Inspection Procedure 7
INSPECTION PROCEDURE 7: No Sound from One SpeakerSpeaker System Circuit Vehicle With Audio Amplifier Part 1:
Speaker System Circuit Vehicle With Audio Amplifier Part 2:
CIRCUIT OPERATION
The sound signals are sent from the audio amplifier After the signals are amplified and filtered, the sound signals are sent to the speaker
TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a faulty speaker circuit system
TROUBLESHOOTING HINTS
- Malfunction of the speaker
- Damaged wiring harness or connector
- Malfunction of the audio amplifier
DIAGNOSIS
STEP 1 Check which speaker has no sound on the vehicles with audio amplifier.
Determine which speaker does not sound
Q: Which speaker does not sound?
Tweeter (LH) : Go to Step 2
Tweeter (RH) : Go to Step 5
Front door speaker (LH) : Go to Step 8
Front door speaker (RH) : Go to Step 11
Rear speaker (LH) : Go to Step 14
Rear speaker (RH) : Go to Step 17
STEP 2 Check the tweeter (LH)
1. Remove the tweeter (LH)
2. Check that the tweeter (LH) generates noise when a five-volt voltage is applied on the tweeter (LH) terminal
Q: Is the tweeter (LH) generating noise?
YES: Go to Step 3
NO: Replace the tweeter (LH) The tweeter (LH) should sound
STEP 3 Check tweeter (LH) connector C-130 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Are harness connectors C-130 and C-113 in good condition?
YES: Go to Step 4
NO: Repair or replace the component(s) Refer to Harness Connector Inspection The tweeter (LH) should sound
STEP 4 Check the wiring harness between tweeter (LH) connector C-130 (terminals 2 and 1) and audio amplifier connector C-113 (terminals 3 and 11)
Q: Is the wiring harness between tweeter (LH) connector C-130 (terminals 2 and 1) and audio amplifier connector C-113 (terminals 3 and 11) in good condition?
YES: Replace the audio amplifier The tweeter (LH) should sound
NO: Repair the wiring harness The tweeter (LH) should sound
STEP 5 Check the tweeter (RH)
1. Remove the tweeter (RH)
2. Check that the tweeter (RH) generates noise when a five-volt voltage is applied on the tweeter (RH) terminal
Q: Is the tweeter (RH) generating noise?
YES: Go to Step 6
NO: Replace the tweeter (RH) The tweeter (RH) should sound
STEP 6 Check tweeter (RH) connector C-108 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Are harness connectors C-108 and C-113 in good condition?
YES: Go to Step 7
NO: Repair or replace the component(s) Refer to Harness Connector Inspection The tweeter (RH) should sound
STEP 7 Check the wiring harness between tweeter (RH) connector C-108 (terminals 2 and 1) and audio amplifier connector C-113 (terminals 4 and 12)
Q: Is the wiring harness between tweeter (RH) connector C-108 (terminals 2 and 1) and audio amplifier connector C-113 (terminals 4 and 12) in good condition?
YES: Replace the audio amplifier The tweeter (RH) should sound
NO: Repair the wiring harness The tweeter (RH) should sound
STEP 8 Check the front door speaker (LH)
1. Remove the front door speaker (LH)
2. Check that the front door speaker (LH) generates noise when a five-volt voltage is applied on the front door speaker (LH) terminal
Q: Is the front door speaker (LH) generating noise?
YES: Go to Step 9
NO: Replace the front door speaker (LH) The front door speaker (LH) should sound
STEP 9 Check front door speaker (LH) connector E-10 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Are harness connectors E-10 and C-113 in good condition?
YES: Go to Step 10
NO: Repair or replace the component(s) Refer to Harness Connector Inspection The front door speaker (LH) should sound
STEP 10 Check the wiring harness between front door speaker (LH) connector E-10 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 13 and 14)
NOTE: Also check intermediate connector C-26 for loose, corroded, or damaged terminals, or terminals pushed back in the connector If intermediate connector C-26 is damaged, repair or replace the connector as described in Harness Connector Inspection
Q: Is the wiring harness between front door speaker (LH) connector E-10 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 13 and 14) in good condition?
