|
1
|
VERIFY MALFUNCTION SYMPTOM
• Switch the ignition to ACC or ON (engine off or on).
• Launch the on-board diagnostic assist function.
• Select assist code “94”.
• Press the [ENTER] and verify that the sound is output from each speaker.
• Is sound output from each speaker in the order?
|
Yes
|
• System is normal.
• Due to the possibility that sound is not output in some modes, verify the malfunction in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis.
|
|
No
|
• No sound is produced from all speakers
-
― Go to the next step.
• No sound is produced from some speakers
-
― Go to Step 8.
|
|
2
|
INSPECT TAU CONNECTOR
• Switch the ignition off.
• Disconnect the negative battery cable.
• Disconnect the TAU connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is the connector normal?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the connector, then go to Step 10.
|
|
3
|
INSPECT CMU CONNECTOR
• Disconnect the CMU connector.
• Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
• Is the connector normal?
|
Yes
|
Without i-ELOOP
• Go to the next step.
With i-ELOOP
• Go to Step 5.
|
|
No
|
Repair or replace the connector, then go to Step 10.
|
|
4
|
INSPECT TAU ACC POWER SUPPLY VOLTAGE
• Verify that the TAU connector is disconnected.
• Reconnect the negative battery cable.
• Switch the ignition to ACC or ON (engine off or on).
• Measure the voltage at TAU terminal 2R (vehicle wiring harness side).
• Is the voltage B+?
|
Yes
|
Go to Step 6.
|
|
No
|
Inspect the RADIO 7.5A fuse.
• If the fuse is blown:
-
― Refer to the wiring diagram and verify if there is a common connector between RADIO 7.5A fuse and the TAU terminal 2R.
If there is a common connector:
-
• Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
• Repair or replace the malfunctioning location.
If there is no common connector:
-
• Repair or replace the wiring harness which is shorted to ground.
• Replace the fuse.
• If the fuse is damaged:
-
― Replace the fuse.
• If the fuse is normal:
-
― Refer to the wiring diagram and verify if there is a common connector between DC-DC converter terminal K and TAU terminal 2R.
If there is a common connector:
-
• Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
• Repair or replace the malfunctioning location.
If there is no common connector:
-
• Repair or replace the wiring harness which has an open circuit.
Go to Step 10.
|
|
5
|
INSPECT TAU ACC POWER SUPPLY VOLTAGE
• Verify that the TAU connector is disconnected.
• Reconnect the negative battery cable.
• Switch the ignition to ACC or ON (engine off or on).
• Measure the voltage at TAU terminal 2R (vehicle wiring harness side).
• Is the voltage B+?
|
Yes
|
Go to Step 6.
|
|
No
|
Inspect the RADIO 7.5A fuse and IG2 30A fuse.
• If the fuse is blown:
-
― Refer to the wiring diagram and verify if there is a common connector between IG2 30A fuse and the TAU terminal 2R.
If there is a common connector:
-
• Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
• Repair or replace the malfunctioning location.
If there is no common connector:
-
• Repair or replace the wiring harness which is shorted to ground.
• Replace the fuse.
• If the fuse is damaged:
-
― Replace the fuse.
• If the fuse is normal:
-
― Refer to the wiring diagram and verify if there is a common connector between the following terminals.
-
• DC-DC converter (i-ELOOP) terminal 4A and TAU terminal 2R
• Battery and TAU terminal 2R
If there is a common connector:
-
• Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
• Repair or replace the malfunctioning location.
If there is no common connector:
-
• Repair or replace the wiring harness which has an open circuit.
Go to Step 10.
|
|
6
|
INSPECT WIRING HARNESS BETWEEN TAU AND BODY GROUND FOR OPEN CIRCUIT
• Verify that the TAU connector is disconnected.
• Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground.
-
― TAU terminal 2W
• Is there continuity?
|
Yes
|
Go to the next step.
|
|
No
|
• Refer to the wiring diagram and verify if there is a common connector between the following terminals and body ground.
