DTC 01-D7
AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: 01-D6,01-D7: No Master
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 ACC or ON, this code is stored.
NOTICE:
* Before starting troubleshooting, be sure to clear DTCs to clear codes stored due to the reasons described in Hint above. Then, check for DTCs and troubleshoot according to the output DTCs.
* The radio receiver assembly is the master unit.
* Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Be sure to read Description before performing the following procedures.
PROCEDURE
1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
(a) Refer to Radio Receiver Power Source Circuit Radio Receiver Power Source Circuit.
HINT
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 "channel 3" to change to "Detailed Information Mode".
(c) Identify the component which has stored this code.
Component Table
*1: w/ Stereo Component Amplifier
*2: w/ Rear Seat Entertainment System
*3: w/ USB Audio System
*4: w/ Satellite Radio
HINT
* "440 (stereo component amplifier assembly)" 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" Reading and Clearing Diagnostic Trouble Codes.
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 assembly. If there is a problem between the "Bluetooth" handsfree module and radio receiver assembly, replace the radio receiver assembly.
Component Table
*1: w/ Satellite Radio
*2: for Column Shift Type
*3: for Floor Shift Type
C -- REPLACE RADIO RECEIVER ASSEMBLY Removal
B -- REPLACE RADIO RECEIVER ASSEMBLY Removal
A -- 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.
HINT
If the power source circuit is operating normally, proceed to the next step.
Component Table
*1: w/ Stereo Component Amplifier
*2: w/ Rear Seat Entertainment System
*3: w/ USB Audio System
NEXT -- Continue to next step.
5. INSPECT RADIO RECEIVER ASSEMBLY
(a) Disconnect the K4*1 and K22*2 radio receiver assembly connectors.
*1: w/ Stereo Component Amplifier
*2: w/ USB Audio System
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
*1: w/ Stereo Component Amplifier
*2: w/ USB Audio System
Result
C -- REPLACE RADIO RECEIVER ASSEMBLY Removal
B -- REPLACE RADIO RECEIVER ASSEMBLY Removal
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 "Terminals of ECU" Pinout Values and Diagnostic Parameters.
(a) Referring to the wiring diagram, check the AVC-LAN circuit between the radio receiver assembly and the component which has stored this code.
(1) Disconnect all connectors between the radio receiver assembly and the component which has stored this code.
(2) Check for an open or short in the AVC-LAN circuit between the radio receiver assembly 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:
Some problem does not occurs.
Result
C -- REPLACE RADIO RECEIVER ASSEMBLY Removal
B -- REPLACE RADIO RECEIVER ASSEMBLY Removal
A -- END