DTC 01-DD Master Reset; DTC 01-E1 Voice Processing Device ON Error: Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
01-DD *1	The device that should be the master has been disconnected after the engine starts	Multi-display power source circuit AVC-LAN circuit between the multi-display and the component which has stored this code Multi-display Component which has stored this code
01-E1 *2	The AMP device records that the AMP output does not function even while the source device is operating
HINT: 1: This code may be stored if the engine is started and the ignition switch is turned to the START position again. 2: Even if no failure is detected, a trouble code may be recorded depending on the battery condition or engine start voltage.

NOTE:

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 multi-display is the master unit.
Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

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

CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT
Refer to MULTI-DISPLAY POWER SOURCE CIRCUIT .

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

INSPECT RADIO RECEIVER

Disconnect the radio receiver connectors.

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

Resistance

ECU CONNECTOR TERMINAL RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
ATX+ (R2-5) - ATX- (R2-15)	Always	60 to 80 Ω
TX+ (R3-9) - TX- (R3-10)	Always	60 to 80 Ω
TX+ (R4-9) - TX- (R4-10)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER

Fig 1: Identifying Radio Receiver Connectors Connector terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP.

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.
Press the "LAN Mon" switch to change to "LAN Monitor" mode.

Identify the component which has stored this code.

Fig 2: LAN Monitor Mode Change Display

Component Table

COMPONENT REFERENCE

Display	Component
AUDIO H/U	Radio receiver
DSP-AMP	Stereo component amplifier
G/W	Gateway ECU
NAVI	Navigation ECU
CAMERA	Television camera ECU
RSE	Multi-display controller

HINT:

"NAVI" is the component which has stored this code in the example shown in the illustration.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE)
HINT:

For details of the connectors, refer to "TERMINALS OF ECU " .
1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display and the component which has stored this code.
  1. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.
    OK: There is no open or short circuit.
    
    Fig 3: AVC-LAN Communication - Wiring Diagram (With Rear Seat Entertainment System)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 4: AVC-LAN - Wiring Diagram (Without Rear Seat Entertainment System)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.
REPLACE MULTI-DISPLAY
1. Replace the multi-display with a normal one and check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END