4_FI_System_Diagnosis.pdf

Fl SYSTEM DIAGNOSIS

CONTENTS

PRECAUTIONS IN SERVICING

4- 2

ELECTRICAL PARTS

4- 2

FUSE

4- 3

ECM/VARIOUS SENSORS

4- 3

ELECTRICAL CIRCUIT INSPECTION PROCEDURE

4- 5

USING TESTERS

4- 8

Fl SYSTEM TECHNICAL FEATURES

4- 9

INJECTION TIME (INJECTION VOLUME)

4- 9

COMPENSATION OF INJECTION TIME (VOLUME)

4-10

INJECTION STOP CONTROL

4-10

FI SYSTEM PARTS LOCATION

4-11

FI SYSTEM WIRING DIAGRAM

4-13

SELF-DIAGNOSIS FUNCTION

4-14

USER MODE

4-14

DEALER MODE

4-15

TPS ADJUSTMENT

4-16

FAIL-SAFE FUNCTION

4-17

Fl SYSTEM TROUBLESHOOTING

4-18

CUSTOMER COMPLAINT ANALYSIS

4-18

SELF-DIAGNOSTIC PROCEDURES

4-20

SELF-DIAGNOSIS RESET PROCEDURE

4-20

MALFUNCTION CODE AND DEFECTIVE CONDITION

4-21

"C12" CKP SENSOR CIRCUIT MALFUNCTION

4-23

"C13" lAP SENSOR CIRCUIT MALFUNCTION

4-25

"C14" TP SENSOR CIRCUIT MALFUNCTION

4-28

"C15" ECT SENSOR CIRCUIT MALFUNCTION

4-31

"C21 " IA T SENSOR CIRCUIT MALFUNCTION

4-33

"C23" TO SENSOR CIRCUIT MALFUNCTION

4-35

"C24" or "C25" IGNITION SYSTEM MALFUNCTION

4-36

"C28" STV ACTUATOR CIRCUIT MALFUNCTION

4-37

"C29" STP SENSOR CIRCUIT MALFUNCTION

4-38

"C31 " GEAR POSITION (GP) SWITCH CIRCUIT

MALFUNCTION

4-41

"C32" or "C33" FUEL INJECTOR CIRCUIT MALFUNCTION

4-42

"C41" FP RELAY CIRCUIT MALFUNCTION

4-44

"C42" IG SWITCH CIRCUIT MALFUNCTION

4-44

"C49" PAIR CONTROL SOLENOID VALVE CIRCUIT

MALFUNCTION

4-45

FI SYSTEM DIAGNOSIS 4-1

SENSORS

4-47

CKP SENSOR INSPECTION

4-47

CKP SENSOR REMOVAL AND INSTALLATION

4-47

IAP SENSOR INSPECTION

4-47

IAP SENSOR REMOVAL AND INSTALLATION

4-47

TP SENSOR REMOVAL AND INSTALLATION4-47

TPS ADJUSTMENT

4-47

ECT SENSOR INSPECTION

4-47

ECT SENSOR REMOVAL AND INSTALLATION

4-47

IAT SENSOR INSPECTION

4-48

IAT SENSOR REMOVAL AND INSTALLATION

4-48

TO SENSOR REMOVAL AND INSTALLATION4-48

STP SENSOR INSPECTION

4-48

STP SENSOR REMOVAL AND INSTALLATION

4-48

STP SENSOR ADJUSTMENT

4-48

TP SENSOR INSPECTION

TO SENSOR INSPECTION

4-2 FI SYSTEM DIAGNOSIS

PRECAUTIONS IN SERVICING

When handling the component parts or servicing the FI system,

observe the following points for the safety of the system .

When connecting a connector, be sure to push it in until a

click is felt.

• With a lock type coupler, be sure to release the lock when dis-

connecting, and push it in fully till the works when connecting

it.

•

When disconnecting the coupler, be sure to hold the coupler

body and do not pull the lead wires .

•

Inspect each terminal on the connector/coupler for looseness

or bending .

•

Inspect each terminal for corrosion and contamination.

The terminals must be clean and free of any foreign material

which could impede proper terminal contact .

• Inspect each lead wire circuit for poor connection by shaking it

by hand lightly. If any abnormal condition is found, repair or

replace .

• When taking measurements at electrical connectors using a

tester probe, be sure to insert the probe from the wire harness

side (backside) of the connector/coupler .

ELECTRICAL PARTS

CONNECTOR/COUPLER

•

FI SYSTEM DIAGNOSIS 4-3

• When connecting meter probe from the terminal side of the

coupler (connection from harness side not being possible),

use extra care not to force and cause the male terminal to

bend or the female terminal to open .

Connect the probe as shown to avoid opening of female ter-

minal.

Never push in the probe where male terminal is supposed to

fit.

• Check the male connector for bend and female connector for

excessive opening . Also check the coupler for locking (loose-

ness), corrosion, dust, etc .

FUSE

•

When a fuse blows, always investigate the cause correct it

and then replace the fuse .

•

Do not use a fuse of a different capacity .

•

Do not use wire or any other substitute for the fuse .

ECMNARIOUS SENSORS

• Since each component is a high-precision part, great care

should be taken not to apply any sharp impacts during

removal and installation .

•

Be careful not to touch the electrical terminals of the ECM .

The static electricity from your body may damage this part .

16~ Id

4-4 FI SYSTEM DIAGNOSIS

• When disconnecting and connecting the ECM, make sure to

turn OFF the ignition switch, or electronic parts may get dam-

aged.

•

Battery connection in reverse polarity is strictly prohibited .

Such a wrong connection will damage the components of the

FI system instantly when reverse power is applied .

•

Removing any battery terminal of a running engine is strictly

prohibited.

The moment such removal is made, damaging counter elec-

tromotive force will be applied to the ECM which may result in

serious damage.

• Before measuring voltage at each terminal, check to make

sure that battery voltage is 11 V or higher . Terminal voltage

check at low battery voltage will lead to erroneous diagnosis .

Never connect any tester (voltmeter, ohmmeter, or whatever)

to the ECM when its coupler is disconnected .

Otherwise, damage to ECM may result .

• Never connect an ohmmeter to the ECM with its coupler con-

nected. If attempted, damage to ECM or sensors may result .

• Be sure to use a specified voltmeter/ohmmeter . Otherwise,

accurate measurements may not be obtained and personal

injury may result .

•

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