| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001AUML |
| Model Year Start: 2019 | Model: GR Corolla | Prod Date Range: [06/2018 - 01/2019] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): B241A; Rear Height Control Sensor; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] | ||
|
DTC |
B241A |
Rear Height Control Sensor |
DESCRIPTION
The headlight ECU sub-assembly LH determines the vehicle height and performs automatic headlight beam level control based on signals from the rear height control sensor sub-assembly LH via direct line.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
|---|---|---|---|---|
|
B241A |
Rear Height Control Sensor |
Detection condition:
Malfunction status:
Malfunction duration:
|
|
Headlight ECU sub-assembly LH |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
Click here
![2019 - 2021 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 06/2021]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): INITIALIZATION](/t3Portal/stylegraphics/info.gif)
-
If any of the following are performed, it is necessary to initialize the headlight ECU sub-assembly LH.
Click here
- Replacement of the rear height control sensor sub-assembly LH
- Removal/installation of the rear height control sensor sub-assembly LH
- Work that changes the vehicle height such as replacement of suspension components
- When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
|
1. |
CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.
(e) Clear the DTCs.
Body Electrical > AFS > Clear DTCs
|
|
2. |
CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Wait 10 seconds or more.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / AFS / Trouble Codes.
(f) Check for DTCs.
Body Electrical > AFS > Trouble Codes
OK:
DTC B241A is not output.
| OK |
|
|
|
3. |
INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH |
(a) Remove the rear height control sensor sub-assembly LH.
Click here
(b) Inspect the rear height control sensor sub-assembly LH.
Click here
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH - HEADLIGHT UNIT ASSEMBLY LH (HEADLIGHT CORD)) |
(a) Disconnect the A23 headlight unit assembly LH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Q2-3 (SHB) - A23-5 |
Always |
Below 1 Ω |
|
Q2-2 (SHRR) - A23-6 |
Always |
Below 1 Ω |
|
Q2-1 (SHG) - A23-2 |
Always |
Below 1 Ω |
|
Q2-3 (SHB) or A23-5 - Body ground |
Always |
10 kΩ or higher |
|
Q2-2 (SHRR) or A23-6 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT HEADLIGHT UNIT ASSEMBLY LH (HEADLIGHT CORD) |
|
*1 |
Headlight Unit Assembly LH (Headlight Cord) |
- |
- |
|
*a |
Component without harness connected (to Headlight ECU Sub-assembly LH) |
*b |
Component without harness connected (to Wire Harness) |
(a) Remove the headlight unit assembly LH.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A23-5 - A-16 (SBR) |
Always |
Below 1 Ω |
|
A23-6 - A-17 (SHRL) |
Always |
Below 1 Ω |
|
A23-2 - A-15 (SGR) |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
|
|