Left Hand Drive
CIRCUIT OPERATIONWhen the ignition switch is in the ACCESSORY or RUN position it connects circuit A1 from fuse 8 in the Power Distribution Center (PDC) to circuit A48. Circuit A48 powers circuit C7 through fuse 5 in the fuse block. When the A/C-heater control switch is moved to an A/C position or the defrost position, it connects circuit C7 to circuit C90. Circuit C9O provides the A/C select signal to cavity C23 of the Powertrain Control Module (PCM).
Circuit C90 also connects to the A/C cycling switch. Circuit C21 from the cycling switch connects to the low pressure switch. If the low pressure switch is closed, it completes a path from the cycling switch to the PCM on circuit C21. Circuit C21 provides the A/C request signal to cavity C22 of the PCM. Circuit Z1 provides ground for the cycling switch.
After receiving the A/C request signal, the PCM supplies ground for the A/C compressor clutch relay on circuit C13. Circuit C13 connects to cavity C1 of the PCM. Circuit F12 from the fuse 18 in the PDC supplies battery voltage to the coil side of the A/C compressor clutch relay when the ignition switch is in the START or RUN position. When the PCM grounds the relay, the contacts close and connect circuit A17 from fuse 10 in the PDC to circuit C3. Circuit C3 feeds the case grounded A/C compressor clutch.
Also, after receiving the A/C request signal, the PCM supplies ground for the coil side of the radiator fan relay on circuit C27. Circuit C27 connects to cavity C2 of the PCM. Circuit F12 supplies battery voltage to the coil side of the relay when the ignition switch is in the START or RUN position.
When the PCM grounds the coil side of the radiator fan relay, the contacts close and connect circuit F141 from fuse 15 in the PDC to circuit C25. Circuit C25 feeds the radiator fan motor Circuit Z1 provides ground for the motor.