Nissan Primera P11. Manual — part 226
ECM Terminals and Reference Value
NCEC0044
PREPARATION
NCEC0044S01
1.
ECM is located behind the center console. For this inspection:
Remove the front passenger center console panel.
2.
Remove ECM harness protector.
3.
Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.
I
Open harness securing clip to make testing easier.
I
Use extreme care not to touch 2 pins at one time.
I
Data is for comparison and may not be exact.
ECM HARNESS CONNECTOR TERMINAL LAYOUT
NCEC0044S02
ECM INSPECTION TABLE
NCEC0044S03
Specification data are reference values and are measured between
each terminal and 48 (ECM ground).
SEF967W
SEF367I
SEF970W
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
ECM Terminals and Reference Value
EC-103
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
3
W/R
Heated oxygen sensor
2 (rear) heater
[Engine is running]
I
Below 3,600 rpm [After driving for 2 minutes
at a speed of 70 km/h (43 MPH) or more]
Approximately 0.7V
[Ignition switch “ON”]
I
Engine stopped
I
Engine speed is above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
4
L
Heated oxygen sensor
1 (front) heater
[Engine is running]
I
Idle speed
Approximately 0V
[Engine is running]
I
More than 20 seconds after exceeding 3,200
rpm
BATTERY VOLTAGE
(11 - 14V)
6
7
15
16
BR
Y/B
P
OR
IACV-AAC valve
[Engine is running]
I
Warm-up condition
I
Idle speed
0 - 14V
10
R/W
CVT signal No. 3
[Engine is running]
I
Idle speed
0V
13
LG/R
Cooling fan relay
[Engine is running]
I
Cooling fan is not operating
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Cooling fan is operating
Approximately 0V
14
P/B
EVAP canister purge
volume control solenoid
valve (ON/OFF duty)
[Engine is running]
I
Warm-up condition
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Warm-up condition
I
2,000 rpm
5 - 12V
SEF975W
19
L/R
CVT signal No. 5
[Engine is running]
I
Idle speed
Approximately 7.5V
21
B/P
Fuel pump relay
[Ignition switch “ON”]
I
For 2 seconds after turning ignition switch
“ON”
[Engine is running]
0 - 1V
[Ignition switch “ON”]
I
More than 1 second after turning ignition
switch “ON”
BATTERY VOLTAGE
(11 - 14V)
22
OR/L
Malfunction indicator
[Ignition switch “ON”]
0 - 1V
[Engine is running]
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
23
—
Air conditioner switch
[Engine is running]
I
Both A/C switch and blower switch are “ON”
Approximately 0V
[Engine is running]
I
A/C switch is “OFF”
BATTERY VOLTAGE
(11 - 14V)
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
ECM Terminals and Reference Value (Cont’d)
EC-104
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
31
W/G
ECM relay (Self shut-
off)
[Engine is running]
[Ignition switch “OFF”]
I
For 9 seconds after turning ignition switch
“OFF”
0 - 1V
[Ignition switch “OFF”]
I
9 seconds passed after turning ignition switch
“OFF”
BATTERY VOLTAGE
(11 - 14V)
32
L/OR
Tachometer
[Engine is running]
I
Warm-up condition
I
Idle speed
Approximately 10.5V
SEF973W
[Engine is running]
I
Engine speed is 2,000 rpm
Approximately 10.5V
SEF974W
35
W/L
Ignition signal
[Engine is running]
I
Warm-up condition
I
Idle speed
Approximately 0.3V
SEF996V
[Engine is running]
I
Engine speed is 2,000 rpm
Approximately 0.8V
SEF997V
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
ECM Terminals and Reference Value (Cont’d)
EC-105
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
36*1
G
Ignition check
[Engine is running]
I
Warm-up condition
I
Idle speed
Approximately 13V
SEF998V
[Engine is running]
I
Engine speed is 2,000 rpm
Approximately 12V
SEF999V
40
Y
Throttle position switch
(Closed position)
[Engine is running]
I
Accelerator pedal released
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
I
Accelerator pedal depressed
Approximately 0V
41
B/Y
Start signal
[Ignition switch “ON”]
Approximately 0V
[Ignition switch “START”]
9 - 12V
42
G/OR
PNP switch
[Ignition switch “ON”]
I
Gear position is “Neutral position” (M/T mod-
els)
I
Gear position is “P” or “N” (CVT models)
Approximately 0V
[Ignition switch “ON”]
I
Except the above gear position
BATTERY VOLTAGE
(11 - 14V)
43
B/R
Ignition switch
[Ignition switch “OFF”]
0V
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
44
—
Air conditioner switch
[Engine is running]
I
Both air conditioner switch and blower switch
are “ON” (Compressor operates)
Approximately 0V
[Engine is running]
I
Air conditioner switch is “OFF”
Approximately 5V
46
PU/W
Power steering oil pres-
sure switch
[Engine is running]
I
Steering wheel is fully turned
Approximately 0V
[Engine is running]
I
Steering wheel is not turned
Approximately 5V
48
B
ECM ground
[Engine is running]
I
Idle speed
Engine ground
(Probe this terminal with (−)
tester probe when measuring)
50
R
Electric load signal
[Engine is running]
I
Headlamp switch or rear window defogger
switch is “ON”
BATTERY VOLTAGE
(11 - 14V)
*1: If so equipped
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
SR20DE
ECM Terminals and Reference Value (Cont’d)
EC-106
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