Kia Carens. Manual — part 82

Engine compression pressure : 193 psi (1360
kPa, 13.6 kg/cm²) at 300 rpm
Is engine compression pressure within
specification?

No

Check engine condition.
- Wear of piston, piston ring and cylinder wall
- Defect of cylinder head gasket
- Deformation of cylinder head
- Improper valve clearance
- Valve guide stuck

18

Replace ECM and check for proper operation.
Is system operation correctly?

Yes

Road test and return vehicle tp customer.

No

Replace fuel with another brand.

20

Poor acceleration/Lack of power

Description

· Lack of power on acceleration
· Lack of power at full throttle
· Lower maximum vehicle speed
· Idling speed is normal

(Troubleshooting hint)
1. Factors except engine malfunction
· Clutch slippage
· Brake dragging
· Lack of tire air pressure
· Improper tire size
· Overload
2. Insufficient intake air
· Throttle valve does not open fully
· Intake system clogging
3. Overlean air/fuel ratio
4. Malfunction of ignition
5. Low engine compression pressure

Step

Check

Remedy

1

Check the following factors OK?
- Clutch slippage
- Brake dragging
- Lack of tire air pressure
- Improper tire size
- Overload
Are the items OK?

Yes

Go to next step.

No

Repair as necessary.

2

Is throttle valve open full when fully depressing
accelerator pedal fully?

Yes

Go to step 5.

No

Go to next step.

3

Check correct installation of throttle cable.
Is throttle cable OK?

Yes

Go to next step.

No

Repair or adjust throttle cable.

4

Check correct operation of throttle body.
Is throttle body OK?

Yes

Go to next step.

No

Repair or replace throttle body

5

Check that malfunction indicator light is
illuminated while ignition switch is ON.
Is MIL illuminated longer than 3 seconds after
ignition switch is turned ON?

Yes

Malfunction indicator light is illuminated.
Check for causes. Refer to troubleshooting
with diagnostic trouble codes, page21-18.

No

Go to next step.

6

Check camshaft position sensor and
connector.
Is CMP sensor OK?

Yes

Go to next step.

No

Replace camshaft position sensor or repair
related wire harness.

7

Check throttle position sensor.
Voltage between terminals :

Yes

Go to next step.

Idling condition : 0.4~0.6V
Throttle valve fully open:4.1~4.3V
Is TP sensor OK?

No

Replace throttle position sensor.

8

Check vacuum in intake manifold while engine
is idling.
Vacuum : more than 18.9 inHg (480 mmHg)
Is intake manifold vacuum within specification?

Yes

Go to next step.

No

Check air leakage into intake system and
repair as neessary..

9

Disconnect injector connector one by one
while engine is idling, and check equal engine
speed decrease for each cylinder?

Yes

Go to next step.

No

Check injectors. Refer to fuel system, page
22-20.

10

Check cleanness of air cleaner element.
Is air cleaner element OK?

Yes

Go to next step.

No

Replace air cleaner element.

11

Replace air cleaner element.
Fuel line pressure : 46~51 psi (320~350 kPa,
3.2~3.5 kg/cm²)
Is fuel line pressure within specification?

Yes

Go to next step.

No

High pressure :
Disconnect return line from filter side.
Blow through line towards tank.
If line is clear, try with new pressure regulator.
If line is blocked, check for blockage in return
line and clean or replace as necessary.

Low pressure :
Block return line and check if pressure rises.
If pressure rises, replace pressure regulator.
If pressure does not rise, check fuel filter at
fuel delivery module.
If it is OK, measure fuel pump max.
Pressure and replace as necessary.

12

Does fuel line pressure increase when
accelerating abruptly.
Fuel line pressure : 48 psi (330 kPa, 3.3
kg/cm²)

Yes

Go to next step.

No

Check fuel line and fuel filter clogging and
repair as necessary.

13

Check mass air flow sensor
-Internal resistance, voltage, contamination of
sensor element, ect.
-Measure output voltage
IDLE(800rpm):0.9~1.1V
NO LOAD(3000 rpm): 1.8~2.0V
Is MAF sensor OK?

Yes

Go to next step.

No

Replace mass air flow sensor.

14

Check ignition system.
-Check resistance of DLI coil
Primary : 0.45~0.55Ω
Secondary : 13~15 kΩ
Check wiring harness between DLI coils and
ECM.
Is ignition system OK?

Yes

Go to next step.

No

Replace ignition coils or repair wiring harness.

15

Check spark plug wires.
Are spark plug wires OK?

Yes

Go to next step.

No

Replace spark plug wires.

16

Check spark plug
- Spark plug gap : 0.027~0.031 in (0.7~0.8mm)
- Excessive carbon deposit
- Contact with high tension cord
Are spark plugs OK?

Yes

Go to next step.

No

Clean or replace as necessary.

17

Check engine compression pressure.

Yes

Go to next step.

Engine compression pressure : 193 psi (1360
kPa, 13.6 kg/cm²) at 300 rpm
Is engine compression pressure within
specification?

