Toyota Sienna Service Manual: No Master/ Connection Check Error
DTC 01-D6 No Master
DTC 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 the ACC or ON position, 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.
2 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:

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"
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:

4 INSPECT RADIO RECEIVER

- Disconnect the radio receiver connectors.
- Measure the resistance according to the value(s) in the
table below.
Standard resistance

*1: 10 Speaker System
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.

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
END
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: If the power connector is ...
DTC 01-DC Transmission Error
DESCRIPTION
HINT:
*1: This code may be stored if the engine is started, idled for 60 seconds and
then started again.
NOTICE:
Before starting troubl ...
Other materials:
Parking brake
Concept
The parking brake is used to prevent the vehicle
from rolling when it is parked.
Safety information
Warning
An unsecured vehicle can begin to move and
possibly roll away. There is a risk of accident.
Before exiting, secure the vehicle against rolling.
In order to ensure that the vehicle i ...
Disassembly
1. REMOVE SIDE DEFROSTER NOZZLE DUCT NO.1
(a) Remove the 2 screws <C> and defroster nozzle
duct No. 1.
2. REMOVE SIDE DEFROSTER NOZZLE DUCT NO.2
(a) Remove the 2 screws <C> and defroster nozzle
duct No. 2.
3. REMOVE DEFROSTER NOZZLE ASSEMBLY
(a) Remove the 4 screws <C> and d ...
Refrigerant
On-vehicle inspection
1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
(a) This method uses a manifold gauge set to locate
problem areas. Read the manifold gauge pressure
when these conditions are established.
Test conditions:
Temperature at the air inlet is 30 to 35°C (86 to
95 ...