DESCRIPTION
INSPECTION PROCEDURE
CHECK RADIO RECEIVER POWER SOURCE CIRCUIT
INSPECT RADIO RECEIVER
IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)
REPLACE RADIO RECEIVER
DTC 01-DD Master Reset
DTC 01-E1 Voice Processing Device ON Error
DESCRIPTION
| DTC No. | DTC Detection Condition | Trouble Area |
| 01-DD | The device that should be the master has been disconnected after engine start | Radio receiver power source circuit
AVC-LAN circuit between the radio receiver and the component which has stored this code
Component which has stored this code
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01-E1
*1 | The AMP device records that the AMP output does not function even while the source device operates |
- *1: Even if no fault is present, this trouble code may be stored depending on the battery condition or engine start voltage.
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
- 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.
Disconnect the radio receiver connectors.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester Connection | Condition | Specified Condition |
| ATX+ - ATX- | Always | 60 to 80 Ω |
| TXM+ - TXM- | Always | 60 to 80 Ω |
| TX+ - TX- | Always | 60 to 80 Ω |
| 3.IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE |
Enter the diagnostic mode.
Press the preset switch "3" to change to "Detailed Information Mode".
Identify the component which has stored this code.
Component Table| Component | Physical address |
| Gateway ECU | 1C6 |
| Stereo component amplifier | 440 |
| Integration control & panel assembly | 1D8 |
"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" .
| 4.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE) |
- 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.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Replace the radio receiver with a normal one and check if the same problem occurs again.
- OK:
- Same problem does not occur.
| | REPLACE COMPONENT WHICH HAS STORED THIS CODE |
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LEXUS IS250, IS220d / GSE20 ALE20
