CODE No. C2327 Radar module dirt

caution

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

note

The radar may not function normally if foreign object or dirt (snow or ice) is adhered on the radar or its surrounding area, or the road condition is bad due to a severe weather (heavy rain or snow). In that case, the system will deactivate the blind spot warning and rear cross traffic alert as system protection and display an alert icon on the combination meter.

OPERATION

The BSW-ECU (slave) incorporates a radar. The BSW-ECU (slave) monitors whether the radar or its surrounding area is contaminated or its beam is blocked by foreign material.

CHECK CONDITION

When all of the conditions below are satisfied:

Ignition switch is in the ON position.
BSW-ECU (slave) system voltage is at 9-16 V.
The blind spot warning lamp switch is ON.
The vehicle is driven at 10km/h or more.

DIAGNOSTIC FUNCTION AND JUDGEMENT CRITERIA

The BSW-ECU (slave) sets diagnosis code No.C2327 when the system cannot detect a radar precisely for at least 10 minutes or the vehicle is driven for 10 km or more with the radar detected poorly.

PROBABLE CAUSES

Bad weather (heavy rain, snow, icing, etc.)
Road condition or ambient environment
The radar or rear bumper is contaminated by dirt or foreign material, etc.
Improperly installed BSW-ECU (slave)
Malfunction of BSW-ECU (slave)

DIAGNOSIS PROCEDURE

STEP 1. Check the radar or the rear bumper for dirt or foreign material.

Q. Is the check result normal?

Go to Step 2.

Clean foreign materials.

STEP 2. Check the rear bumper for scratches or dents.

Q. Is the check result normal?

Go to Step 3.

Replace the rear bumper assembly.

STEP 3. Check whether the diagnosis code is set again.

Check again if the diagnosis code is set in the BSW-ECU (slave).

(1)Erase the diagnosis code.

(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.

(3)Drive the vehicle for at least 10 minutes. Then check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the BSW-ECU (slave).

A component protection has been triggered due to a bad weather or unfavourable environments. This is not a malfunction.