YES: Replace the audio amplifier The front door speaker (LH) should sound
NO: Repair the wiring harness The front door speaker (LH) should sound
STEP 11 Check the front door speaker (RH)
1. Remove the front door speaker (RH)
2. Check that the front door speaker (RH) generates noise when a five-volt voltage is applied on the front door speaker (RH) terminal
Q: Is the front door speaker (RH) generating noise?
YES: Go to Step 12
NO: Replace the front door speaker (RH) The front door speaker (RH) should sound
STEP 12 Check front door speaker (RH) connector E-02 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Are harness connectors E-02 and C-113 in good condition?
YES: Go to Step 13
NO: Repair or replace the component(s) Refer to Harness Connector Inspection The front door speaker (RH) should sound
STEP 13 Check the wiring harness between front door speaker (RH) connector E-02 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 15 and 5)
NOTE: Also check intermediate connector C-12 for loose, corroded, or damaged terminals, or terminals pushed back in the connector If intermediate connector C-12 is damaged, repair or replace the connector as described in Harness Connector Inspection
Q: Is the wiring harness between front door speaker (RH) connector E-02 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 15 and 5) in good condition?
YES: Replace the audio amplifier The front door speaker (RH) should sound
NO: Repair the wiring harness The front door speaker (RH) should sound
STEP 14 Check the rear speaker (LH)
1. Remove the rear speaker (LH)
2. Check that the rear speaker (LH) generates noise when a five-volt voltage is applied on the rear speaker (LH) terminal
Q: Is the rear speaker (LH) generating noise?
YES: Go to Step 15
NO: Replace the rear speaker (LH) The rear speaker (LH) should sound
STEP 15 Check rear speaker (LH) connector D-12 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Are harness connectors D-12 and C-113 in good condition?
YES: Go to Step 16
NO: Repair or replace the damaged component(s) Refer to Harness Connector Inspection The rear speaker (LH) should sound
STEP 16 Check the wiring harness between rear speaker (LH) connector D-12 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 2 and 10)
NOTE: Also check intermediate connector C-28 for loose, corroded, or damaged terminals, or terminals pushed back in the connector If intermediate connector C-28 is damaged, repair or replace the connectors as described in Harness Connector Inspection
Q: Is the wiring harness between the rear speaker (LH) connector D-12 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 2 and 10) in good condition?
YES: Replace the audio amplifier The rear speaker (LH) should sound
NO: Repair the wiring harness The rear speaker (LH) should sound
STEP 17 Check the rear speaker (RH)
1. Remove the rear speaker (RH)
2. Check that the rear speaker (RH) generates noise when a five-volt voltage is applied on the rear speaker (RH) terminal
Q: Is the rear speaker (RH) generating noise?
YES: Go to Step 18
NO: Replace the rear speaker (RH) The rear speaker (RH) should sound
STEP 18 Check rear speaker (RH) connector D-09 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector
Q: Are harness connectors D-09 and C-113 in good condition?
YES: Go to Step 19
NO: Repair or replace the component(s) Refer to Harness Connector Inspection The rear speaker (RH) should sound
STEP 19 Check the wiring harness between rear speaker (RH) connector D-09 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 9 and 1)
NOTE: Also check intermediate connector C-13 for loose, corroded, or damaged terminals, or terminals pushed back in the connector If intermediate connector C-13 is damaged, repair or replace the connectors as described in Harness Connector Inspection
Q: Is the wiring harness between rear speaker (RH) connector D-09 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 9 and 1) in good condition?
YES: Replace the audio amplifier The rear speaker (RH) should sound
NO: Repair the wiring harness The rear speaker (RH) should sound