Troubleshooting

Symptom	Suspected area	Repairment
Pressing power switch does not turn on system	Radio receiver power source circuit	R-1
	LCD module	R-1
	Monitor	R-7
	Monitor power	R-9 R-10
Panel switch does not function	Steering pad switch circuit	R-3
	Audio H/U front pcb ass'y	R-1
	Radio receiver power source circuit	R-1
No sound can be heard from speakers	Radio receiver power source circuit	R-1
	EXT. AMP I/F (For PA-760S)	R-4 R-6 R-8
	EXT. AMP power source (For PA-760S)	R-5
	Speaker ↔ H/U wiring	R-11
	Speaker input Waveform	R-12
Noise occurs	Proceed to "noise occurs"	R-14
Radio broadcast cannot be received	Proceed to "radio broadcast cannot be received (poor reception)"	R-13
Disc cannot be inserted or is ejected right after insertion	Radio receiver power source circuit	R-1
	Proceed to "Disc cannot be inserted or is ejected right after insertion"	R-19
Disc cannot be ejected.	Radio receiver power source circuit	R-1
CD sound skips	CD player	R-20
Illumination for radio receiver does not come on whth light control switch on.	Illumination circuit	R-15
	Head unit display	R-15
	Radio receiver power source circuit	R-1
Display does not dim with light control switch turned on	Illumination circuit	R-16
Power does not turn off	Audio H/U	R-1
Bluetooth voice recognition faulty	Audio H/U	R-1
	Mic input	R-17
USB I/F error	Auido H/U	R-1
	Usb device faulty	R-18
	Multimedia terminal connection	R-17
iPod I/F error	Auido H/U	R-1
	Ipod faulty	R-18
	Multimedia terminal connection	R-17
AUX connection error	Auido H/U	R-1
	Multimedia terminal connection	R-17

1.	Check the same problems after replaceing the audio head unit OK ▶ If Audio is normal operating, replace the audio head unit NG ▶ Check the vehicle wiring. (Refer to removal procedure. R-2)

1.	Remove the audio head unit.

2.	Check the specified condition of terminal. OK Tester Connection Condition Specified Condition CON-B11 ↔ GND Always 9~12 V CON-B12 ↔ GND Always 9~12 V CON-B24 ↔ GND Always Below 1Ω NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Check the steering wheel remote control connector specification (Refer to "Audio remote control - inspection") OK ▶ Replace the audio head unit. (Refer to R-1) NG ▶ Replace the steering wheel remote control switch.

1.	Check the same problems after replaceing the external amplifier OK ▶ If Audio is normal operating, replace the external amplifier NG ▶ Check the connectors of external amplifier power and interface (Refer to R-5,R-6 and R-8)

1.	Remove the external amplifier

2.	Check the specified condition of terminal. OK Tester Connection Condition Specified Condition CON-E1 ↔ GND Always 9~12 V CON-E7 ↔ GND Always 9~12 V CON-E15 ↔ GND Always Below 1Ω NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Remove the audio head Unit.

2.	Remove the external amplifier

3.

Check the specified condition of terminal. OK Tester Connection Condition Specified Condition CON-I1 ↔ CON-E5 Always Below 1Ω CON-I1 ↔ GND CON-E5 ↔ GND Always OPEN CON-I13 ↔ CON-E6 Always Below 1Ω CON-I13 ↔ GND CON-E6 ↔ GND Always OPEN NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Remove the audio head unit.

2.	Remove the audio monitor.

3.

Check the specified condition of terminal. OK Tester Connection Condition Specified Condition CON-I1 ↔ CON-C8 Always Below 1Ω CON-I1 ↔ GND CON-C8 ↔ GND Always OPEN CON-I13 ↔ CON-C7 Always Below 1Ω CON-I13 ↔ GND CON-C7 ↔ GND Always OPEN NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Remove the audio head unit.

2.	Remove the external amplifier

3.

Check the specified condition of terminal. OK Tester Connection Condition Specified Condition CON-H6 ↔ CON-E19 Always Below 1Ω CON-H6 ↔ GND CON-E19↔ GND Always OPEN CON-H15 ↔ CON-E18 Always Below 1Ω CON-H15 ↔ GND CON-E18 ↔ GND Always OPEN NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Check the same problems after replaceing the audio head unit OK ▶ If Audio is normal operating, replace the audio head unit NG ▶ Check the vehicle wiring. (Refer to R-10 and R-7)

1.	Remove the audio monitor.

2.	Check the specified condition of terminal. OK Tester Connection Condition Specified Condition CON-C9 ↔ GND Always 9~12 V CON-C10 ↔ GND Always 9~12 V CON-C4 ↔ GND Always OPEN NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Remove the audio head unit

2.

