Navigation System (for CrewMax)

NAVIGATION: NAVIGATION SYSTEM (for CrewMax): 01-D6: No Master

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 ON or ACC, 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 navigation 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
NOTE: Be sure to read the DESCRIPTION before performing the following procedures.

PROCEDURE

1. CHECK NAVIGATION RECEIVER POWER SOURCE CIRCUIT
(a) Refer to the navigation receiver power source circuit Navigation Receiver Assembly Power Source Circuit.
If the power source circuit is operating normally, proceed to the next step.
NEXT -- Continue to next step.
2. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE





(a) Enter the diagnostic mode.
(b) Press the "LAN Mon" switch to change to "LAN Monitor" mode.
(c) Identify the component which has stored this code.

Component table





HINT:
- "DSP-AMP" is the component which has stored this code in the example shown in the illustration.
- *: w/ Rear Seat Entertainment System

NEXT -- Continue to next step.
3. CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE
(a) Inspect the power source circuit of the component which has stored this code.

Component table





HINT: *: w/ Rear Seat Entertainment System
If the power source circuit is operating normally, proceed to the next step.
NEXT -- Continue to next step.
4. INSPECT NAVIGATION RECEIVER





(a) Disconnect the K18 and K8 receiver connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





HINT: *: w/ Rear Seat Entertainment System

Result





C -- REPLACE NAVIGATION RECEIVER
B -- REPLACE NAVIGATION RECEIVER
A -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)
HINT: For details of the connectors, refer to "TERMINALS OF ECU" Navigation System (for CrewMax).
(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the navigation receiver and the component which has stored this code.
(1) Disconnect all connectors between the navigation receiver and the component which has stored this code.
(2) Check for an open or short in the AVC-LAN circuit between the navigation receiver and the component which has stored this code.
OK:
There is no open or short circuit.









NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. REPLACE COMPONENT WHICH HAS STORED THIS CODE
(a) 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.

Result





C -- REPLACE NAVIGATION RECEIVER
B -- REPLACE NAVIGATION RECEIVER
A -- END