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BMW
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1989
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525i Automatic
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Repair and Diagnosis
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Engine Performance
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System
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System/Component Tests
System/Component Tests
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Introduction
Notes
MOTRONIC Control Unit (MCU)
Power Circuits
Ground Circuits
MCU Location
Engine Sensors & Switches
A/C Switch
Airflow Meter
Air Temperature Sensor
Coolant Temperature Sensor
Cylinder Identification Sensor
Cranking Signal
Engine Speed/Reference Point Sensor
Idle Switch
Oxygen (O2) Sensor
Throttle Position Switch
Transmission Range Selector (A/T Only)
Vehicle Speed Sensor
Wide Open Throttle Switch
Relays & Solenoids
Relays
Fuel Pump Relay
Main Relay (Battery)
O2 Sensor Heater Relay
Canister Purge Solenoid
Idle Speed Actuator
Fuel System
Fuel Delivery
Fuel Control
Fuel Injector
Idle Control System
Notes
Idle Speed ACUTATOR
Ignition System
Emission System & Sub-System
Fuel Evaporation
Purge Valve Solenoid
Miscellaneous Controls
Notes
Transmission
Torque Converter Clutch