Toyota CH-R Service Manual: Height Control Sensor Malfunction (B2416,B241A)

Toyota CH-R Service Manual / Lighting (ext) / Automatic Headlight Beam Level Control System / Height Control Sensor Malfunction (B2416,B241A)

DESCRIPTION

This DTC is stored when the headlight ECU sub-assembly LH detects a malfunction in the rear height control sensor sub-assembly LH power source circuit or rear height control sensor sub-assembly LH circuit. The headlight ECU sub-assembly LH stores DTC B2416 and B241A.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2416	Height Control Sensor Malfunction	Any of the following conditions is met: Malfunction in rear height control sensor sub-assembly LH Open in rear height control sensor sub-assembly LH power source circuit Short in rear height control sensor sub-assembly LH power source circuit	Rear height control sensor sub-assembly LH Headlight ECU sub-assembly LH Harness or connector	-
B241A	Rear Height Control Sensor	Any of the following conditions is met: Malfunction in rear height control sensor sub-assembly LH Open in rear height control sensor sub-assembly LH circuit Short in rear height control sensor sub-assembly LH circuit	Rear height control sensor sub-assembly LH Headlight ECU sub-assembly LH Harness or connector	-

DTC Detection Conditions (DTC B2416 and B241A):

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	Ignition switch ON	○	○	○
Malfunction Status	Malfunction in rear height control sensor sub-assembly LH	○	-	-
	Open in rear height control sensor sub-assembly LH power source circuit	-	○	-
	Short in rear height control sensor sub-assembly LH power source circuit	-	-	○
Detection Time		-	-	-
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before performing this inspection, check that the rear height control sensor sub-assembly LH is installed correctly.
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
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

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Check for DTCs.

Click here

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2416 or B241A are not output.

USE SIMULATION METHOD TO CHECK

3.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Height Sens Pw Supply Val	Rear height control sensor sub-assembly LH power supply value	0 to 5.00 V	4.61 to 5.00 V	-
Rr Height Sens Signal Val	Rear height control sensor sub-assembly LH signal value	0 to 5.00 V	0.50 to 4.50 V	Value changes according to vehicle height

Body Electrical > HL AutoLeveling > Data List

Tester Display
Height Sens Pw Supply Val
Rr Height Sens Signal Val

OK:

Normal condition listed above is displayed.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

4.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH)

(a) Disconnect the A16 headlight ECU sub-assembly LH connector.

(b) Disconnect the O2 rear height control sensor sub-assembly LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A16-16 (SBR) - O2-3 (SHB)	Always	Below 1 Ω
A16-17 (SHRL) - O2-2 (SHRR)	Always	Below 1 Ω
A16-15 (SGR) - O2-1 (SHG)	Always	Below 1 Ω
A16-16 (SBR) or O2-3 (SHB) - Body ground	Always	10 kΩ or higher
A16-17 (SHRL) or O2-2 (SHRR) - Body ground	Always	10 kΩ or higher
A16-15 (SGR) or O2-1 (SHG) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	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

OK:

Rear height control sensor sub-assembly LH is normal.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

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