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Test No. 20 : Light Sensor Circuit

NOTE: LEXUS scan tool must be used for this test.
  1. Using scan tool, check light sensor output frequency. If light sensor frequency output is 47-1200 Hertz, go to next step. If light sensor frequency output is not 47-1200 Hertz, replace light sensor and retest system operation.
  2. Check circuits for faults between light sensor and body control ECU No. 2. See WIRING DIAGRAMS . Repair or replace as necessary. If circuits are okay, perform appropriate pin voltage test under BODY CONTROL ECU PIN VOLTAGE TESTS  under COMPONENT TESTS. Replace as necessary and retest system operation.
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