Audio System DTC Troubleshooting: 2618
DTC 2618: LaneWatch Diag
NOTE:
Check the vehicle 12 volt battery condition first.
This audio DTC sets when Connection NG is indicated in the LaneWatch diagnosis (the LaneWatch icon is red in the System Links).
Before you troubleshoot, make sure to follow the General Troubleshooting Information.
Check the connectors for poor connections or loose terminals.
1.
Problem verification:

Problem verification
?1.
Clear the hard error codes.

?2.
Turn the vehicle to the OFF (LOCK) mode.

?3.
Wait for at least 6 seconds.

?4.
Check for hard error codes.

Is DTC 2618 indicated?

     
YES
     
     
     
The failure is duplicated, go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
2.
Determine possible failure area (LWC CAM VCC line, others):

Determine possible failure area (LWC CAM VCC line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
LaneWatch camera 6P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
LaneWatch camera 6P connector: disconnected
Test point 1
LaneWatch camera 6P connector (female terminals) No. 1:
Test point 2
Body ground


Is there about 8.0 V?

     
YES
     
     
     
The LWC CAM VCC wire is OK. Go to step 5.
     
NO
     
     
     
Go to step 3.
3.
Open wire check (LWC CAM VCC line):

Open wire check (LWC CAM VCC line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
LaneWatch camera 6P connector: disconnected
Test point 1
Audio unit connector B (24P) No. 8
Test point 2
Body ground

Is there about 8.0 V?

     
YES
     
     
     
There is an open in the wire. Replace the affected shielded harness.?
     
NO
     
     
     
The LWC CAM VCC wire is not open. Go to step 4.
4.
Shorted wire check (LWC CAM VCC line):

Shorted wire check (LWC CAM VCC line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Audio unit connector B (24P)

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
LaneWatch camera 6P connector: disconnected
 
Audio unit connector B (24P): disconnected
Test point 1
Audio unit connector B (24P) No. 8
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
There is a short to body ground in the wire. Replace the affected shielded harness.?
     
NO
     
     
     
5.
Determine possible failure area (SH LWC CAM line, others):

Determine possible failure area (SH LWC CAM line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
LaneWatch camera 6P connector: disconnected
Test point 1
LaneWatch camera 6P connector (female terminals) No. 2:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The SH LWC CAM wire is OK. Go to step 7.
     
NO
     
     
     
Go to step 6.
6.
Open wire check (SH LWC CAM line):

Open wire check (SH LWC CAM line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
LaneWatch camera 6P connector: disconnected
Test point 1
Audio unit connector B (24P) No. 9
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
There is an open in the wire(s). Replace the affected shielded harness.?
     
NO
     
     
     
7.
Shorted wire check (LWC UART line):

Shorted wire check (LWC UART line)
?1.
Disconnect the following connector.
Audio unit connector B (24P)

?2.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
LaneWatch camera 6P connector: disconnected
 
Audio unit connector B (24P): disconnected
Test point 1
Audio unit connector B (24P) No. 22
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
There is a short to body ground in the wire(s). Replace the affected shielded harness.?
     
NO
     
     
     
The LWC UART wire is not shorted to ground. Go to step 8.
8.
Open wire check (LWC UART line):

Open wire check (LWC UART line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
LaneWatch camera 6P connector: disconnected
 
Audio unit connector B (24P): disconnected
Test point 1
Audio unit connector B (24P) No. 22
Test point 2
LaneWatch camera 6P connector (female terminals) No. 6:


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
There is an open in the wire(s). Replace the affected shielded harness.?