DTC Troubleshooting: 12, 18

LKAS Control Unit DTC 12: Lost Communication with the LKAS Camera LKAS Control Unit DTC 18: LKAS Camera Packet Communication Error

1. Clear the DTC using the HDS.

1. Turn the ignition switch OFF, then turn it ON (II), and wait for 20 seconds or more.

1. Watch the adaptive cruise control (ACC)/LKAS indicator.

Does the adaptive cruise control (ACC)/LKAS indicator come on?

YES | - | Go to Step 4 .
NO | - | Intermittent failure, the system is OK at this time.■

1. Check for DTCs with HDS.

Is DTC 12 or 18 indicated?

YES | - | Go to Step 5 .
NO | - | Do the appropriate troubleshooting for the code indicated.■

1. Turn the ignition switch OFF, then turn it ON (II).

1. Measure the voltage between LKAS camera 10P connector terminal No. 5 and body ground.

Is there battery voltage?

YES | - | Go to Step 7 .
NO | - | Check the No. 29 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 29 (7.5 A) fuse in the under-dash fuse/relay box and LKAS camera.■

1. Turn the ignition switch OFF.

1. Disconnect the LKAS control unit 26P connector and the LKAS camera 10P connector.

1. Turn the ignition switch ON (II).

1. Measure the voltage between body ground and LKAS camera 10P connector terminal No. 3 and No. 4 individually.

Is there battery voltage?

YES | - | Repair short to power in the wire between LKAS camera and LKAS control unit.■
NO | - | Go to Step 11 .

1. Turn the ignition switch OFF.

1. Check for continuity between body ground and LKAS camera 10P connector terminal No. 3 and No. 4 individually.

Is there continuity?

YES | - | Repair short to body ground in the wire between LKAS camera and LKAS control unit.■
NO | - | Go to Step 13 .

1. Check for continuity between LKAS control unit 26P connector terminal No. 11 and LKAS camera 10P connector terminal No. 4.

Is there continuity?

YES | - | Go to Step 14 .
NO | - | Repair an open in the wire between LKAS camera and LKAS control unit.■

1. Check for continuity between LKAS control unit 26P connector terminal No. 24 and LKAS camera 10P connector terminal No. 3.

Is there continuity?

YES | - | Check for loose terminals in the LKAS camera and LKAS control unit connectors, and repair if necessary. If no poor connections are found, replace the LKAS camera and LKAS control unit as a set.■
NO | - | Repair an open in the wire between LKAS camera and LKAS control unit.■