ignition NISSAN ALMERA 2001 Service Manual

ECM HARNESS CONNECTOR TERMINAL LAYOUTNJEC0044S02
SEF970W
ECM INSPECTION TABLENJEC0044S03Specification data are reference values and are measured between
each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM's
transistor. Use a ground other than ECM terminals, such as
the ground.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
1 Y/RIntake valve timing con-
trol solenoid valve[Engine is running]
+Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Lift up drive wheels and suitable gear posi-
tion
+Rev engine from 2,000 to 3,000 rpmApproximately 0V
3 W/RHeated oxygen sensor 2
heater (rear)[Engine is running]
+Engine speed is below 3,600 rpm
+After driving for 2 minutes at a speed of 70
km/h (43 MPH) or moreApproximately 0.7V
[Ignition switch ªONº]
+Engine stopped
+Engine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
4 R/BHeated oxygen sensor 1
heater (front)[Engine is running]
+Engine speed is below 3,200 rpmApproximately 0V
[Engine is running]
+Engine speed is above 3,200 rpmBATTERY VOLTAGE
(11 - 14V)
6
7
15
16BR
L/G
P
ORIACV-AAC valve[Engine is running]
+Warm-up condition
+Idle speed0.1 - 14V
8*
9*
17*
18*SB
W/B
R/Y
BR/REGR volume control
valve[Engine is running]
+Warm-up condition
+Rev engine from 2,000 to 4,000 rpm0 - 14V
10 Y/B A/T signal No. 3[Engine is running]
+Idle speedApproximately 0V
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-166

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
13 LG/R Cooling fan relay[Engine is running]
+Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Cooling fan is operatingApproximately 0V
14 GY/LEVAP canister purge
volume control valve
(ON/OFF duty)[Engine is running]
+Warm-up condition
+Accelerator pedal depressed5 - 12V
SEF975W
19 BR/W A/T signal No. 5[Engine is running]
+Idle speedApproximately 8V
21 B/P Fuel pump relay[Ignition switch ªONº]
+For 1 second after turning ignition switch
ªONº
[Engine is running]0-1V
[Ignition switch ªONº]
+More than 1 second after turning ignition
switch ªONºBATTERY VOLTAGE
(11 - 14V)
22 OR/L Malfunction indicator[Ignition switch ªONº]0-1V
[Engine is running]
+Idle speedBATTERY VOLTAGE
(11 - 14V)
23 L Air conditioner relay[Engine is running]
+Both A/C switch and blower switch are ªONºApproximately 0V
[Engine is running]
+A/C switch is ªOFFºBATTERY VOLTAGE
(11 - 14V)
31 W/G ECM relay (Self shut-off)[Ignition switch ªOFFº]
+For 9 seconds after turning ignition switch
ªOFFº0-1V
[Ignition switch ªOFFº]
+9 seconds passed after turning ignition switch
ªOFFºBATTERY VOLTAGE
(11 - 14V)
32 L/OR Tachometer[Engine is running]
+Warm-up condition
+Idle speed7-8V
SEF928X
[Engine is running]
+Engine speed is 2,000 rpm7-8V
SEF929X
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-167

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
35
36
37
38L/W
PU
L/R
GY/RIgnition signal (No. 1)
Ignition signal (No. 2)
Ignition signal (No. 3)
Ignition signal (No. 4)[Engine is running]
+Warm-up condition
+Idle speed0 - 0.2V
SEF971W
[Engine is running]
+Engine speed is 2,000 rpm0.2 - 0.4V
SEF972W
40* Y/PUThrottle position switch
(Closed position)[Engine is running]
+Accelerator pedal releasedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Accelerator pedal depressedApproximately 0V
41 B/Y Start signal[Ignition switch ªONº]Approximately 0V
[Ignition switch ªSTARTº]9 - 12V
42 G/OR PNP switch[Ignition switch ªONº]
+Gear position is ªNeutral positionº (M/T mod-
els)
+Gear position is ªPº or ªNº (A/T models)Approximately 0V
[Ignition switch ªONº]
+Except the above gear positionA/T models
BATTERY VOLTAGE
(11 - 14V)
M/T models
Approximately 5V
43 B/R Ignition switch[Ignition switch ªOFFº]0V
[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
44 L/R Air conditioner switch[Engine is running]
+Both air conditioner switch and blower switch
are ªONº (Compressor operates)Approximately 0V
[Engine is running]
+Air conditioner switch is ªOFFºApproximately 5V
46 PU/WPower steering oil pres-
sure switch[Engine is running]
+Steering wheel is fully turnedApproximately 0V
[Engine is running]
+Steering wheel is not turnedApproximately 5V
48 B ECM ground[Engine is running]
+Idle speedEngine ground
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-168

