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Engine Controls - System & Component Testing BMW Z4 E85/E86

Step-by-step instructions on "Engine Controls - System & Component Testing" for BMW Z4 E85/E86 (2002–2005). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

INTRODUCTION

DIGITAL MOTOR ELECTRONICS (DME) CONTROL UNIT

Ground, Power & Input/Output Circuits

SENSORS

COOLANT TEMPERATURE SENSOR

CRANKSHAFT POSITION SENSOR

7-Series

X5 (6-Cylinder) & E46

Z4 & M3

7-Series (V8)

7-Series (V12)

HOT-FILM AIR MASS SENSOR

THROTTLE POSITION SENSOR

RELAYS

FUEL DELIVERY

Fuel Pump Relay

Fuel Pressure Regulator

Fuel Pressure Check (Lack Of Power)

Fuel Pressure Check (Hard Start)

Fuel Pressure & Volume

Preliminary Check

Fuel Injector

Fuel Injector Leakage

Fuel Injector Cleaning

IDLE AIR ACTUATOR VALVE

IGNITION SYSTEM

Ignition System Testing (Siemmens 2003)

Ignition Coil Resistance

Ignition Voltage Too High

Ignition Voltage Too Low

Ignition Coil

Ignition Coil Secondary Signal Check

Fuel Tank Vent (Evaporation) Control Valve

FUEL TANK LEAKAGE

Draining & Filling Fuel Tank

Leak Diagnosis Test - X5

Checking Fuel Tank & Tank Venting System For Leaks With Tank Leakage Diagnosis Module (DM-TL) - Z3

Checking Fuel Tank & Tank Venting System For Leaks With Tank Leakage Diagnosis Module (DM-TL) - Z8

Checking Fuel Tank & Tank Venting System For Leaks With Tank Leakage Diagnosis Module (DM-TL) - 3-Series (E46)

Checking Fuel Tank & Tank Venting System For Leaks With Tank Leakage Diagnosis Module (DM-TL) - 5-Series (E39) 6-Cylinder

Checking Fuel Tank & Tank Venting System For Leaks With Tank Leakage Diagnosis Module (DM-TL) - 5-Series (E39) V8

Conducting Leak Test On Fuel Tank & Tank Ventilation System