3.
Has a problem been found?
 | ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to "Signal Circuit Inspection" procedure. |
Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
| ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Signal Circuit Inspection" procedure. |
IG "ON"
Disconnect temperature sensor connector.
Measure voltage between signal terminal of temperature sensor harness connector and chassis ground.
Specification : Approx. 5V
Is the measured value within specifications?
| ▶ Go to "Ground Circuit Inspection" procedure. |
| ▶ Repair open or short in the signal circuit between ALS ECU and temperature sensor harness connector and then go to "Verification of Vehicle Repair" procedure. |
IG "OFF"
Disconnect temperature sensor connector and ALS ECU connector.
Measure resistance between ground terminal of temperature sensor harness connector and temperature sensor's signal terminal of ALS ECU harness connector.
Specification : Below approx. 1Ω
Is the measured value within specifications?
| ▶ Substitute with a known-good compressor ASS'Y and check for proper operation. If problem is corrected, replace compressor ASS'Y and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Repair open in the ground circuit between ALS ECU harness connector and temperature sensor harness connector and then go to "Verification of Vehicle Repair" procedure. |
