geo Workshop Repair Guides

Geo Workshop Service and Repair Manuals

ABOUT US
Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] > < Valve Clearance|Specifications|Page 1551

Prizm L4-1600cc 1.6L DOHC VIN 5 (1989)

  • Powertrain Management
  • Computers and Control Systems
  • A/C Signal
  • Component Information
  • Description and Operation

Page 1
background image

A/C Signal: Description and Operation

This signal is sent from the A/C amplifier. When the A/C clutch is energized the A/C amplifier will pull a signal line low that is in series with the A/C
vacuum switching valve solenoid. The ECM uses this signal to adjust air/fuel mixture for the lean condition that the A/C VSV solenoid creates. The
vehicles engine speed will be increased slightly to prevent stalling.

  • Powertrain Management
  • Computers and Control Systems
  • A/C Signal
  • Component Information
  • Description and Operation

Manifold Air Temperature (MAT) Sensor <--> [Intake Air Temperature Sensor] > < Valve Clearance|Specifications|Page 1551