B156E

NAVIGATION: NAVIGATION SYSTEM (w/ USB Audio System): B156B, B156E: Multi-media Interface ECU Disconnected
B156E - No Response from Multi-media Interface ECU

DESCRIPTION

The navigation receiver assembly and multi-media interface ECU are connected by the AVC-LAN communication line.

When an AVC-LAN communication error occurs between the navigation receiver assembly and multi-media interface ECU, these DTCs will be stored.

HINT
* *: Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.
* The navigation receiver assembly is the master unit.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Check for optional components.

(1) Check that optional components (including associated wiring) which generate radio waves are not installed.

Result:

HINT
* Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
* This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.

B -- CHECK DTC
A -- Continue to next step.

2. REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Remove optional components (including associated wiring).

NOTICE:
Do not remove optional components or associated wiring without the permission of the customer.

NEXT -- Continue to next step.

3. CHECK DTC

(a) Clear the DTCs Navigation System (w/ USB Audio System).

(b) Recheck for DTCs and check if the same trouble occurs again.

OK:

No DTCs are output.

NG -- CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU POWER SOURCE)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

4. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU POWER SOURCE)

(a) Disconnect the J107 multi-media interface ECU connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU - NAVIGATION RECEIVER ASSEMBLY)

(a) Disconnect the J107 multi-media interface ECU connector.

(b) Disconnect the K8 navigation receiver assembly connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE MULTI-MEDIA INTERFACE ECU

(a) Replace the multi-media interface ECU Removal.

(b) Clear the DTCs Navigation System (w/ USB Audio System).

(c) Recheck for DTCs and check if the same trouble occurs again.

OK:

No DTCs are output.

NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal

OK -- END