Bluetooth Handsfree Module Communication Error

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (for Regular Cab and Double Cab): Bluetooth Handsfree Module Communication Error

Bluetooth Handsfree Module Communication Error

INSPECTION PROCEDURE

PROCEDURE

1. IDENTIFY COMPONENT SHOWN BY SUB-CODE
(a) Enter the diagnostic mode.




(b) Press the preset switch "3" to change to "Detailed Information Mode".
(c) Identify the component shown by the sub-code.
HINT:
- "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration.
- For details of the DTC display, refer to "DTC CHECK/CLEAR" Audio and Visual System (for Regular Cab and Double Cab).

NEXT -- Continue to next step.
2. CHECK COMPONENT SHOWN BY SUB-CODE
(a) Select the component shown by sub-code.
HINT: The "Bluetooth" handsfree module is built into the radio receiver. If there is a problem between the "Bluetooth" handsfree module and radio receiver, replace the radio receiver.

Component table:





B -- REPLACE RADIO RECEIVER
A -- REPLACE RADIO RECEIVER
C -- Continue to next step.
3. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE
(a) Inspect the power source circuit of the component shown by the sub-code.

Component table:





- If the power source circuit is operating normally, proceed to the next step.

NEXT -- Continue to next step.
4. INSPECT RADIO RECEIVER




(a) Disconnect the K4 receiver connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






Result:





C -- REPLACE RADIO RECEIVER
B -- REPLACE RADIO RECEIVER
A -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR ("BLUETOOTH" HANDSFREE MODULE - COMPONENT SHOWN BY SUB-CODE)
HINT:
- Start the check from the circuit that is near the component shown by the sub-code first.
- For details of the connectors, refer to the "TERMINALS OF ECU" Audio and Visual System (for Regular Cab and Double Cab).
(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the "Bluetooth" handsfree module and the component shown by the sub-code.
(1) Disconnect all connectors between the "Bluetooth" handsfree module and the component shown by the sub-code.
(2) Check for an open or short in the AVC-LAN circuit between the "Bluetooth" handsfree module and the component shown by the sub-code.
OK:
There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. REPLACE COMPONENT SHOWN BY SUB-CODE
(a) Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.
OK:
Same problem does not occur.

Result:





C -- REPLACE RADIO RECEIVER (BUILT-IN "BLUETOOTH HANDSFREE MODULE")
B -- REPLACE RADIO RECEIVER (BUILT-IN "BLUETOOTH" HANDSFREE MODULE)
A -- END