Specifications
| Item | Nm |
|---|---|
| Climate control module and audio/cd module assembly to instrument panel - bolt | 3 |
| Climate control and audio/cd modules to assembly bracket - bolt | 3 |
| Climate control and audio/cd modules to assembly bracket - screw | 2.5 |
Torque Specifications
Scheme 2
| Item Number | Description |
|---|---|
| 1 | Pollution sensor (if fitted) |
| 2 | Refrigerant pressure sensor |
| 3 | Sunload/Light sensor |
| 4 | Windshield distribution (defrost) stepper motor |
| 5 | Right-Hand (RH) temperature blend stepper motor |
| 6 | Cabin humidity and temperature sensor |
| 7 | Evaporator temperature sensor |
| 8 | Control switches |
| 9 | Left-Hand (LH) temperature blend stepper motor |
| 10 | Face/feet distribution stepper motor |
| 11 | Blower motor control module |
| 12 | Blower motor |
| 13 | Automatic Temperature Control (ATC) module |
| 14 | Ambient air temperature sensor |
| 15 | Air intake servo motor |
| 16 | Air Conditioning (A/C) compressor solenoid valve |
A/C Compressor Torque
The automatic temperature control (ATC) module transmits refrigerant pressure and air conditioning (A/C) compressor current values to the engine control module (ECM) over the medium speed then high speed controller area network (CAN) bus, using the instrument cluster as a gateway. The engine control module (ECM) uses these values to calculate the torque being used to drive the air conditioning (A/C) compressor. The engine control module (ECM) compares the calculated value with its allowable value and if necessary forces the automatic temperature control (ATC) module to inhibit the air conditioning (A/C) compressor by transmitting the 'AC Clutch Inhibit' controller area network (CAN) message. This forces the automatic temperature control (ATC) module to reduce the drive current to the air conditioning (A/C) compressor solenoid valve, which reduces refrigerant flow. This in turn reduces the torque required to drive the air conditioning (A/C) compressor.
By reducing the maximum air conditioning (A/C) compressor torque, the engine control module (ECM) is able to reduce the load on the engine when it needs to maintain vehicle performance or cooling system integrity.