Checking the Loudspeakers and Loudspeaker Wiring
Checking the loudspeakers and loudspeaker wiring
Fault-tracing information
Hint: Check that the volume is not turned down. Turn the VOLUME knob on the infotainment control module (ICM). Also check that the balance is set evenly between all the speakers using the SELECTOR knob.
The loudspeakers may stop playing back sound from a particular sound source, for example the MD and CD players or the radio.
Causes of the problem may be:
- Open-circuit in the signal cable between the audio module (AUM)/(AUD) and the loudspeakers
- defective loudspeakers
- Oxidation in the terminal pins in the connectors
- Problems on the MOST network
- Defective control module.
Hint: If there is no sound from any of the loudspeakers, check that the 16-pin connector on the audio module (AUD) is correctly connected. If there is still no sound from the loudspeakers, the problem is not in the loudspeaker wiring.
Select an option:
1. loudspeakers front/center
2. loudspeakers rear.
Which loudspeakers are not working?
1 - front/center loudspeakers
2 - rear doors
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Checking the loudspeaker wiring, rear doors
- Ignition off
- Disconnect the 16-pin connector for the audio module (AUD)
- Disconnect the connectors for the rear loudspeakers.
Hint: There may be two loudspeakers connected to these signal cables, one for the treble loudspeaker in the D-post and one for the loudspeaker in the rear door. For further information, see the wiring diagram.
Checking the cable
Check the cable terminals on the loudspeaker cable. Check for contact resistance, loose connections and oxidation. Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back.
Checking the cable for the loudspeaker, left rear door
Check the cable between audio module (AUD) terminal #B12 and loudspeaker terminal #1 in the left rear door. Check for an open-circuit.
Check the cable between audio module (AUD) terminal #B4 and loudspeaker terminal #2 in the left rear door. Check for an open-circuit.
Check the resistance between terminals #B4 and #B12 in the connector for the audio module (AUD). The resistance must be infinite.
Checking the cable for the loudspeaker, right rear door
Check the cable between audio module (AUD) terminal #B13 and loudspeaker terminal #1 in the right rear door. Check for an open-circuit.
Check the cable between audio module (AUD) terminal #B5 and loudspeaker terminal #2 in the right rear door. Check for an open-circuit.
Check the resistance between terminals #B5 and #B13 in the connector for the audio module (AUD). The resistance must be infinite.
Remedy as necessary
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Audio Module (AUD)
- To access or replace the audio module (AUD), see Audio module (AUD), replacing Audio Module (AUD), Replacing
- To access or replace the loudspeaker in the D-post, see Loudspeaker, D-post, replacing Loudspeaker, D-Post, Replacing
- To access or replace the loudspeaker in the rear side door, see Loudspeaker, rear side door, replacing Loudspeaker, Rear Side Door, Replacing
- For information about signals, see Signal specification Signal Specification, Audio Module (AUM)
- Checking wiring and terminals Checking Wiring and Terminals.
Select Continue
Continue - rear door
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Checking the loudspeakers, rear door
- Ignition off
- Disconnect the 16-pin connector for the audio module (AUD)
- Disconnect the connectors for the rear loudspeakers.
Hint: There may be two loudspeakers connected to the same signal cable, one for the treble loudspeaker in the D-post and one for the loudspeaker in the rear door. For further information, see the wiring diagram.
Note! Take readings for the treble loudspeaker in the D-post on the two signal cables which are directly connected to the cone transducer. See the illustration. Take readings between points 1 and 2.
Checking the cable
Check the cable terminals on the loudspeaker cable. Check for contact resistance, loose connections and oxidation. Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back
Checking the loudspeaker, left rear door
Check the resistance between loudspeaker terminals #1 and #2. The resistance must be approximately 2-8 ohms.
Checking the loudspeaker, left-hand D-post
Check the resistance of the treble loudspeaker in the left-hand D-post. See the illustration. Take readings between points 1 and 2. The resistance must be approximately 6-8 ohms.
Checking the loudspeaker, right rear door
Check the resistance between loudspeaker terminals #1 and #2. The resistance must be approximately 2-8 ohms.
Checking the loudspeaker, right-hand D-post
Check the resistance of the treble loudspeaker in the right-hand D-post. See the illustration. Take readings between points 1 and 2. The resistance must be approximately 6-8 ohms.
Remedy as necessary
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Audio Module (AUD)
- To access or replace the audio module (AUD), see Audio module (AUD), replacing Audio Module (AUD), Replacing
- To access or replace the loudspeaker in the D-post, see Loudspeaker, D-post, replacing Loudspeaker, D-Post, Replacing
- To access or replace the loudspeaker in the rear side door, see Loudspeaker, rear side door, replacing Loudspeaker, Rear Side Door, Replacing
- For information about signals, see Signal specification Signal Specification, Audio Module (AUM)
- Checking wiring and terminals Checking Wiring and Terminals.
Was a fault detected?
Yes - Verification
No - No Fault Found
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Checking the cable, front/center loudspeakers
- Ignition off
- Disconnect the 16-pin connector for the audio module (AUD)
- Disconnect the connectors for the front loudspeakers
- Disconnect the connector for the center loudspeaker if it is connected.
Note! Only some audio modules have a center loudspeaker connected. If the center loudspeaker is not connected do not perform fault-tracing for the center loudspeaker.
Hint: There may be two loudspeakers connected to the same signal cable, one for the treble loudspeaker/upper loudspeaker in the front door and one for the loudspeaker in the front door. For further information, see the wiring diagram.
Checking the cable
Check the cable terminals on the loudspeaker cable. Check for contact resistance, loose connections and oxidation. Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back.
