SsangYong Musso. Manual - part 119

1F-60  ENGINE CONTROLS

SSANGYONG  Y158

Circuit Description

The Electronic Ignition (EI) system uses a waste spark
method of spark distribution. The Crankshaft Position
(CKP) sensor sends reference pulses to the Engine
Control Module (ECM). The ECM then triggers the EI
system ignition coils Once the ECM triggers the EI sys-
tem ignition coils both of the connected spark plugs fire
at the same time. One cylinder is on its compression
stroke at the same time that the other is on the exhaust
stroke, resulting in lower energy needed to fire the spark
plug in the cylinder on its exhaust stroke.

This leaves the remainder of the high voltage to be used
to fire the spark plug in the cylinder on its compression
stroke. Since the CKP sensor is in a fixed position, tim-
ing adjustments are not possible or needed.

Test Description

The number(s) below refer to specific step(s) on the
diagnostic table.

IGNITION SYSTEM CHECK (3.2L DOHC)

2. It is important to check for the presence of spark to

all of the cylinders to isolate the problem to either
EI system ignition coil inputs or output.

5. In checking the ECM outputs for the electronic  park

timing signal, it recommended to use an oscillo-
scope to view the varying voltage signals. In mea-
suring these outputs with a voltmeter, intermittent
errors may occur that cannot be seen by a voltme-
ter.

7. After confirming ECM inputs for the electronic spark

timing to the EI system coil are OK, it can be deter-
mined that a faulty EI system ignition coil is at fault.

13. After confirming proper CKP sensor input to the ECM

and no wiring problems present, it can be de-
termined that the ECM is at fault.

22. If the wiring between the ignition coil and the Over

Voltage Protection Relay (OVPR) connector termi-
nal 8 is OK, the problem is in the OVPR circuit.

YAA1F230

ENGINE CONTROLS  1F-61

SSANGYONG  Y158

1

1. Remove the spark plugs.
2. Inspect the spark plug for wet, cracks, wear,

improper gap, burned electrodes, or heavy deposits.

3. Replace the spark plugs as needed.
Is the repair complete?
Check for the presence of spark from all of the ignition
wires while cranking the engine.
Is spark present from all of the ignition wires?
1. Measure the resistance of the ignition wires.
2. Replace any ignition wire(s) with a resistance above

the value specified.

3. Check for the presence of spark from all of the

ignition wires.

Is spark present from all of the ignition wires?
Is spark present from at least one of the ignition
wires, but not all of the ignition wires?
1. Turn the ignition OFF.
2. Disconnect the Electronic Ignition (EI) system

ignition coil connectors.

3. While cranking the engine, measure the voltage at

the ignition coil No. 1 connector terminal 2.

Does the voltage fluctuate within the values specified?
While cranking the engine, measure the voltage at the
ignition coil No. 2 connector terminal 2.
Does the voltage fluctuate within the values specified?
While cranking the engine, measure the voltage at the
ignition coil No. 3 connector terminal 2.
Does the voltage fluctuate within the values specified?
Check for an open in the wire from the ignition coil No. 3
connector terminal 2 to the Engine Control Module
(ECM) connector terminal 70.
Is the problem found?
Check for an open in the wire from the ignition coil No. 2
connector terminal 2 to the ECM connector terminal 72.
Is the problem found?
Check for an open in the wire from the ignition coil No. 1
connector terminal 2 to the ECM connector terminal 71.
Is the problem found?
1. Repair the wiring as needed.
2. Connect the ignition coil connector.
3. Check for the presence of spark from all of the

ignition wires.

Is spark present from all of the ignition wires?

Step

Action

Value(s)

Yes

No

Ignition System Check (3.2L DOHC)

Caution: Use only electrically insulated pliers when handling ignition wires with the engine running to pre-
vent an electrical shock.

2

3

-

System OK

 Go to Step 2

1.8 - 2.2 k

Ω

System OK

 Go to Step 4

5

6

-

System OK

 Go to Step 3

4

7

-

 Go to Step 11

 Go to Step 13

8

-

 Go to Step 5

 Go to Step 14

0.04 - 2.0 v

 Go to Step 6

 Go to Step 10

9

-

System OK

-

10

0.04 - 2.0 v

 Go to Step 7

 Go to Step 9

0.04 - 2.0 v

 Go to Step 12

 Go to Step 8

-

 Go to Step 11

 Go to Step 13

-

 Go to Step 11

 Go to Step 13

11

1F-62  ENGINE CONTROLS

SSANGYONG  Y158

21

-

 Go to Step 5

 Go to Step 22

12

1. Replace the ignition coil that the spark is not

present.

2. Connect the ignition coil connector.
3. Check for the presence of spark from all of the

ignition wires.

Is spark present from all of the ignition wires?
1. Replace the ECM.
2. Connect the ignition coil connector.
3. Check for the presence of spark from all of the

ignition wires.

Is spark present from all of the ignition wires?
1. Turn the ignition OFF.
2. Disconnect the Crankshaft Position (CKP) sensor

connector.

3. Measure the resistance between the CKP sensor

terminal 1 and 2.

Is the resistance within the value specified?
1. Turn the ignition ON.
2. Measure the voltage between the CKP sensor

connector terminal 2 and 1.

Is the voltage near the value specified?
Measure the voltage between the CKP sensor connector
terminal 2 and ground.
Is the voltage near the value specified?
1. Turn the ignition OFF.
2. Check the wire between the CKP sensor connector

terminal 1 and ECM connector terminal 100 for an
open or short.

Is the problem found?
1. Turn the ignition OFF.
2. Check the wire between the CKP sensor connector

terminal 2 and ECM connector terminal 99 for an
open or short.

Is the problem found?
Repair the wire between the CKP sensor connector
terminal 2 and ECM connector terminal 99.
Is the repair complete?
Repair the wire between the CKP sensor connector
terminal 1 and ECM connector terminal 100.
Is the repair complete
1. Turn the ignition OFF.
2. Connect a test light between ignition coil No. 1

terminal 1 and ground.

3. Turn the ignition ON and check the test light.
4. Repeat the above procedure on ignition coil No. 2

and No 3.

Is the test light on all ignition coils?

Step

Action

Value(s)

Yes

No

Ignition System Check (3.2L DOHC) (Cont’d)

13

14

-

System OK

-

-

System OK

-

1,090 ± 164 

Ω

 Go to Step 15

 Go to Step 24

0 v

 Go to Step 21

 Go to Step 16

0 v

 Go to Step 17

 Go to Step 18

-

 Go to Step 20

 Go to Step 13

-

 Go to Step 19

 Go to Step 13

-

System OK

-

15

16

17

18

19

20

-

System OK

-

ENGINE CONTROLS  1F-63

SSANGYONG  Y158

Check for an open in the wiring between the ignition
coils connector terminal 1 and the Over Voltage
Protection Relay (OVPR) connector terminal 8.
Is the problem found?
Repair the open wiring between the ignition coils
connector terminal 1 and the OVPR connector terminal
8.
Is the repair complete?
Replace the CKP sensor.
Is the repair complete?

Step

Action

Value(s)

Yes

No

Ignition System Check (3.2L DOHC) (Cont’d)

22

-

System OK

-

-

System OK

-

23

24

-

 Go to Step 23

Go to “OVPR

Circuit Check”