BMW E46 User Manual

Initial Print Date:10/30/00 Revision Date:12/05/00
Subject Page
E46 IHKA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fresh Air Micro Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Temperature Regulation - Heating. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Temperature Regulation - Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Compressor Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Stepper Motor M-Bus Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Convertible Rear Window Defroster. . . . . . . . . . . . . . . . . . . . . . . . . . 10
IHKA Personalization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
System Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Diagnosis and Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
E46 IHKA I.P.O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Solar Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Purpose of the System.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Solar Radiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Solar Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
System Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Table of Contents
E46 CLIMATE CONTROL

BMW E46 Specifications

General

Brand	BMW
Model	E46
Category	Temperature Controller
Language	English

Summary

E46 IHKA Climate Control

Control Panel and Filter

Details the IHKA control panel functions and fresh air micro filter location/servicing.

Temperature Regulation and Compressor

Explains heating/cooling regulation, water valve, and A/C compressor control.

System Operation and Features

Covers stepper motor control, defroster, personalization, and general operation.

Diagnosis and IPO

Outlines troubleshooting, diagnosis, and system input/output overview.

Solar Sensor System

Purpose, Inputs, and Radiation Effects

Compensates climate control for sun's heating effect and explains radiation influence on settings.

Components and Diagnosis

Describes physical components and diagnostic methods for the solar sensor.

Control Curves Operation

Blower and Flap Adjustments

Illustrates solar influence on blower fan speed and flap positions.

Sensor Diagnosis and Hints

Outlines solar sensor diagnosis procedures and workshop hints for removal.

E46 IHKR System

Purpose, Components, and Operation

Details the system's purpose, components, and operational principles.

Key System Functions

Covers A/C control, air intake, and rear window defroster functions.

Diagnosis, Coding, and Memory

Outlines diagnosis, coding, and Car/Key Memory features for the IHKR system.