Remove the external amplifier (For PA760s) OK ▶ FOR PA-710S Tester Connection Condition Specified Condition CON-A1 ↔ RL SPK + Always Below 1Ω CON-A10 ↔RL SPK - Always Below 1Ω CON-A2 ↔ FL SPK + Always Below 1Ω CON-A11 ↔ FL SPK - Always Below 1Ω CONA3 ↔ FR SPK + Always Below 1Ω CON-A12 ↔ FR SPK - Always Below 1Ω CON-A4 ↔ RR SPK + Always Below 1Ω CON-A13 ↔ RR SPK - Always Below 1Ω CON-A1, 2, 3, 4, 10, 11, 12, 13 ↔ GND Always OPEN OK ▶ FOR PA-760S Tester Connection Condition Specified Condition CON-E12 ↔ SUB WOOFER2 + Always Below 1Ω CON-E25 ↔ SUB WOOFER2 - Always Below 1Ω CON-E13 ↔ SUB WOOFER1 + Always Below 1Ω CON-E26 ↔ SUB WOOFER1 - Always Below 1Ω CON-F7 ↔ CENTER SPK + Always Below 1Ω CON-F14 ↔ CENTER SPK - Always Below 1Ω CON-G1 ↔ RR DOOR SPK + Always Below 1Ω CON-G7 ↔ RR DOOR SPK - Always Below 1Ω CON-G2 ↔ RL DOOR SPK + Always Below 1Ω CON-G8 ↔ RL DOORSPK - Always Below 1Ω CON-G3 ↔ FR SPK + Always Below 1Ω CON-G9 ↔ FR SPK - Always Below 1Ω CON-G4 ↔ FL SPK + Always Below 1Ω CON-G10 ↔ FL SPK - Always Below 1Ω CON-G5 ↔ FR DOOR SPK + Always Below 1Ω CON-G11 ↔ FR DOOR SPK - Always Below 1Ω CON-G6 ↔ FL DOOR SPK + Always Below 1Ω CON-G12 ↔ FL DOOR SPK - Always Below 1Ω CON-E12, 13, 25, 26/ F7, 14/ G1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ↔ GND Always OPEN NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Remove the audio head unit

2.	Remove the external amplifier (For PA760S)

3.

Check the output of audio head unit and external amplifier using the oscilloscope OK ▶ FOR PA-710S Tester Connection Condition Specified Condition CON-A1 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A10 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A2 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A11 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A3 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A12 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A4 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-A13 ↔ GND Audio sound is being produced A waveform synchronized with sound is output OK ▶ FOR PA-760S Tester Connection Condition Specified Condition CON-E12 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-E25 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-E13 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-E26 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-F7 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-F14 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G1 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G7 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G2 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G8 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G3 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G9 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G4 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G10 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G5 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G11 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G6 ↔ GND Audio sound is being produced A waveform synchronized with sound is output CON-G12 ↔ GND Audio sound is being produced A waveform synchronized with sound is output NG ▶ Check again after repairing or replacing the Cable harness or Connector.

1.	Check the radio broadcast reception after replacing the audio head unit OK ▶ If Audio is normal operating, replace the audio head unit NG ▶ Go to step 2

2.	Check the antenna jack NG ▶ Check again the radio broadcast reception after connecting the antenna jack OK ▶ Go to step 3

3.	Check the antenna amp input voltage (Refer to "Antenna - Glass antenna circuit inspection" NG ▶ Check the antenna amp input voltage (Refer to "Antenna - Antenna cable" OK ▶ Go to step 4

4.	Check the feeder cable connection (Refer to "Antenna - Antenna cable") NG ▶ Check again after repairing or replacing the antenna feeder cable. OK ▶ Go to step 5

5.	Check again the radio broadcast reception after replacing the external amplifier OK ▶ If Audio is normal operating, replace the external amplifier NG ▶ Go to step 6

6.	Check and repair the glass antenna. (Refer to "Antenna - Glass antenna test")

NG	▶ Install the speakers tightly.

OK	▶ Go to step 1

1.

