- Malfunction of light sensor
- Open or short of light sensor circuit
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Vehicle Exterior | Section: Lighting (ext) | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002WP3005X |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
B1244 |
Light Sensor Circuit Malfunction |
DESCRIPTION
This DTC is output when a failure of the automatic light control sensor circuit is detected.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1244 |
When either condition below is met: |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT FOR DTC |
(a) Clear the DTC
.
(b) Recheck for DTC
.
OK:
DTC B1244 is not output.
|
|
2. |
READ VALUE USING TECHSTREAM (AUTOMATIC LIGHT CONTROL SENSOR) |
(a) Operate the Techstream according to the display and select Data List.
Main Body
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Illumination Rate |
Illumination rate / min.: 0, max.: 99.99 |
Actual illumination rate is displayed |
- |
OK:
Output illumination is as shown in table above.
|
|
3. |
INSPECT AUTOMATIC LIGHT CONTROL SENSOR (SYSTEM VOLTAGE) |
|
(a) Disconnect the I21 automatic light control sensor connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I21-6 (CLTB) - I21-3 (CLTE) |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
(c) Reconnect the automatic light control sensor connector.
|
|
4. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR) |
|
(a) Disconnect the H3 main body ECU connector. |
(b) Disconnect the I21 automatic light control sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H3-20 (CLTB) - I21-6 (CLTB) |
Always |
Below 1 Ω |
|
H3-19 (CLTS) - I21-5 (CLTS) |
Always |
Below 1 Ω |
|
H3-18 (CLTE) - I21-3 (CLTE) |
Always |
Below 1 Ω |
|
H3-20 (CLTB) - Body ground |
Always |
10 kΩ or higher |
|
H3-19 (CLTS) - Body ground |
Always |
10 kΩ or higher |
|
H3-18 (CLTE) - Body ground |
Always |
10 kΩ or higher |
(d) Reconnect the automatic light control sensor connector.
(e) Reconnect the main body ECU connector.
|
|
|