Toyota Progres JCG10 Hunting When A/C Turn on

1999 Toyota Progres JCG10 Auto Air conditioner

Situation
The engine idled erratically with hunting when I put on air conditioner.

Cause
Faulty air compressor.

Maintenance
The A/C lamp was blinking after idling with hunting for a while.
Then the car idled properly.
So I judged that air compressor was locked and checked it.
I confirmed the compressor was locked , and chaged rebuilt air compressor.

Toyota Progres JCG10 VSC Lamp Lit

1999 Toyota Progres JCG10 Engine Model 1JZ

Situation
VSC warning light and TRC OFF lamp illuminated.

Cause
Faulty Steering Sensor.

Maintenance
The engine run smoothly.
When I turned the steering wheel until the end, warning lapms illuminated.
Diagnosis noticed cord31 which meant faulty of the steering sensor.
I judged that the steering sensor was faulty.
Then I exchanged new steering sensor.
After that it worked properly.