-
― TAU terminal 2W
If there is a common connector:
-
• Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
• Repair or replace the malfunctioning location.
Repair or replace the malfunctioning location.
-
• Repair or replace the wiring harness which has an open circuit.
• Go to Step 10.
|
|
7
|
DETERMINE IF MALFUNCTION CAUSE IS TAU
• Switch the ignition off.
• Disconnect the negative battery cable.
• Connect all the connectors.
• Reconnect the negative battery cable.
• Switch the ignition to ACC or ON (engine off or on).
• Launch the on-board diagnostic assist function.
• Select assist code “94”.
• Press the [ENTER] and verify that the sound is output from each speaker.
• Is sound output from each speaker in the order?
|
Yes
|
Troubleshooting completed (explain the contents of the servicing to the customer).
|
|
No
|
Replace the CMU, then go to Step 10.
|
|
8
|
INSPECT SPEAKERS
• Switch the ignition off.
• Disconnect the negative battery cable.
• Inspect the malfunctioning speaker.
• Is the speaker resistance normal?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the malfunctioning speaker, then go to Step 10.
|
|
9
|
INSPECT SPEAKER CIRCUIT FOR OPEN CIRCUIT
• Disconnect the connector of the malfunctioning speaker and the TAU connector.
• Verify the continuity of the wiring harness between the following terminals (vehicle wiring harness side) of the speakers which are malfunctioning.
-
― TAU terminal 2A and front door speaker (LH) terminal C
― TAU terminal 2C and front door speaker (LH) terminal B
― TAU terminal 2A and tweeter (LH) terminal B
― TAU terminal 2C and tweeter (LH) terminal A
― TAU terminal 2D and front door speaker (RH) terminal C
― TAU terminal 2F and front door speaker (RH) terminal B
― TAU terminal 2D and tweeter (RH) terminal B
― TAU terminal 2F and tweeter (RH) terminal A
― TAU terminal 2S and rear door speaker (LH) terminal C
― TAU terminal 2U and rear door speaker (LH) terminal B
― TAU terminal 2V and rear door speaker (RH) terminal C
― TAU terminal 2X and rear door speaker (RH) terminal B
• Is there continuity?
|
Yes
|
Go to the next step.
|
|
No
|
• Refer to the wiring diagram and verify if there is a common connector between the following terminals.
-
― TAU terminal 2A and front door speaker (LH) terminal C
― TAU terminal 2C and front door speaker (LH) terminal B
― TAU terminal 2A and tweeter (LH) terminal B
― TAU terminal 2C and tweeter (LH) terminal A
― TAU terminal 2D and front door speaker (RH) terminal C
― TAU terminal 2F and front door speaker (RH) terminal B
― TAU terminal 2D and tweeter (RH) terminal B
― TAU terminal 2F and tweeter (RH) terminal A
― TAU terminal 2S and rear door speaker (LH) terminal C
― TAU terminal 2U and rear door speaker (LH) terminal B
― TAU terminal 2V and rear door speaker (RH) terminal C
― TAU terminal 2X and rear door speaker (RH) terminal B
If there is a common connector:
-
― Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
― Repair or replace the malfunctioning location.
If there is no common connector:
-
― Repair or replace the wiring harness which has an open circuit.
• Go to the next step.
|
|
10
|
VERIFY IF MALFUNCTION CAUSE IS CORRECTED
• Switch the ignition off.
• Disconnect the negative battery cable.
• Connect all the connectors.
• Reconnect the negative battery cable.
• Switch the ignition to ACC or ON (engine off or on).
• Launch the on-board diagnostic assist function.
• Select assist code “94”.
• Press the [ENTER] and verify that the sound is output from each speaker.
• Is sound output from each speaker in the order?
|
Yes
|
Troubleshooting completed (explain the contents of the servicing to the customer).
|
|
No
|
Verify the malfunction symptom in the symptom troubleshooting chart and perform the other applicable malfunction diagnosis.
|
