Audio and Visual System (for Regular Cab and Double Cab)

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (for Regular Cab and Double Cab): 01-D6: No Master

DTC 01-D6 - No Master

DTC 01-D7 - Connection Check Error

DESCRIPTION





HINT:
- *1: Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage.
- *2: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the ignition switch in the ACC or ON position, this code is stored.
NOTICE:
- Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs.
- The radio receiver is the master unit.
- Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

INSPECTION PROCEDURE
NOTE: Be sure to read the DESCRIPTION before performing the following procedures.

PROCEDURE

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
(a) Refer to the radio receiver power source circuit Radio Receiver Power Source Circuit.
If the power source circuit is operating normally, proceed to the next step.
NEXT -- Continue to next step.
2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE
(a) Enter the diagnostic mode.




(b) Press the preset switch "3" to change to "Detailed Information Mode".
(c) Identify the component which has stored this code.

Component table:





HINT:
- "440 (stereo component amplifier)" is the component which has stored this 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.
3. CHECK COMPONENT WHICH HAS STORED THIS CODE
(a) Select the component which has stored this 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.
4. CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE
(a) Inspect the power source circuit of the component which has stored this code.

Component table:





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

NEXT -- Continue to next step.
5. 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.
6. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)
HINT: 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 radio receiver and the component which has stored this code.
(1) Disconnect all connectors between the radio receiver and the component which has stored this code.
(2) Check for an open or short in the AVC-LAN circuit between the radio receiver and the component which has stored this code.
OK:
There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. REPLACE COMPONENT WHICH HAS STORED THIS CODE
(a) Replace the component which has stored this code with a normal one and check if the same problem occurs again.
OK:
Same problem does not occur.

Result:





C -- REPLACE RADIO RECEIVER
B -- REPLACE RADIO RECEIVER
A -- END