NO.2 SYSTEM DOES NOT CONTROL AUDIO BY AUDIO CONTROL SWITCH. [CAR-NAVIGATION SYSTEM]

id0903e8910300

2

System does not control audio by audio control switch.

POSSIBLE CAUSE

•  Car-navigation unit malfunction

•  Poor connection of car-navigation unit connector, terminal damage

•  Audio control switch malfunction.

•  Open or short circuit in wiring harness between audio control switch and car-navigation unit.

2	System does not control audio by audio control switch.
POSSIBLE CAUSE	• Car-navigation unit malfunction • Poor connection of car-navigation unit connector, terminal damage • Audio control switch malfunction. • Open or short circuit in wiring harness between audio control switch and car-navigation unit.

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Turn the ignition switch to ACC position. • Start audio system by pressing the audio system button (AM/FM, DISC), after the map is displayed on the screen. • Control the audio using the audio control switch. • Is the audio system controlled normally?	Yes	The system is normal.
1		No	Go to the next step.
2	• Inspect the connection of the car-navigation unit connectors (24-pin). • Is the car-navigation unit connector connected securely?	Yes	Go to the next step.
2		No	Securely connect the car-navigation unit connector.
3	• Disconnect the car-navigation unit connector (24-pin). • Inspect both car-navigation unit connector and wiring harness-side connector terminals 1N and 1P for poor connection (such as damaged/pulled-out pins, corrosion). • Are all the pins normal?	Yes	Go to the next step.
3		No	If the car-navigation unit connector is wrong: • Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.) If the wiring harness-side connector is wrong: • Repair or replace the pins and/or the connector.
4	• Disconnect the car-navigation unit connector (24-pin). • Measure the resistance between terminal 1N and 1P at car-navigation unit harness-side connector (24-pin) while the audio control switch (Vol-, Vol+, SEEK-, SEEK+, Mode, Voice) is pressed. • Is the resistance within the specified? Specification 50 ohms — 5 kilo-ohms (Resistance is changing according to audio switch pressed position.)	Yes	Go to the next step.
4		No	Inspect and repair the following: • Audio control switch. (See AUDIO CONTROL SWITCH INSPECTION.) • Wiring harness between car-navigation unit and audio control switch for open or short circuit).
5	• Verify that the continuity between terminal 1N and 1P at car-navigation unit harness-side connector (24-pin) while the audio control switch is pressed. • Is there continuity?	Yes	Troubleshooting completed. (The system is normal.)
5		No	Inspect and repair the following: • Audio control switch. (See AUDIO CONTROL SWITCH INSPECTION.) • Wiring harness between car-navigation unit and audio control switch for open or short circuit).