No

Check engine condition.
- Wear of piston, piston ring and cylinder wall
- Defect of cylinder head gasket
- Deformation of cylinder head
- Improper valve clearance
- Valve guide stuck

18

Replace ECM and check for proper operation.
Is system operating correctly?

Yes

Road test and return vehicle to customer.

No

Replace fuel with another brand.

21

Rough dngine runnin on deceleration / Backfire

Description

· Rough engine running on deceleration and backfire
· Transmission is normal

(Troubleshooting hint)
1. Overrich air/fuel ratio
· Air cleaner element clogged
· Malfunction of fuel injection system(fuel cut control)
· Fuel leakage from injector
· Malfunction of throttle position sensor

Step

Check

Remedy

1

Check that malfunction indicator light is
illuminated while ignition switch is ON.
Is MIL illuminated longer than 3 seconds after
ignition switch is turned ON?

Yes

Malfunction indicator light is illuminated,
Check for causes. Refer to Troubleshooting
with diagnostic trouble codes, page21-18.

No

Go to next step.

2

Check vacuum in intake manifold while engine
is idling.
Vacuum : more than 18.9 mmHg (480 mmHg)
Is intake manifold vacuum within specification?

Yes

Go to next step.

No

Check air leakafe into air intake system.

3

Check cleanness of air cleaner element.
Is air cleaner element OK?

Yes

Go to next step.

No

Replace air cleaner element.

4

Check ECM terminal voltages for B01-14,
B01-41, B01-59, B01-71 and B01-73.
Are terminal voltages OK?

Yes

Go to next step.

No

Check for cause and repair as necessary.

5

Check fuel injection system.(Section 22)
Is fuel injection system OK?

Yes

Go to next step.

No

Check injection system as necessary.

6

Check mass air flow sensor.
-Internal resistance, voltage, contamination of
sensor element, etc.
-Measure output voltage
· IDLE(800rpm):0.9~1.1V
· NO LOAD(3000rpm): 1.8~2.0V
Is MAF sensor OK?

Yes

Go to next step.

No

Replace throttle position sensor.

7

Check throttle position sensor.
- Voltage between terminals
· When idling : 0.3~0.7V
· When opening throttle valve fully : 4.1~4.3V
- Check that idling voltage returns to specified
value when releasing after pulling accelerator
cable.
Is TP sensor OK?

Yes

Go to next step.

No

Replace throttle position sensor.

8

Check throttle body contamination.
Is throttle body contaminated?

Yes

Clean or replace as necessary.

No

Go to next step.

9

Check fuel leakage from injector.
Do fuel injectors leak?

Yes

Clean or replace as necessary.

No

Go to step 10.

10

Replace ECM and check for proper operation.

22

Knocking

Description · Abnormal combustion occurs, accompanied by audible "pinging" noise

(Troubleshooting hint)
1. Improper ignition timing
2. Carbon deposit in cylinder
3. Engine Overheat
4. Overlean air/fuel ratio
· Incorrect fuel injection
· Fuel line pressure decrease on acceleration

Step

Check

Remedy

1

Check that malfunction indicator light is
illuminated while ignition switch is ON.
Is MIL illuminated longer than 3 seconds after
ignition switch is turned ON?

Yes

Malfunction indicator light is illuminated. Check
for causes. Refer to troubleshooting with
diagnostic trouble code,page 21-18.

No

Go to next step.

2

Is throttle valve open fully when depressing
accelerator pedal fully?

Yes

Go to step 5.

No

Go to next step.

3

Check correct installation of throttle cable.
Is throttle cable OK?

Yes

Go to next step.

No

Repair of replace throttle cable.

4

Check correct installation of throttle body.
Is throttle body OK?

Yes

Go to next step.

No

Repair or replace throttle body.

5

Check engine compression pressure
Engine compression pressure : 193 psi (1360
kPa, 13.6 kg/cm²) at 300rpm
Is engine compression pressure within
specification?

Yes

Go to next step.

No

Check engine condition.
- Wear of piston, piston rign and cylinder wall
- Defect of cylinder head gasket
- Deformation of cylinder ead
- Improper valve clearnace
- Valve stuck to guide

6

Check camshaft position sesnor.
Is CMP sensor OK?

Yes

Go to next step.

No

Replace camshaft position sensor or repair
related wire harness.

7

Check fuel line pressure while engine is idling.
Fuel line pressure : 46~51 psi (320~350 kPa,
3.3~3.5 kg/cm²)
Is fuel line pressure within specification?

Yes

Go to next step.

No

High pressure :
Disconnect return line from filter side.
Blow through line towards tank.
If line is clear, try with new pressure regulator.
If line is blocked, check for blockage in return
line and clean or replace as necessary.

Low pressure :
Clamp return line and check if pressure rises.
If pressure rises, replace pressure regulator.
If pressure does not rise, check fuel filter at
fuel delivery module.
If it is OK, measure fuel pump max.
Pressure and replace as necessary

8

Check cooling system.

Yes

Go to nest step.