1986 Mercedes Benz 560SL (107.048) V8-5.6L …...1986 Mercedes Benz 560SL (107.048) V8-5.6L...

1986 Mercedes Benz 560SL (107.048) V8-5.6L (117.967)

Vehicle » Powertrain Management » Computers and Control Systems » Testing and Inspection » Component

Tests and General Diagnostics » Component Tests » Ignition System Test

Test Data

Voltages

Resistances (test data valid from 0C to 100C)

Dwell Angle

• at cranking rpm -- 1-40% or 1-18°

• at 3,500 rpm -- 60-90% or 27-40°

Ignition Timing (firing point)

Spark Plugs

of 15ALLDATA Repair - 1986 Mercedes Benz 560SL (107.048) V8-5.6L (117.967) - Ignition ...

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Equipment

• Multimeter -- SUN DMM-5

• Engine tester -- SUN EMT-1019, Master 3, MCM 2110

• Tachometer -- All-Test 3610-MB

Wiring Diagram For Electronic Ignition System

B11/2 Coolant temperature sensor



L5 Position sensor (via flexplate segments)

N1/2 Ignition control module

R16/1 Reference input resistor (EZL)

S5/3 High voltage distributor

S29/2 Throttle valve switch

T1 Ignition coil

W3 Ground, front left wheel housing (ignition coil)

W11 Ground, engine (wire connection)

X11 Diagnostic socket/terminal TO

a To CIS-E control unit, socket 5

b To engine idle speed control unit, socket 4

c To CIS-E control unit, socket 21

e To plug connection X 26 on engine, socket 3 (circuit 30)

f To plug connection X 26 on engine, socket 1 (circuit 15)

g Not used - ends in wiring harness

NOTE: The ignition system test procedure is divided into two sections:

1. Engine Not Running

The voltage supply, the position indicator, the ignition coil and several functions of ignition control module are

tested.

2. Engine Running

The basic functions of the ignition system are in order, but a fault in ignition adjustment is suspected. The

faults may be caused by the coolant temperature sensor or by the ignition control module itself. They cannot

be evaluated using driving performance since this type of ignition control influences only the emission

characteristics and the fuel consumption data.

1. Engine Not Running

Test Page 1



Fig. 1



Test Page 2



Fig. 2

Fig. 3



Test Page 3

Fig. 4

2. Engine Running

Test Page 1



Fig. 5



Fig. 6

S29/2 Throttle valve switch (idle/full load contact)

X56 Throttle valve switch plug connection

1 Idle contact

2 Common

3 Full load contact

Test Page 2

of 15ALLDATA Repair - 1986 Mercedes Benz 560SL (107.048) V8-5.6L (117.967) - Igniti...


Fig. 7



Fig. 8

Fig. 9



Test Page 3



Fig. 10



Fig. 11



1986 Mercedes Benz 560SL (107.048) V8-5.6L …...1986 Mercedes Benz 560SL (107.048) V8-5.6L...

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