DTC P1530: A/C1 Switch Circuit Intermittent

TECHNICAL DESCRIPTION
• The A/C-ECU sends the "ON" signal of the A/C to the ECM <M/T> or PCM <A/T>.
• The ECM <M/T> or PCM <A/T> receives the "ON" signal sent by the A/C-ECU, and turns the A/C relay to "ON" position.
DTC SET CONDITIONS

Check Conditions
Engine is running.

Judgement Criteria
• The A/C switch repeats on-off switches 255 times per second.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
• A/C-ECU failed.