Daewoo Matiz (2003 year). Manual - part 34

 

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Daewoo Matiz (2003 year). Manual - part 34

 

 

1F – 46  ENGINE CONTROLS

Ignition System Check (Cont’d)

Step

Action

Value(s)

Yes

No

9

Check for an open in the wire from EI system
ignition coil connector terminal 2 to the Engine
Control Module (ECM) connector terminal 1.
Is the problem found?

–

Go to Step 7

Go to Step 11

10

1. Replace the EI system ignition coil.
2. Connect the EI system 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?

–

System OK

–

11

1. Replace the ECM.
2. Connect the EI system 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?

–

System OK

–

12

1. Turn the ignition OFF.
2. Disconnect the crankshaft position (CKP) sensor

connector.

3. Measure the resistance between the CKP sensor

terminals 1 and 2.

Is the resistance within the value specified?
4. Measure the resistance between following

terminals.

D

Terminals 1 and 3 of CKP sensor.

D

Terminals 2 and 3 of CKP sensor.

Is the resistance within the value specified?

400–600 

Ω

∞

Go to Step 14

Go to Step 13

13

Replace the crankshaft position sensor.
Is the repair complete?

–

System OK

–

14

1. Turn the ignition ON.
2. Measure the voltage between the CKP sensor

connector terminals 1 and 3.

Is the voltage within the value specified?

0.95–1.10 V

Go to Step 20

Go to Step 15

15

Measure the voltage between the CKP sensor
connector terminal 1 and ground.
Is the voltage within the value specified?

0.95–1.10 V

Go to Step 18

Go to Step 16

16

Check the wire between the CKP sensor connector
terminal 1 and the ECM connector terminal 54 for an
open or short.
Is the problem found?

–

Go to Step 17

Go to Step 10

17

Repair the wire between the CKP sensor connector
terminal 1 and the ECM connector terminal 54.
Is the repair complete?

–

System OK

–

18

Check the wire between the CKP sensor connector
terminal 3 and ground for an open or short.
Is the problem found?

–

Go to Step 19

Go to Step 11

19

Repair the wire between the CKP sensor connector
terminal 3 and ground.
Is the repair complete?

–

System OK

–

20

1. Turn the ignition ON.
2. Measure the voltage between the CKP sensor

connector terminals 2 and 3.

Is the voltage within the value specified?

0.95–1.10 V

Go to Step 24

Go to Step 21

ENGINE CONTROLS  1F – 47

Ignition System Check (Cont’d)

Step

Action

Value(s)

Yes

No

21

Measure the voltage between the CKP sensor
connector terminal 2 and ground.
Is the voltage within the value specified?

0.95–1.10 V

Go to Step 18

Go to Step 22

22

Check the wire between the CKP sensor connector
terminal 2 and the ECM connector terminal 24 for an
open or short.
Is the problem found?

–

Go to Step 23

Go to Step 11

23

Repair the wire between the CKP sensor connector
terminal 2 and the ECM connector terminal 24.
Is the repair complete?

–

System OK

–

24

1. Turn the ignition OFF.
2. Connect a test light between the EI system

ignition coil connector terminal 2 and ground.

3. Turn the ignition ON.
Is the test light on?

–

Go to Step 27

Go to Step 25

25

Check for an open in the wiring between the EI
system ignition coil connector, terminal 1 and the
main relay connector terminal 87.
Is the problem found?

–

Go to Step 26

Go to “Main

Relay Circuit

Check”

26

Repair the open in the wiring between the EI system
ignition coil connector terminal 1 and the main relay
connector terminal 87.
Is the repair complete?

–

System OK

–

27

Check for a damage in the terminal of the EI system
ignition coil connector and repair as needed.
Is the repair complete?

