Inspection Procedure
- CLEAR DTC
- Clear the DTC (see DTC CHECK/CLEAR ).
- CHECK DTC
- Check for DTC (see DTC CHECK/CLEAR
).
OK:
DTC B1244 output does not occur.
NG: Go to step 3
OK: NORMAL
- Check for DTC (see DTC CHECK/CLEAR
).
- READ VALUE USING TECHSTREAM (AUTOMATIC LIGHT CONTROL SENSOR)
- Using the Techstream, read the Data List.
Main Body
MAIN BODY DATA LISTTester Display Measurement Item/Range Normal Condition Diagnostic Note Illumination Rate Info Condition of automatic light control sensor/0 to 235600 Ix Condition value will be displayed - OK:
Output illuminance is as shown in table above.
NG: Go to step 4
OK: REPLACE MAIN BODY ECU
- Using the Techstream, read the Data List.
- CHECK MAIN BODY ECU (CLTB - CLTE VOLTAGE)
- Measure the voltage according to the value(s) in the table below.
Standard voltage
VOLTAGE SPECIFIED CONDITIONSTester Connection Switch Condition Specified Condition L12-20 (CLTB) - L12-18 (CLTE) Engine switch on (IG) 11 to 14 V Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE MAIN BODY ECU
OK: Go to next step
- Measure the voltage according to the value(s) in the table below.
- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)
- Disconnect the L12 ECU connector.
- Disconnect the M2 sensor connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE SPECIFIED CONDITIONSTester Connection Condition Specified Condition L12-20 (CLTB) - M2-6 (CLTB) Always Below 1 Ω L12-19 (CLTS) - M2-5 (CLTS) L12-18 (CLTE) - M2-3 (CLTE) L12-20 (CLTB) - Body ground Always 10 kΩ or higher L12-19 (CLTS) - Body ground L12-18 (CLTE) -Body ground Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AUTOMATIC LIGHT CONTROL SENSOR (See REMOVAL )