Diagnostic Procedure

STEP	INSPECTION		ACTION
1	Switch the ignition to ACC or ON. Turn the audio unit power to ON. While pressing the POWER/VOLUME switch, simultaneously press the AUTO-M button for 0.5 s or more . Is there any speaker with no sound?	Yes	If no sound from some speakers: Go to the next step. If no sound at all: Go to the troubleshooting of "No.3 No sound from all speakers".
1		No	The troubleshooting is completed.
2	Switch the ignition OFF (LOCK). Inspect the connection of the audio unit connector (24-pin). (for sound signal line) Is the connector connected securely?	Yes	Go to the next step.
2		No	Connect the audio unit connector (24-pin) securely.
3	Switch the ignition OFF (LOCK). Remove the audio unit. Disconnect the audio unit connector (24-pin). Inspect the continuity between the audio unit wiring harness-side connector terminal and ground: For front door speaker/tweeter Terminal 1A (LH+)-GND Terminal 1C (LH-)-GND Terminal 1D (RH+)-GND Terminal 1F (RH-)-GND For rear speaker Terminal 1S (LH+)-GND Terminal 1U (LH-)-GND Terminal 1V (RH+)-GND Terminal 1X (RH-)-GND Is there continuity?	Yes	Repair or replace the suspect wiring harness or speaker unit.
3		No	Go to the next step. NOTE: If there is a short circuit between the speaker harness or speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
4	Disconnect the speaker connector (2-pin) and inspect the resistance of speaker. Inspect the continuity between the audio unit wiring harness-side connector terminal and speaker wiring harness-side connector: Audio unit-front door speaker Terminal 1A (LH+)-terminal B Terminal 1C (LH-)-terminal A Terminal 1D (RH+)-terminal B Terminal 1F (RH-)-terminal A Audio unit-rear speaker Terminal 1S (LH+)-terminal B Terminal 1U (LH-)- terminal A Terminal 1V (RH+)-terminal B Terminal 1X (RH-)-terminal A Audio unit-tweeter Terminal 1A (LH+)-terminal B Terminal 1C (LH-)-terminal A Terminal 1D (RH+)-terminal B Terminal 1F (RH-)-terminal A Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the suspect wiring harness or speaker unit.
5	Inspect the suspect speaker. Is the speaker normal? NOTE: If the speaker lead wire contacts to either ground or vehicle frame, replace the speaker.	Yes	Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION .)
5		No	Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION .) (See REAR SPEAKER REMOVAL/INSTALLATION .) (See TWEETER REMOVAL/INSTALLATION .)