–

System OK

–

1F – 48  ENGINE CONTROLS

MAA1F090

ENGINE COOLING FAN CIRCUIT CHECK

Circuit Description

The engine cooling fan circuit operates the cooling fan.
The cooling fan is controlled by the engine control mod-
ule (ECM) based on input from the coolant temperature
sensor (CTS) and the A/C ON/OFF. The ECM controls
the low speed cooling fan operation by internally ground-
ing the ECM connector terminal 39. This energizes the
low speed cooling fan relay and operates the cooling fan
at low speed. The low speed cooling fan operation is
achieved by the cooling fan resistor causing a drop in
the voltage supplied to the cooling fan. The ECM con-
trols the high speed cooling fan operation by internally
grounding the ECM connector terminal 5. This ener-
gizes the high speed cooling fan relay, bypassing the ra-
diator fan resistor. This results in high speed cooling fan
operation.

Diagnostic Aids

D

If the owner complained of an overheating problem, it
must be determined if the complaint was due to an

actual boil over, or the engine coolant temperature
gauge indicated overheating. If the engine is over-
heating and the cooling fans are on, the cooling sys-
tem should be checked.

D

If the engine fuse block fuse EF15 become open
(blown) immediately after installation, inspect for a
short to ground in the wiring of the appropriate circuit.
If the fuse become open (blown) when the cooling
fans are to be turned on by the Engine Control Mod-
ule (ECM), suspect a faulty cooling fan motor.

D

The ECM will turn the cooling fan on at low speed
when the coolant temperature is 93

_

C (199

_

F). The

ECM will turn the cooling fans off when the coolant
temperature is 90

_

C (194

_

F).

D

The ECM will turn the cooling fans on at high speed
when the coolant temperature is 100

_

C (212

_

F). The

ECM will change the cooling fans from high speed to
low speed when the coolant temperature is 97

_

C

(207

_

F).

ENGINE CONTROLS  1F – 49

Engine Cooling Fan Circuit Check

Step

Action

Value(s)

Yes

No

1

Perform an Euro On-Board Diagnostic (EOBD)
System Check.
Was the check performed?

–

Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check.

2

1. Check the fuses EF3 and EF10 in engine fuse

block.

2. Replace the fuse(s) as needed.
Is the fuse(s) OK?

–

Go to Step 3

Go to

“Diagnostic

Aids”

3

1. Turn the ignition OFF.
2. Turn the A/C switch OFF. If equipped.
3. Connect a scan tool to the Data Link Connector

(DLC).

4. Start the engine.
5. The main cooling fan should run at low speed

when the coolant temperature reaches 96

_

C

(205

_

F).

Does the cooling fan run at low speed?

–

Go to Step 4

Go to Step 8

4

The cooling fans should run at high speed when the
coolant temperature reaches 100

_

C (212

_

F).

Do the cooling fans run at high speed?

–

Go to Step 5

Go to Step 19

5

1. Turn the ignition OFF.
2. Start the engine.
3. Turn the A/C switch ON.
Does the cooling fan runs at low speed?

–

Go to Step 7

Go to Step 6

6

1. Diagnose the A/C compressor clutch circuit.
2. Repair the A/C compressor clutch circuit as

needed.

Is the repair complete?

–

System OK

–

7

1. Turn the ignition OFF.
2. Start the engine.
3. Turn the A/C switch ON and raise the rpm.
4. The cooling fan should run at high speed when

the high side A/C pressure reaches 2068 kPa
(300 psi).

Do the cooling fans run at high speed?

–

System OK

–

8

1. Turn the ignition OFF.
2. Disconnect the cooling fan connector.
3. Turn the ignition ON.
4. Connect a test light between terminal 1 of cooling

fan connector and ground.

Is the test light on?

–

Go to Step 9

Go to Step 12

9

Connect a test light between terminal 2 of cooling
fan connector and battery positive.
Is the test light on?

–

Go to Step 11

Go to Step 10

10

Repair open circuit between terminal 2 of cooling fan
connector and ground.
Is the repair complete?

–

System OK

–

11

Check for a damaged terminals in main cooling fan
connector and repair it or replace the main cooling
fan.
Is the repair complete?

–

System OK

–

 

 

 

 

 

 

 

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