Workshop Manuals Factory service & repair Land Rover
01 02 WORKSHOP MANUAL SUPPLEMENT03 04 CONTENTS05 06 CONTENTS07 INFORMATION08 09 INTRODUCTION10 GENERAL SPECIFICATION DATA11 ENGINE TUNING DATA12 GENERAL FITTING REMINDERS13 MAINTENANCE14 ENGINE15 EMISSION CONTROL16 ENGINE MANAGEMENT SYSTEM17 FUEL SYSTEM18 COOLING SYSTEM19 MANIFOLD AND EXHAUST SYSTEM20 CLUTCH21 MANUAL GEARBOX22 TRANSFER GEARBOX23 PROPELLER SHAFTS24 STEERING25 FRONT SUSPENSION26 REAR SUSPENSION27 BRAKES28 CHASSIS AND BODY29 PANEL REPAIRS30 AIR CONDITIONING31 WIPERS AND WASHERS32 ELECTRICAL33 INSTRUMENTS
Land Rover TD5 Defender16 · ENGINE MANAGEMENT SYSTEM
16 · Engine

GLOW PLUGS (page 2 of 2)

Make
Land Rover
Model
Defender TD5 Defender
ENGINE MANAGEMENT SYSTEMGLOW PLUGS · page 2 of 2
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ENGINE MANAGEMENT SYSTEM

25

DESCRIPTION AND OPERATION

Input / Output
The glow plugs receive a feed from the glow plug relay (C0215-3) on a yellow/black then individual black wires.
The ECM provides the earth path for the glow plug relay (C0151-6), working in tandem with the Alarm ECU. The
supply voltage heats the coils to approximately 1000

°

C (1832

°

F). The glow plug circuit is wired in parallel, the

body of each glow plug is screwed directly into the engine block which provides each glow plug with an earth path.
The glow plugs can fail in one or more of the following ways:

•

Heater coil open circuit.

•

Control coil open circuit.

•

Poor earth quality.

•

Short circuit to vehicle supply.

•

Short circuit to vehicle earth.

•

Harness fault.

•

Relay windings open circuit.

•

Incorrect relay fitted.

In the event of a glow plug failure, any of the following symptoms may be observed:

•

Difficult starting.

•

Excessive smoke emissions after engine start.

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