Dtc 01-D6 No Master

Lexus IS250 IS220d GSE20 ALE20 - AUDIO / VISUAL

DESCRIPTION

INSPECTION PROCEDURE

CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE

INSPECT RADIO RECEIVER

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)

REPLACE COMPONENT WHICH HAS STORED THIS CODE

DTC 01-D6 No Master

DTC 01-D7 Connection Check Error

DESCRIPTION

DTC No.DTC Detection ConditionTrouble Area
01-D6
*1		When either of the following conditions is met:
The device that stores (stored) the code has (had) been disconnected when the engine switch is on (ACC or IG)
The master device has (had) been disconnected when this code is stored
Radio receiver power source circuit
Power source circuit of the component which has stored this code
AVC-LAN circuit between the radio receiver and the component which has stored this code
Component which has stored this code
Radio receiver
01-D7
*2		When either of the following conditions is met:
The device that stored the code has (had) been disconnected after the engine starts (started)
The master device has (had) been disconnected when this code is (was) stored
  • 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 engine switch on (ACC or IG), 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

  • NOTICE:
  • Be sure to read DESCRIPTION before performing the following procedures.
1.CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

Refer to the radio receiver power source circuit .


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


NEXT
2.IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Dtc 01-D6 No Master. AUDIO / VISUAL. Lexus IS250 IS220d GSE20 ALE20

Press the preset switch "3" to change to "Detailed Information Mode".

Identify the component which has stored this code.

Component Table:
ComponentPhysical address
Gateway ECU1C6
Stereo component amplifier440
Integration control & panel assembly1D8
  • 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" .
NEXT
3.CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE

Inspect the power source circuit of the component which has stored this code.


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

Component Table:
ComponentProceed to
Gateway ECUGateway ECU power source circuit
Stereo component amplifierStereo component amplifier power source circuit
Integration control & panel assemblyIntegration control & panel assembly power source circuit
NEXT
4.INSPECT RADIO RECEIVER
Dtc 01-D6 No Master. AUDIO / VISUAL. Lexus IS250 IS220d GSE20 ALE20

Disconnect the radio receiver connectors.

Measure the resistance according to the value(s) in the table below.

  • Standard resistance:
  • Tester ConnectionConditionSpecified Condition
    ATX+ - ATX-Always60 to 80 Ω
    TXM+ - TXM-Always60 to 80 Ω
    TX+ - TX-Always60 to 80 Ω
NG
REPLACE RADIO RECEIVER
OK
5.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)
  • HINT:
  • For details of the connectors, refer to the "TERMINALS OF ECU" .

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.


Disconnect all connectors between the radio receiver and the component which has stored this code.

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.

Dtc 01-D6 No Master. AUDIO / VISUAL. Lexus IS250 IS220d GSE20 ALE20

NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
6.REPLACE COMPONENT WHICH HAS STORED THIS CODE

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.
NG
REPLACE RADIO RECEIVER
OK
END