Ignition System Test

Test data

Voltage:

Resistances:

NOTE: Resistance test data valid from 0°C to 100°C

Dwell angle
at cranking rpm -- 10-54% or 9-49°
at 3,200 rpm -- 30-60% or 27-54°

Ignition timing (firing point)
at cranking rpm -- TDC ± 2°
at idle with vacuum -- 8-12°
at 3,200 rpm without vacuum -- 25-29°
at 3,200 rpm with vacuum -- 39-43°

Spark plugs (with conical seat)
BERU
Designation -- 14K-8DU
Electrode gap -- 0.8 mm
Part number -- 102 159 06 03

BOSCH
Designation -- H8DC
Electrode gap -- 0.8 mm
Part number -- 102 159 06 03

CHAMPION
Designation -- S9YC
Electrode gap -- 0.8 mm
Part number -- 102 159 06 03

Equipment
^ Digital multimeter - SUN DMM-5, Fluke model 23
- Available through the MBNA Standard Equipment Program

^ Digital tester - SUN EMT-1019/Master 3, MCM- 2110, MEA -1500 MB,
- Bear D.A.C.E. model 40-960, All-Test 3610-MB (for rpm readings only)

Wiring diagram, EZL:

B11/2 Coolant temperature sensor (EZL/CIS-E)
L5 Crankshaft position sensor
N1/2 Electronic ignition control unit (EZL)
R16/1 Reference resistor (EZL)
S5/3 High voltage distributor
S29/2 Throttle valve switch full load/idle
T1 Ignition coil
W3 Ground, left front wheel housing (ignition coil)
W11 Ground, engine (connection point for ground wires)
X11 Diagnostic socket/terminal block (circuit TD)
Z Connector sleeve (solder joint in harness)

a to CIS-E control unit plug (terminal 5)
b to electrical center, connector S, terminal 11 (circuit 30)
c to electrical center, connector S, terminal 4 (circuit 15)
d to CIS-E control unit (terminal 13)
e to CIS-E control unit (terminal 21)
f without function, wire ends in harness

br brown
ge yellow
gn green
rt red
sw black

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 unit 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

Y�Test Procedure:

Fig. 1:

Fig. 2:

Fig. 3:

Fig. 4:

2. Engine running

r���Test Procedure:

Fig. 1:

Fig. 2:

S29/2 Throttle valve switch, full load/idle
S29/2x1 Connector, throttle valve switch
1 Idle contact
2 Common
3 Full load contact

Color code
bl blue
br brown
gn green

Fig. 3:

Fig. 4:

Fig. 5:

Fig. 6:

Fig. 7: