STI Home
Diagnostic Manual, Engines, Volume 4

 Printable version
LOCATION:    9.2 ME - SFI (ME2.1)   >  24 Electrical Test Program - Ignition System Test


Electrical Test Program - Ignition System Test

WARNING!
Risk of severe injury when touching ignition parts which produce high voltages. Do not touch ignition components.
Persons with heart pacemakers are not to perform repairs on this type of ignition system.

1. Review WARNING! on pages 11/1 and 11/2,
2. Review 11 , 21 , 22 , 23 , 24 , 31 , 33 ,
3. Review section 0,
4. Connect HHTand readout DTC memory, see 11 ,
5. Ignition: OFF
6. Connect test cable with socket box as per "Connection Diagram - Socket Box", see 22 /5.


Connector with red marking is not required at this time since the engine control module has presently no function installed for it.
When disconnecting the connectors on the engine control module remove center connector (D) first, when reconnecting connectors install center connector (D) last.

Note regarding "Test Connection" column:
The numbers indicated in parentheses, for example, 1.0 (2a) signify:
2 = Socket 2 on wiring diagram.
A = Connector A on wiring diagram

Test scope Test connection
Test condition Nominal value Possible cause/remedy
1.0 P 0 5 6 0
Engine control
module (N3/10)

Voltage supply
circuit 30


3
(3a)
N3/10



12
(4b)
Ignition: ON 11 - 14 V 1.1 - 1.2
1.1   Ground wire

3
(3a)

7
(7A)

112
(8F)

119
(15F)
N3/10







X11/4
2

X11/4
2

X11/4
2

X11/4
2
Ignition: ON 11 - 14 V Wiring,
Model 170 and 202:
Output ground (W16/6),
Right component compartment.
1.2   Voltage supply
circuit 30

X11/4
1
N3/10



12
(4b)
Ignition: ON 11 - 14 V Wiring,
Model 170:
Relay module (K40),
Model 202:
Passenger-side fuse and relay module box (K40/4).
2.0 P 0 5 6 0
Engine control
module (N3/10)

Voltage supply
circuit 87


8
(8a)
N3/10



2
(2a)
Ignition: ON 11 - 14 V 2.1 - 2.2
2.1   Electronics ground

8
(8a)
N3/10




X11/4
2
Ignition: ON 11 - 14 V Wiring,
Model 170 and 202:
Output ground (W16/6),
Right component compartment.
2.2   Voltage supply
circuit 87

X11/4
1
N3/10



2
(2a)
Ignition: ON


Ignition: OFF
11 - 14 V


< 1 V
Wiring,
Model 170:
Relay module (K40).
Model 202:
Passenger-side fuse and relay module box (K40/4).
3.0   Ignition coil (T1/1)
Cylinder 1 and 4
Voltage supply


3
(3a)
N3/10



124
(20F)
Ignition: ON


Starter: Crank
11 - 14 V


> 10 V
Wiring,
Fuses:
Model 170: fuse 11
Model 202: fuse and relay module box fuse 6
Ignition coil (T1/1)
4.0   Ignition coil (T1/2)
Cylinder 2 and 3
Voltage supply


3
(3a)
N3/10



117
(13f)
Ignition: ON


Starter: Crank
11 - 14 V


> 10 V
Wiring,
Fuses:
Model 170: fuse 11
Model 202: fuse and relay module box fuse 6
Ignition coil (T1/2)
5.0 P 0 3 3 5
CKP sensor (L5)
Signal






Voltage


93
(37e)




93
(37e)
N3/10




N3/10



94
(38e)




94
(38e)
Test with oscilloscope.
Starter: Crank
Engine: at Idle



Test with multimeter only
if oscilloscope is
unavailable.
Starter: Crank

Engine: at Idle
Signal, see
Figure 1 and 3.









> 2.5 V~

> 5 V~
Voltage increases with increasing rpm.
5.1 ,
Teeth on starter ring gear.
5.1   Resistance of CKP sensor (L5)

93
(37e)
N3/10



94
(38e)
Ignition: OFF
Unplug connector E on
engine control
module (N3/10).


700 - 1400


(at 20°C):
600 - 1200
Wiring,
L5
6.0 P 0 3 4 1
Camshaft Hall-effect sensor (B6/1)
Hall-effect signal


95
(39e)




96
(40e)
N3/10



N3/10



96
(40e)




2
(2a)
Test with oscilloscope.

Engine: at Idle


Test with multimeter only
if oscilloscope is
unavailable.
Engine: at Idle
Signal: see
Figure 2 and 3








1.2 - 1.7 V
Value changes.
6.1 ,
Wiring
B6/1
6.1   Voltage supply to camshaft Hall-effect sensor (B6/1)
1
B6/1

3

Ignition: ON
Disconnect connector from Hall-effect sensor (B6/1) and test directly on sockets 1 and 3 of connector.
11 - 14 V Wiring.
7.0 P 0 3 0 0
P 0 3 0 1
P 0 3 0 4
Primary voltage
Ignition coil (T1/1),
Cylinders 1 and 4


124
(20F)
N3/10





2
(2a)
Test connection
Individual primary pattern
Range 400 V
Duration 5 milliseconds
Starter: Crank
200 - 350 V 7.1
7.1   Primary winding of T1/1 and T1/2


124
(20F)
N3/10





117
(13f)
Ignition: OFF


0.9 - 1.6
The resistance
of a single coil
at 20°C is
approx. 0.6 .
Wiring
T1/1 or T1/2
8.0 P 0 3 0 0
P 0 3 0 2
P 0 3 0 3
Primary voltage
Ignition coil (T1/2)
Cylinders 2 and 3


117
(13f)
N3/10





2
(2a)
Test connection
Individual primary pattern
Range 400 V
Duration 5 milliseconds

Starter: Crank
200 - 350 V 8.1
8.1   Primary winding of T1/2 and T1/1


117
(13f)
N3/10





124
(20F)
Ignition: OFF

0.9 - 1.6
The resistance
of a single coil
at 20°C is
approx. 0.6 .
Wiring
T1/2 or T1/1
9.0 P 0 3 0 0
P 0 3 0 1
P 0 3 0 2
P 0 3 0 3
P 0 3 0 4
Firing voltage
Ignition coil (T1/1) and (T1/2)
 
Engine analyzer


Test connection
Individual secondary pattern
Range 20 kV
Duration 5 milliseconds
Connect kV pick-ups successively to T1/1 and T1/2.

Starter: Crank
8 - 20 kV 9.1 ,
Spark plugs,
N3/10
9.1   Secondary winding of T1/1 or T1/2


cir. 4a
T1/1
T1/2



cir. 4b
Disconnect both ignition cables on T1/1 or T1/2 6 - 8.5 k T1/1 or T1/2