terminal 1B (ACC) (approx. 12 V) ― Terminal 1A (ground) (approx. 0 V) • Is the voltage normal?	Yes	Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.) (See CAR-NAVIGATION UNIT DISASSEMBLY/ASSEMBLY.)
4		No	Repair or replace the malfunctioning vehicle wiring harness.