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
50 L/BElectrical load signal
(Headlamp and
Rear defogger)[Engine is running]
+Headlamp switch or rear defogger switch is
ªONºBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+Headlamp switch and rear defogger switch
are ªOFFºApproximately 0V
51 LG/B Blower fan SW[Ignition switch ªONº]
+Blower fan switch is ªONºApproximately 0V
[Ignition switch ªONº]
+Blower fan switch is ªOFFºApproximately 5V
54 Y/R A/T signal No. 1[Engine is running]
+Idle speedApproximately 0V
55 Y/G A/T signal No. 2[Engine is running]
+Idle speedApproximately 0V
56 G/Y A/T signal No. 4[Engine is running]
+Idle speedApproximately 0V
57 B ECM ground[Engine is running]
+Idle speedEngine ground
58 B Sensors' ground[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
61 G Mass air flow sensor[Engine is running]
+Warm-up condition
+Idle speed1.0 - 1.7V
[Engine is running]
+Warm-up condition
+Engine speed is 2,500 rpm1.5 - 2.1V
62 WHeated oxygen sensor 1
(front)[Engine is running]
+Warm-up condition
+Engine speed is 2,000 rpm0 - Approximately 0.7V
SEF008W
63 LHeated oxygen sensor 2
(rear)[Engine is running]
+After warming up to normal operating tem-
perature and engine speed is 3,000 rpm0 - Approximately 1.0V
64 Y/BIntake air temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
intake air temperature
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-169

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
66
75R
RCamshaft position sen-
sor (PHASE)[Engine is running]
+Warm-up condition
+Idle speed2.0 - 3.0V
SEF977W
[Engine is running]
+Engine speed is 2,000 rpm2.0 - 3.0V
SEF978W
67 W/LPower supply for ECM
(Back-up)[Ignition switch ªOFFº]BATTERY VOLTAGE
(11 - 14V)
70 BR/WEngine coolant tempera-
ture sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature
71 GYThrottle position sensor
signal output[Engine is running]
+Warm-up condition
+Accelerator pedal fully releasedApproximately 0.4V
[Ignition switch ªONº]
+Accelerator pedal fully depressedApproximately 4V
72* P/B EGR temperature sensor[Engine is running]
+Warm-up condition
+Idle speedLess than 4.5V
[Engine is running]
+Warm-up condition
+EGR system is operating0 - 1.0V
73 BMass air flow sensor
ground[Engine is running]
+Warm-up condition
+Idle speedApproximately 0V
74 R/LRefrigerant pressure
sensor[Engine is running]
+Air conditioner switch is ªONº
(Compressor operates)1.0 - 4.0V
[Engine is running]
+Warm-up condition
+Idle speed
+Air conditioner switch is turned from ªONº to
ªOFFºVoltage is gradually decreasing.
81 W Knock sensor[Engine is running]
+Idle speed1.0 - 4.0V
82* L/WFuel tank temperature
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with fuel
temperature
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-170

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
85 RCrankshaft position sen-
sor (POS)[Engine is running]
+Warm-up condition
+Idle speed3.0 - 4.0V
SEF979W
[Engine is running]
+Engine speed is 2,000 rpm3.0 - 4.0V
SEF980W
86 PU/R Vehicle speed sensor[Engine is running]
+Lift up the vehicle
+Vehicle speed is 40 km/h (25 MPH)2.5-3V
SEF976W
91 PU A/T check signal[Engine is running]
+Idle speed0 - Approximately 5V
92 Y Throttle position sensor[Engine is running]
+Accelerator pedal released0.15 - 0.85V
[Ignition switch ªONº]
+Accelerator pedal fully depressed3.5 - 4.7V
93 G/R Data link connector[Engine is running]
+Idle speed (CONSULT-II or GST is discon-
nected)Approximately 0V
101
103
105
107R/B
YB
GB
L/BInjector No. 1
Injector No. 2
Injector No. 3
Injector No. 4[Engine is running]
+Warm-up condition
+Idle speedBATTERY VOLTAGE
(11 - 14V)
SEF011W
[Engine is running]
+Warm-up condition
+Engine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
SEF012W
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-171

TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
104* SBSwirl control valve con-
trol solenoid valve[Engine is running]
+Engine coolant temperature is between 15ÉC
(59ÉF) to 40ÉC (104ÉF)
+Idle speed0-1V
[Engine is running]
+Engine coolant temperature is above 40ÉC
(104ÉF)
+Idle speedBATTERY VOLTAGE
(11 - 14V)
106
108B/Y ECM ground[Engine is running]
+Idle speedEngine ground
11 0
11 2W
WPower supply for ECM[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
111 R Sensors' power supply[Ignition switch ªONº]Approximately 5V
114 GY/R Adjust switch[Engine is running]
+Idle speed0V
115 LG Data link connector[Engine is running]
+Idle speed (CONSULT-II or GST is discon-
nected)0 - 10V
* If so equipped
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
ECM Terminals and Reference Value (Cont'd)
EC-172

ECM TERMINALS AND REFERENCE VALUENJEC0048Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
31 W/G ECM relay (Self shut-off)[Engine is running]
[Ignition switch ªOFFº]
+For 9 seconds after turning ignition switch ªOFFº0-1V
[Ignition switch ªOFFº]
+9 seconds passed after turning ignition switch
ªOFFºBATTERY VOLTAGE
(11 - 14V)
43 B/R Ignition switch[Ignition switch ªOFFº]0V
[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
48 B ECM ground[Engine is running]
+Idle speedEngine ground
57 B ECM ground[Engine is running]
+Idle speedEngine ground
67 W/LPower supply for ECM
(Back-up)[Ignition switch ªOFFº]BATTERY VOLTAGE
(11 - 14V)
106
108B/Y
B/YECM ground[Engine is running]
+Idle speedEngine ground
11 0
11 2W
WPower supply for ECM[Ignition switch ªONº]BATTERY VOLTAGE
(11 - 14V)
DIAGNOSTIC PROCEDURENJEC0565
1 INSPECTION START
Start engine.
Is engine running?
YesorNo
Ye s©GO TO 9.
No©GO TO 2.
TROUBLE DIAGNOSIS FOR POWER SUPPLYQG
Main Power Supply and Ground Circuit (Cont'd)
EC-181

2 CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ªOFFº and then ªONº.
2. Check voltage between ECM terminal 43 and ground with CONSULT-II or tester.
SEF291X
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING PART
Check the following.
+Harness connectors E74, F35 (If so equipped)
+Harness connectors M21, E106 (Sedan), M160, E175 or M169, F113 (Hatchback)
+Fuse block (J/B) connector M1, E103
+10A fuse
+Harness for open or short between ECM and ignition switch
©Repair harness or connectors.
4 CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.
Refer to WIRING DIAGRAM.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 5.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLYQG
Main Power Supply and Ground Circuit (Cont'd)
EC-182

5 CHECK POWER SUPPLY-II
1. Disconnect ECM relay. (For ECM relay location, refer to ªEngine Control Compartment Parts Locationº.)
2. Check voltage between ECM relay terminals 1, 6 and ground with CONSULT-II or tester.
SEF101Y
OK or NG
OK©GO TO 7.
NG©GO TO 6.
6 DETECT MALFUNCTIONING PART
Check the following.
+15A fuse and 10A fuse
+Harness connectors E75, F36 (If so equipped)
+Harness for open or short between ECM relay and battery
©Repair open circuit or short to ground or short to power in harness or connectors.
7 CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 31 and ECM relay terminal 2.
Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
OK©Go to ªIGNITION SIGNALº, EC-547.
NG©GO TO 8.
8 DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM relay and ECM.
©Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLYQG
Main Power Supply and Ground Circuit (Cont'd)
EC-183