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

DTC DETECTION CONDITION

DTC No. DTC Detection Condition Trouble Area
01-DD 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
(1)		 The AMP device records that the AMP output does not function even while the source device is operating.
HINT:
(1) Even if no fault is present, this trouble code may be stored 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.
  1. CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT 

    Refer to the Multi-display Power Source Circuit  .

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

  2. INSPECT RADIO RECEIVER 
    1. Disconnect the radio receiver connectors.
    2. Measure the resistance according to the value(s) in the table below.
      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      ATX+ (J66-5) -ATX-(J66-15) Always 60 to 80Ω
      TX+ (J63-9) -TX-(J63-10) Always 60 to 80Ω
    Fig 1: Identifying Radio Receiver/CD-DVD Connectors & Terminals
    G04059537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RADIO RECEIVER 

    OK: Go to next step. 

  3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component which has stored this code.
      COMPONENT DESCRIPTION

      Display Component
      AUDIO H/U Radio receiver
      DSP-AMP Stereo component amplifier
      G/W Gateway ECU
      NAVI Navigation ECU
      Fig 2: Identifying LAN Monitor Mode
      G04050384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

  4. 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. Disconnect all connectors between the multi-display and the component which has stored this code.
      2. 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 Wiring Diagram
    G04050385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  5. 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 

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