Ignition System Descriptions
NOTE:
- This information applies to Hermann engine analyzers, tests and connections for Bear DACE engine analyzers are similar, please refer to Instruction manual supplied with EI (distributor-less) test adapters.
- When diagnosing starting or warm up complaints, do not check engine at operating temperature, instead proceed according to specific complaint.
Air intake hose at intake air temperature
sensor (IAT) Remove, reinstall
Ignition coil cover (on top of valve cover) Remove, reinstall
Primary Ignition Side Connections: (HFM/ME)
3 cables from primary side adapter (055/1) to ignition
coils (T1, T2, T3) Connect, disconnect*
Remaining cable from 055/1 to connector T1/X on
the EI adapter (055) Connect, disconnect
Impulse counter scan tool adapter (075) (excluding
model 124) to data link connector (X11/4) Connect, disconnect
Cable from TN connector on EI adapter (055) to X11/4
(socket 10 for model 124, socket 17 for model 202,
socket 13 for models 129/140/210) Connect, disconnect**
* Between primary connections at coil
**For TN signal
Secondary Ignition Side Connections: (HFM)
Red trigger clamp from engine analyzer to metal
handle on adapter (CD1222) and and connector for kV
trigger (061/1) Connect, disconnect
Red trigger clamp from adapter (CD1222) to no. 1
ignition wire Connect, disconnect
Harnesses with kV clamps (nos. 1, 3, 5) to
adapter (CD1222) Connect, disconnect
kV clamps (063/1, 063/3, 063/5) to secondary ignition
wires for cyls. 1, 3, 5 Connect, disconnect
Harnesses with kV clamps (nos. 2, 4, 6) to
adapter (CD1222) Install, remove
kV (coil) pickups (063/2, 063/4, 063/6) on top of
coils for cyls. 2, 4, 6 Connect, disconnect
Power Supply for EI (Distributor-Less) Adapter (055)
Black lead (Sw) to vehicle ground, red lead
to terminal 15 (red) of X11/4 Connect, disconnect
NOTE:
- Ensure that the kV (coil) pickup is properly seated on the ignition coil. Improper readings will be displayed if a large air gap exists between the kV pickup and ignition coil.
- Ensure that the arrow on the inductive kV (coil) pickup points in the direction of the coil output (for May and Christie coils).
NOTE: Due to the differences in the designs of the Bosch, May and Christie ignition coils; different secondary pickups are required.
[1][2]Diagnostic connector (060) from engine analyzer
(030) to 9 pin diagnostic socket on EI (distributor-less)
adapter (055) Connect, disconnect
Vehicle information Input
Engine analyzer (030) and EI
adapter (055) Set to 6 cyl. (see below)
EI (distributor-less)
adapter (055) Set according to table (see below)
NOTE: If the the oscilloscope pattern is upside-down (displays 2 ignition voltage lines at the bottom of the screen) or shows no pattern (with engine running), select a different firing order selection at switch D on the EI (distributor-less) adapter 055 (the base setting is 11; select 12, 13, etc. until correct pattern is displayed).
Connect D.C. inductive (pickup) clamp (065) to
battery ground cable (model 124) or to ground strap
between the transmission and chassis on left side
of vehicle (models 129/140/202/210) Connect, disconnect
Exhaust vent hose (014) Insert, remove
Engine coolant temperature
approx. (80 °C) Engine at operating temperature
Figure 1:
T1/1 Ignition coil 1 (cylinder no.2 and 5)
T1/2 Ignition coil 2 (cylinder no.3 and 4)
T1/3 Ignition coil 3 (cylinder no.1 and 6)
W10 Battery ground
X11/4 Data link connector (DTC readout) 16 or 38 pole
X Ground wire between transmission and chassis
014 Exhaust vent hose
030 Engine analyzer with oscilloscope
055 EI (distributor-less) adapter (CD1222)
055/1 Primary ignition adapter
060 [1][2]Diagnostic connector from engine analyzer
061 Trigger clamp for no. 1 cylinder
061/1 Trigger clamp (from engine analyzer)
061/2 Kilovolt clamp connector plug (with kV clamp removed)
063/1 Kilovolt clamp no. 1 cylinder
063/2 Kilovolt (coil) pickup no. 2 cylinder
063/3 Kilovolt clamp no. 3 cylinder
063/4 Kilovolt (coil) pickup no. 4 cylinder
063/5 Kilovolt clamp no. 5 cylinder
063/6 Kilovolt (coil) pickup no. 6 cylinder
064 Oil temperature sensor
065 D.C. inductive clamp
075 Impulse counter scan tool adapter
Designations on EI (distributor-less) adapter (CD 1222)
A Ignition circuit selection switches
B Diagnostic test selection switches:
S Scope pattern
R Idle quality
K Compression
C Cylinder selection
D Firing order selection
E Scope pattern compensation
(EIN = ON, AUS = OFF)
Figure 2, Primary Ignition Adapter Cable:
A Primary adapter cable
T1 Ignition coil:
a Yellow (female) lead = terminal 15
b Green (female) lead = terminal 1
c to ignition harness
NOTE: The ability to measure secondary ignition voltage is not possible on this coil. Only the primary ignition voltage can be measured using the primary ignition adapter cable A.
Component Locations
Figure 3, Model 202:
Figure 4, Model 124:
Figure 5, Model 129 w/HFM:
Figure 6, Model 140 w/HFM:
Figure 7, Model 140 w/ME:
Figure 8, Model 202:
Figure 9, Model 210:
Overview of the Electronic Ignition (EI) System (Distributor-less) Adapter (CD 1222)
A: Ignition Circuit Selection Switch
T1/1, T1/2, T1/3, T1/4: Primary and Secondary
Superimposed pattern of the individual circuits
Primary Circuit:
T1/1: Single circuit display of ignition circuit T1/1, cyl. 2 and 5.
T1/2: Single circuit display of ignition circuit T1/2, cyl. 3 and 4.
T1/3: Single circuit display of ignition circuit T1/3, cyl. 1 and 6.
T1/4: Not used for engine 104
B. Diagnostic Test Selection Switch
S Scope pattern: For scope pattern display of the primary/secondary and single circuit testing.
R Idle quality: For idle quality tests
K Compression: For dynamic compression test
C Number of cylinders: Set for number of cylinders in engine being tested.
D Firing order: For engine 104 set to no. 11.
E Scope pattern compensation: Compensation is used for better evaluation of the scope pattern by stabilizing the firing-voltage curve. Without compensation the firing-voltage curve is very unstable jumping above and below the oscilloscope zero line.
Test Settings, Engine Analyzer and Electronic Ignition (EI) System (Distributor-less Adapter
Switch A:
Switch B:
Equipment
