Nissan Terrano model r20 series 2004. Manual - part 163

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage and

Pulse Signal)

426

B

Accelerator position switch
(Idle) ground

[Ignition switch “ON”]

Approximately 0V

433

R/W

Accelerator position sen-
sor power supply

[Ignition switch “ON”]

Approximately 5V

434

G

Accelerator position sen-
sor

[Ignition switch “ON”]

I

Accelerator pedal fully released

0.30 - 0.50V

[Ignition switch “ON”]

I

Accelerator pedal fully depressed

3.0 - 4.3V

435

L/Y

Accelerator position switch
(Idle)

[Ignition switch “ON”]

I

Accelerator pedal fully released

Approximately 0V

[Ignition switch “ON”]

I

Accelerator pedal depressed

BATTERY VOLTAGE
(11 - 14V)

439

L/B

Tachometer

[Engine is running]

I

Warm-up condition

I

Idle speed

Approximately 3.0V

SEF325Y

[Engine is running]

I

Warm-up condition

I

Engine speed is 2,000 rpm

Approximately 3.0V

SEF326Y

507

B/W

Ignition switch

[Ignition switch “OFF”]

0V

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

TROUBLE DIAGNOSES

TD27Ti

ECM Terminals and Reference Value (Cont’d)

EC-374

Wiring Diagram

YEC672A

TROUBLE DIAGNOSIS FOR POWER SUPPLY

TD27Ti

EC-375

Diagnostic Procedure

INSPECTION START

Start engine.
Is engine running?

Yes

E

No

CHECK POWER SUPPLY-I.
1. Turn ignition switch to “ON” posi-

tion.

2. Check voltage between ECM

connector terminal

507

and

engine ground with
CONSULT-II or voltage tester.
Voltage: Battery voltage

If NG, check the following:

I

10A fuse

I

Harness for open or short-circuit
between ECM and ignition switch

If NG, replace 10A fuse or repair
harness or connectors.

OK

Go to

q

B

“CHECK GROUND CIR-

CUIT”.

CHECK POWER SUPPLY-II.
1. Stop engine.
2. Check voltage between ECM

connector terminal

325

and

engine ground with CON-
SULT-II or voltage tester.
Voltage: Battery voltage

OK

E

NG

Check the following:

I

ECM relay

I

20A fuse

I

Harness for open or short-circuit
between ECM and battery

I

Harness connectors M787, F66
(LHD models)

I

Battery connection and charge

If NG, replace fuse or charge bat-
tery or repair harness or connec-
tors.

q

A

NEF642

YEC283A

MEC946D

MEC943D

H

H

H

H

TROUBLE DIAGNOSIS FOR POWER SUPPLY

TD27Ti

EC-376

q

A

CHECK POWER SUPPLY-III.
1. Turn ignition switch to “ON” position

and then to “LOCK” position.

2. Check voltage between ECM connector

terminals

107

,

108

,

109

and engine

ground with CONSULT-II or tester.
Voltage:

After turning ignition switch to
“LOCK” position, battery voltage
will exist for a few seconds, then
drop to approximately 0V.

NG

E

OK

Go to

q

B

“CHECK

GROUND CIRCUIT”.

Case-1: Battery voltage does

not exist.

Case-2: Battery voltage exists

for more than a few
seconds.

Case-1

Case-2

E

Go to

“CHECK ECM

RELAY”.

CHECK HARNESS CONTINUITY
BETWEEN ECM RELAY AND ECM.
1. Disconnect ECM harness connector.
2. Disconnect ECM relay harness connec-

tor.

3. Check harness continuity between

ECM connector terminals

325

and

ECM relay connector terminal

q

2

, and

ECM connector terminals

107

,

108

,

109

and ECM relay connector termi-

nal

q

5

. Refer to wiring diagram.

Continuity should exist.
If OK, check harness for short-circuit.

OK

E

NG

Check the following:

I

Harness connectors

M787

,

F66

(LHD mod-

els)

I

Harness for open or
short-circuit between
ECM relay connector
and ECM connector.

If NG, repair harness or
connectors.

CHECK VOLTAGE BETWEEN ECCS
RELAY AND ENGINE GROUND.
Check voltage between ECM relay con-
nector terminals

q

1

,

q

3

and engine ground

with CONSULT-II or tester.
Voltage: Battery voltage

OK

E

NG

Check the following:

I

20A fuse

I

Fuse box and battery
connections

I

Harness for open or
short-circuit between
ECM relay and battery

If NG, replace fuse or
repair harness or connec-
tors.

CHECK ECM RELAY.
1. Remove ECM relay.
2. Apply 12V direct current between relay

terminals

q

1

and

q

2

.

3. Check continuity between relay termi-

nals

q

3

and

q

5

.

12V (

q

1

-

q

2

) applied:

Continuity exists.

No voltage applied:

No continuity

OK

E

NG

Replace ECM relay.

q

B

MEC944D

MEC945D

NEF350

H

H

H

H

H

TROUBLE DIAGNOSIS FOR POWER SUPPLY

TD27Ti

Diagnostic Procedure (Cont’d)

EC-377