Toyota Corolla Cross: Rear Height Sensor Circuit Voltage Out of Range (B241A1C)
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 |
|---|---|---|---|
|
B241A1C | Rear Height Sensor Circuit Voltage Out of Range | Detection condition:
|
|
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.
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- If any of the following are performed, it is necessary to initialize the headlight ECU sub-assembly LH.
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- 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
PROCEDURE
|
1. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Headlight Control > Clear DTCs
|
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| 2. |
CHECK FOR DTC |
(a) Turn the ignition switch to ON.
(b) Wait 10 seconds or more.
(c) Check for DTCs.
Body Electrical > Headlight Control > Trouble CodesOK:
DTC B241A1C is not output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
| 3. |
INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH |
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| NG | | REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH |
|
| 4. |
CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY LH) |
(a) Disconnect the Q1 rear height control sensor sub-assembly LH connector.
(b) Disconnect the A159 headlight ECU sub-assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
Q1-3 (SHB) - A159-16 (SBR) |
Always | Below 1 Ω |
|
Q1-2 (SHRR) - A159-17 (SHRL) |
Always | Below 1 Ω |
|
Q1-1 (SHG) - A159-15 (SGR) |
Always | Below 1 Ω |
|
Q1-3 (SHB) - Body ground |
Always | 10 kΩ or higher |
|
A159-16 (SBR) - Body ground |
Always | 10 kΩ or higher |
|
Q1-2 (SHRR) - Body ground |
Always | 10 kΩ or higher |
|
A159-17 (SHRL) - Body ground |
Always | 10 kΩ or higher |
| OK | | REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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