Toyota Sienna Service Manual: Light Sensor Circuit Malfunction
DTC B1244 Light Sensor Circuit Malfunction
DESCRIPTION
This DTC is output when failure in the light sensor circuit is detected.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|
B1244 |
|
|
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to DLC3.
- Turn the ignition switch ON and push the intelligent tester main switch ON.
- Select the items below in the DATA LIST, and read the displays on the intelligent tester
BODY NO.1:
2 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)
- Check for open or short circuit in the harness and the connector between the terminal 6 of the automatic light control sensor and the terminal B6-6 of the multiplex network body ECU.
- Check for open or short circuit in the harness and the connector between the terminal 3 of the automatic light control sensor and the terminal B6-4 of the multiplex network body ECU.
- Check for open or short circuit in the harness and the connector between the terminal 5 of the automatic light control sensor and the terminal B6-5 of the multiplex network body ECU
3 INSPECT AUTOMATIC LIGHT CONTROL SENSOR
- Measure voltage between the terminal 3 and the terminal 5 of the automatic light control sensor
Standard
4 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- Measure voltage between the terminal B6-6 and the terminal B6-4 of the multiplex network body ECU in the instrument panel junction block assembly.
Voltage
REPLACE AUTOMATIC LIGHT CONTROL SENSOR
Diagnostic trouble code chart
1. DTC CHECK
If a malfunction code is displayed during the DTC check ,
check the suspected area listed for that code in the table
below, and proceed to the appropriate page.
DIAGNOSTIC TROUBLE COD ...
Ignition Switch Circuit
DESCRIPTION
The Multiplex network body ECU receives the ACC and IG signals from the
ignition switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
Connect the in ...
Other materials:
Data list / active test
1. READ DATA LIST
HINT:
Using the intelligent tester's DATA LIST allows switch,
actuator and other item values to be read without
removing any parts. Reading the DATA LIST early in
troubleshooting is one way to save time.
Connect the intelligent tester with CAN VIM to the
DLC3.
&n ...
Cold Start Ignition Timing Performance
DESCRIPTION
This monitor will run when the engine is started at -10 to 50°C (14 to 122°F)
of the engine coolant
temperature. The DTC will set after the engine idling for 13 seconds (2 trip
detection logic).
The DTC is designed to monitor the idle air control at cold start. When the
...
Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to the clearance warning ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER
AMPLIFIER)
Disconnect the connectors from the clearance warning
ECU C9 and air conditioner amplifier con ...
