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7B-48 Air Conditioning System: DTC B1531: Air Intake Control Actuator and/or Its Circuit Malfunction S6JB0B7204022 Wiring Diagram DTC Detecting Condition and Trouble Area 10 Position sensor signal circuit check 1) Measure voltage between “WHT/GRN” wire terminal of air intake control actuator connector and vehicle body Is voltage 0 V? Go to Step 11. “WHT/GRN” wire 11 Position sensor ground circuit check 1) Connect HVAC control module connector with ignition switch turned OFF. 2) Measure resistance between “BLK/RED” wire terminal of air intake control actuator connector and vehicle body Is resistance below 5 Ω ? Go to Step 12. Go to Step 13. 12 Position sensor ground circuit check 1) Measure resistance between “G52-13” terminal of HVAC control module connector and vehicle body ground. Is resistance below 5 Ω ? “BLK/RED” wire open or HVAC control module 13 Air intake control actuator check 1) Check air intake control actuator referring to “Air Intake Is it in good condition? HVAC control module Air intake control Step Action Yes No 12V 5V M 5V G52-22 G52-31 G52-32 G52-13 RED/WHT G52-14 BLK/RED GRN WHT/GRN ORN [A] 2 3 4 1 13 14 22 32 31 I5JB0A720027-01 [A]: HVAC control module connector “G52” (harness side view) 3. To other actuators 1. HVAC control module 4. To other sensors 2. Air intake control actuator DTC Detecting Condition Trouble Area Difference between target opening and actual opening is more than specified • Air intake control actuator circuit |