Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSAAB1993900 L4-2118CC 2.1L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSLOCATIONSEZK IGNITION SYSTEM
1993 Saab 900 L4-2118cc 2.1L DOHC
EZK Ignition System
1993 Saab 900 L4-2118cc 2.1L DOHCSECTION EZK Ignition System
Locations of components


1 Battery on the right-hand side of the engine compartment
4 Starter motor on the left-hand side of the engine (intake side)
5 Ignition coil on the cross-member, above the radiator
6 Ignition distributor at the front of the engine
20 Ignition switch on the centre console between the front seats
22A Fuse holder in the electrical distribution box, in the engine compartment, on the left-hand wheel housing
47 Combined instrument on the fascia
47P CHECK ENGINE warning lamp in combined instrument 47 on the fascia
73 Timing service instrument socket in the electrical distribution box, in the engine compartment, on the left-hand wheel housing
75 Distribution block in the engine compartment, on the right- hand side
110 Tachometer in combined instrument 47 on the fascia
145 Test tapping, EZK in the engine compartment, on the left-hand wheel housing, forward of the electrical distribution box
146 Amplifier for the electronic ignition system in the engine compartment, on the left-hand wheel housing
157 Spark plug on the engine
176 Control unit for the EZK ignition system in the engine compartment, forward of the left-hand wheel housing
178 Knock sensor for the EZK system on the engine, between the two centre intake ports
200 Control unit for the LH fuel injection system forward of the right-hand front door, below the fascia (behind the trim)
203 Throttle angle transmitter - LH fuel injection system on the engine throttle housing
204 Test connector - LH fuel injection system (116)
(H3-6) in the engine compartment, behind the right-hand wheel housing
345 Crankshaft sensor behind the crankshaft pulley
G1 Earthing point on the radiator cross-member
G6 Negative distribution terminal in the electrical distribution box, in the engine compartment, on the left-hand wheel housing
G7 Earthing point on the engine at the engine lifting lug
G8 Earthing point on the fascia
G12 Earthing point for the amplifier, on the left-hand wheel housing
G25 Earthing point on the gearbox
3-pole connectors
H3-3 to the left of the starter motor
H3-5 in the engine compartment, on the right- hand side, at the air intake
4-pole connectors
H4-1 in the engine compartment, on the left-hand wheel housing, forward of the electrical distribution box (EZK test tapping)
H4-7 at control unit 200, forward of the right- hand front door, under the fascia (behind the trim)
6-pole connectors
H6-1 in the engine compartment, on the right-hand side, at the air intake
H6-2 in the engine compartment, on the right-hand side, at the air intake
H29-1 29-pole white connector
H29-2 29-pole red connector
H33-1 33-pole black connector
H33-2 33-pole grey connector
in the electrical distribution box in the engine compartment, on the left-hand wheel housing. The connectors are accessible from the interior
1 Battery on the right-hand side of the engine compartment
4 Starter motor on the left-hand side of the engine (intake side)
5 Ignition coil on the cross-member, above the radiator
6 Ignition distributor at the front of the engine
20 Ignition switch on the centre console between the front seats
22A Fuse holder in the electrical distribution box, in the engine compartment, on the left-hand wheel housing
47 Combined instrument on the fascia
47P CHECK ENGINE warning lamp in combined instrument 47 on the fascia
73 Timing service instrument socket in the electrical distribution box, in the engine compartment, on the left-hand wheel housing
75 Distribution block in the engine compartment, on the right- hand side
110 Tachometer in combined instrument 47 on the fascia
145 Test tapping, EZK in the engine compartment, on the left-hand wheel housing, forward of the electrical distribution box
146 Amplifier for the electronic ignition system in the engine compartment, on the left-hand wheel housing
157 Spark plug on the engine
176 Control unit for the EZK ignition system in the engine compartment, forward of the left-hand wheel housing
178 Knock sensor for the EZK system on the engine, between the two centre intake ports
200 Control unit for the LH fuel injection system forward of the right-hand front door, below the fascia (behind the trim)
203 Throttle angle transmitter - LH fuel injection system on the engine throttle housing
204 Test connector - LH fuel injection system (116)
(H3-6) in the engine compartment, behind the right-hand wheel housing
345 Crankshaft sensor behind the crankshaft pulley
G1 Earthing point on the radiator cross-member
G6 Negative distribution terminal in the electrical distribution box, in the engine compartment, on the left-hand wheel housing
G7 Earthing point on the engine at the engine lifting lug
G8 Earthing point on the fascia
G12 Earthing point for the amplifier, on the left-hand wheel housing
G25 Earthing point on the gearbox
3-pole connectors
H3-3 to the left of the starter motor
H3-5 in the engine compartment, on the right- hand side, at the air intake
4-pole connectors
H4-1 in the engine compartment, on the left-hand wheel housing, forward of the electrical distribution box (EZK test tapping)
H4-7 at control unit 200, forward of the right- hand front door, under the fascia (behind the trim)
6-pole connectors
H6-1 in the engine compartment, on the right-hand side, at the air intake
H6-2 in the engine compartment, on the right-hand side, at the air intake
H29-1 29-pole white connector
H29-2 29-pole red connector
H33-1 33-pole black connector
H33-2 33-pole grey connector
in the electrical distribution box in the engine compartment, on the left-hand wheel housing. The connectors are accessible from the interior
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.