Noise source description Condition in Which Noise Occurs Noise Type Depressing accelerator pedal increases noise, and stopping engine stops noise immediately Generator nosie When A/C or heater is operating Blower motor noise • When rapidly accelerating on unpaved road • When engine switch is turned on (IG) Fuel pump noise • When horn switch is pressed and released • When horn switch is pressed and held down Horn noise Running engine causes soft noise, and stopping engine stops noise immediately Ignition noise Noise occurs synchronously with turn signal flash Flasher noise Noise occurs during window washer operation Washer noise Running engine causes noise, but stopping engine does not stop noise Engine coolant temperature sensor noise When wiper is operating Wiper noise When brake pedal is depressed Stop light switch noise Other Static electricity on vehicle OK ▶ Check the noise source NG ▶ Check again after replacing the audio head unit

2.	Repair or replace the noise source

OK	▶ Remove the audio head unit

NG	▶ Go to step 1

1.

Check the input signal of Illumination (+) FOR PA-710S, 760S Tester Connection Condition Specified Condition CON-A8/H8 ↔ GND Always 9~16 V CON-C4 ↔ GND Always Below 1Ω FOR LCD Tester Connection Condition Specified Condition CON-C5 ↔ GND Always 9~16 V CON-C4 ↔ GND Always Below 1Ω NG ▶ Check the vehicle wiring OK ▶ Go to step 2

2.

Check the illumination (-) input signal using the oscilloscope FOR PA-710S, 760S Tester Connection Condition Specified Condition CON-A17/H17 ↔ GND Always Check the PWM waveform FOR LCD Tester Connection Condition Specified Condition CON-C1 ↔ GND Always Check the PWM waveform NG ▶ Check the vehicle wiring and cluster PWM output. OK ▶ Go to step 3

3.	Check the vehicle illumination control unit.

OK	▶ Replace the audio head unit

NG	▶ Go to step 1

1.

Check the illumination (-) input signal using the oscilloscope FOR PA-710S Tester Connection Condition Specified Condition CON-A17/H17 ↔ GND Always Check the PWM waveform FOR LCD Tester Connection Condition Specified Condition CON-C1 ↔ GND Always Check the PWM waveform Is PWM output waveform changed according to vehicle illumination control ? NG ▶ Check the vehicle wiring and cluster PWM output module. OK ▶ Go to step 2

2.

Check the illumination detent input signal. FOR PA-710S Tester Connection Condition Specified Condition CON-A9 ↔ GND Always LOW : DETENT OFF FOR LCD Tester Connection Condition Specified Condition CON-H9 ↔ GND Always LOW : DETENT OFF NG ▶ Check the vehicle wiring and cluster DETENT output signal OK ▶ Go to step 3

3.	Check the vehicle illumination control unit.

Tester Connection	Condition	Specified Condition
CON-B10/I10 ↔ MIC+	Always	Below 1Ω
CON-B22/I22 ↔ MIC-	Always	Below 1Ω
CON-B22/I22↔ GND	Always	OPEN

NG	▶ Check the vehicle wiring and B/T mic

OK	▶ Go to step 1

1.	Test again after replacing the B/T mic

OK	▶ Replace the audio head unit

NG	▶ Go to step 1

1.	Test after replacing the multimedia jack. OK ▶ Replace the multimedia jack . NG ▶ Go to step 2

2.

Check the multimedia jack connector. Tester Connection Condition Specified Condition CON-B6/I16 ↔ CON-D3 Always Below 1Ω CON-B18/I18 ↔ CON-D2 Always Below 1Ω CON-B7/I7↔ CON-D1 Always Below 1Ω CON-B8/I8↔ COND16 Always Below 1Ω CON-B9/I9↔ CON-D6 Always Below 1Ω CON-B20/I20↔ CON-D14 Always Below 1Ω CON-B21/I21↔ CON-D7 Always Below 1Ω CON-B/I 6, 18, 7, 8, 20, 21 ↔ GND Always OPEN NG ▶ Check the vehicle wiring OK ▶ Go to step 3

3.	Check again after replacing the external input device with another one.

1.	Is the ignition key at ACC or ON? OK ▶ Go to step 2 NG ▶ Turn the key to ON

2.	Power ON reset. Disconnect the 2 audio fuses, wait 5minutes with ignition switch off. And then insert both fuse. Then turn the ignition key ON. Is CD ejected? OK ▶ Loock for foreign matters in CD player. Such as paper lables, coins etc. NG ▶ Go to step 3

3.	If CD does not ejected, don't try removing it. The player may be damaged. Please replace the CD player.

1.	Is CD face scratched or dirty? OK ▶ CD is defective, or clean CD NG ▶ Go to step 2

2.	Does it play properly if CD is replaced with an existing proper CD? OK ▶ Replace CD NG ▶ Repair or replace CD player