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
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