Lexus Troubleshooting Questions? Ask a Lexus Expert
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There is no code, the light in the A/C switch flashes to indicate that the air conditioning compressor clutch has not engaged when the computer has commanded it to turn on. It knows this because of the revolution sensor mounted in the compressor. There is a technical service bulletin to address this issue. The A/C magnetic clutch relay in the fuse box under the hood is bad. As a test pull the horn relay and replace it with the magnetic clutch relay. If the A/C light stays on and the air conditioner blows cold air you'll need to order the updated magnetic clutch relay. The horn relay will work for a while but it can't handle the system. All of the relays are identified inside the lid of the fuse box under the hood.Skyvisions