Checking the cable for the loudspeaker, left front door
Check the cable between audio module (AUD) terminal #B9 and loudspeaker terminal #1 in the left front door. Check for an open-circuit.
Check the cable between audio module (AUD) terminal #B1 and loudspeaker terminal #2 in the left front door. Check for an open-circuit.
Check the resistance between terminals #B1 and #B9 in the connector for the audio module (AUD). The resistance must be infinite.
Checking the cable for the loudspeaker, right front door
Check the cable between audio module (AUD) terminal #B3 and loudspeaker terminal #2 in the right front door. Check for an open-circuit.
Check the cable between audio module (AUD) terminal #B11 and loudspeaker terminal #1 in the right front door. Check for an open-circuit.
Check the resistance between terminals #B3 and #B11 in the connector for the audio module (AUD). The resistance must be infinite.
Checking the cable for the center loudspeaker
Check the cable between audio module (AUD) terminal #B2 and center speaker terminal #2 on the dashboard. Check for an open-circuit.
Check the cable between audio module (AUD) terminal #B10 and center speaker terminal #1 on the dashboard. Check for an open-circuit.
Check the resistance between terminals #B2 and #B10 in the connector for the audio module (AUD). The resistance must be infinite.
Remedy as necessary
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Audio Module (AUD)
- To access or replace the audio module (AUD), see Audio module (AUD), replacing Audio Module (AUD), Replacing
- To access or replace the loudspeaker in the front side door, see Loudspeaker, front side door, replacing Loudspeaker, Front Side Door, Replacing
- To access or replace the center loudspeaker, see Central loudspeaker, replacing Central Loudspeaker, Replacing
- For information about signals, see Signal specification Signal Specification, Audio Module (AUM)
- Checking wiring and terminals Checking Wiring and Terminals.
Select Continue
Continue - front/center loudspeakers
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Checking the cable, front/center loudspeakers
- Ignition off
- Disconnect the 16-pin connector for the audio module (AUD)
- Disconnect the connector for the center loudspeaker.
Note! Take readings for the treble loudspeaker in the center loudspeaker bracket on the two signal cables which are directly connected to the treble cone transducer. See the illustration. Take readings between points 1 and 2.
Checking the cable
Check the cable terminals on the loudspeaker cable. Check for contact resistance, loose connections and oxidation. Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back.
Checking the center speaker
Check the resistance between terminals #1 and #2 on the center speaker. The resistance must be approximately 5-8 ohms.
Check the resistance in the treble transducer for the center speaker. See the illustration. Take readings between points 1 and 2. The resistance must be approximately 6-8 ohms
Remedy as necessary
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Audio Module (AUD)
- To access or replace the audio module (AUD), see Audio module (AUD), replacing Audio Module (AUD), Replacing
- To access or replace the center loudspeaker, see Central loudspeaker, replacing Central Loudspeaker, Replacing
- For information about signals, see Signal specification Signal Specification, Audio Module (AUM)
- Checking wiring and terminals Checking Wiring and Terminals.
Continue - front/center loudspeakers
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition on
- Switch on the radio or CD/MD player.
Raise and lower the volume using the VOLUME knob. Check that the sound increases and decreases in the loudspeakers at the same time.
Is there sound?
Yes - Troubleshooting procedure complete
No - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit Fault-tracing
No - Attempt New Test
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Attempt New Test - Fault-tracing information
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Checking the cable, front/center loudspeakers
- Ignition off
- Disconnect the 16-pin connector for the audio module (AUD)
- Disconnect the connectors for the front loudspeakers.
Hint: There may be two loudspeakers connected to the same signal cable, one for the treble loudspeaker/upper loudspeaker and one for the loudspeaker in the front door. For further information, see the wiring diagram.
Caution! Check the treble loudspeaker/upper loudspeaker visually only. Check for oxidation and loose connections. Do not perform any electrical fault-tracing on the treble loudspeaker.
Note! Certain loudspeakers may have two separate cone transducers. For these loudspeakers, follow the fault-tracing for both loudspeakers and cone transducers in the left and right front doors. For other loudspeakers, only perform the fault-tracing for the loudspeakers in the left and right-hand front doors.
Checking the cable
Check the cable terminals on the loudspeaker cable. Check for contact resistance, loose connections and oxidation. Check the cable terminals in the female and male sections of the connector. The cable terminals must not be damaged or pressed back.
Checking the loudspeaker, left front door
Check the resistance between loudspeaker terminals #1 and #2 in the left front door. The resistance must be approximately 2-4 ohms.
Checking the upper cone transducer, left front door
Check the resistance between the terminals for the upper cone transducer in the left-hand front door. See the illustration. Take readings between points 1 and 2. The resistance must be approximately 3-5 ohms.
Checking the loudspeaker, right front door
Check the resistance between loudspeaker terminals #1 and #2 in the right front door. The resistance must be 2-4 ohms.
Checking the upper cone transducer, right front door
Check the resistance between the terminals for the upper cone transducer in the right-hand front door. See the illustration. Take readings between points 1 and 2. The resistance must be approximately 3-5 ohms.
Remedy as necessary
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Audio Module (AUD)
- To access or replace the audio module (AUD), see Audio module (AUD), replacing Audio Module (AUD), Replacing
- To access or replace the loudspeaker in the front side door, see Loudspeaker, front side door, replacing Loudspeaker, Front Side Door, Replacing
- For information about signals, see Signal specification Signal Specification, Audio Module (AUM)
- Checking wiring and terminals Checking Wiring and Terminals.
Was a fault detected?
No - No Fault Found
Yes - FAULT FOUND
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