Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - LIGHTING EXT

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

READ VALUE USING INTELLIGENT TESTER (AUTOMATIC LIGHT CONTROL SENSOR)

CHECK MAIN BODY ECU (LIGHT CONTROL SENSOR VOLTAGE)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)

DTC B1244 Light Sensor Circuit Malfunction

DESCRIPTION

This DTC is stored when a failure of the automatic light control sensor circuit is detected.

DTC CodeDTC Detection Condition Trouble Area
B1244When either condition below is met:
Malfunction of the automatic light control sensor.
Open or short in the light sensor circuit.
Automatic light control sensor
Harness or connector
Main body ECU

WIRING DIAGRAM

Dtc B1244 Light Sensor Circuit Malfunction. LIGHTING EXT. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

1.CHECK FOR DTC

Clear the DTC ().

Recheck for DTC ().

  • OK:
  • DTC B1244 is not output.
NG
Go to step 2
OK
USE SIMULATION METHOD TO CHECK ()
2.READ VALUE USING INTELLIGENT TESTER (AUTOMATIC LIGHT CONTROL SENSOR)

Operate the intelligent tester according to the display and select "Data List".

Main Body
Tester DisplayMeasurement Item/RangeNormal ConditionDiagnostic Note
Illumination Rate InfoIllumination rate/min.: 0, max.: 99.99Actual illumination rate is displayed-
  • OK:
  • Output illuminance is as shown in table above.
NG
Go to step 3
OK
REPLACE MAIN BODY ECU
3.CHECK MAIN BODY ECU (LIGHT CONTROL SENSOR VOLTAGE)
Dtc B1244 Light Sensor Circuit Malfunction. LIGHTING EXT. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Measure the voltage according to the value(s) in the table below.

  • Standard Voltage:
  • Tester Connection Switch Condition Specified Condition
    E2-20 (CLTB) - E2-18 (CLTE) Ignition switch ON11 to 14 V
    Ignition switch offBelow 1 V
NG
REPLACE MAIN BODY ECU
OK
4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)
Dtc B1244 Light Sensor Circuit Malfunction. LIGHTING EXT. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E2 ECU connector.

Disconnect the F9 sensor connector.

Measure the resistance according to the value(s) in the table below.

  • Standard Resistance:
  • Tester Connection Condition Specified Condition
    E2-20 (CLTB) - F9-6 (CLTB)AlwaysBelow 1 Ω
    E2-19 (CLTS) - F9-5 (CLTS)
    E2-18 (CLTE) - F9-3 (CLTE)
    E2-20 (CLTB) - Body groundAlways10 kΩ or higher
    E2-19 (CLTS) - Body ground
    E2-18 (CLTE) - Body ground
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE AUTOMATIC LIGHT CONTROL SENSOR ()
LIGHTING EXT
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
LIGHTING SYSTEM