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B1244/44 - Light Sensor Circuit Malfunction

  1. Connect scan tool to DLC3. DLC3 connector is located under left side of instrument panel. Turn ignition on. Using scan tool, check light sensor output frequency. If frequency is 47-1200 Hz, go to next step. If frequency is not 47-1200 Hz, replace light sensor.
  2. Check open or short in wires between body ECU 18-pin connector "D" terminals No. 4, No. 13 and No. 14 and light sensor connector terminals No. 4, No. 5 and No. 6. See Figure. Light sensor is located is left side of dash cover. See WIRING DIAGRAMS. If open or short is found, repair wire or connector as necessary. If open or short is not found, replace body ECU. Retest system.
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