Nissan Almera Tino V10 (2001 year). Manual — part 92
ECM Terminals and Reference Value
=NLEC1868
Specification 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
COLOR
ITEM
CONDITION
DATA (DC Voltage)
21
B/P
Fuel pump relay
[Ignition switch “ON”]
+
For 1 second after turning ignition switch “ON”
[Engine is running]
0 - 1V
[Ignition switch “ON”]
+
More than 1 second after turning ignition switch
“ON”
BATTERY VOLTAGE
(11 - 14V)
FUEL PUMP
SR20DE
ECM Terminals and Reference Value
EC-1033
Wiring Diagram
NLEC1869
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1869S01
YEC714
FUEL PUMP
SR20DE
Wiring Diagram
EC-1034
MODELS WITH ECM IN CABIN
NLEC1869S02
YEC942
FUEL PUMP
SR20DE
Wiring Diagram (Cont’d)
EC-1035
Diagnostic Procedure
NLEC1870
1
CHECK OVERALL FUNCTION
1. Turn ignition switch “ON”.
2. Pinch fuel feed hose with fingers.
SEF812Z
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned “ON”.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect fuel pump relay.
SEF633Z
3. Turn ignition switch “ON”.
4. Check voltage between terminals 1, 5 and ground with CONSULT-II or tester.
SEF607X
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
FUEL PUMP
SR20DE
Diagnostic Procedure
EC-1036
3
DETECT MALFUNCTIONING PART
Check the following.
+
10A fuse
+
15A fuse
+
Harness for open or short between fuse and fuel pump relay
©
Repair harness or connectors.
4
CHECK POWER GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect fuel level sensor unit and fuel pump harness connector.
SEF632Z
3. Check harness continuity between fuel level sensor unit and fuel pump terminal 3 and body ground, fuel level sensor
unit and fuel pump terminal 5 and fuel pump relay terminal 3.
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 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
+
Harness for open or short between fuel level sensor unit and fuel pump and body ground
+
Harness for open or short between fuel level sensor unit and fuel pump and fuel pump relay
©
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK OUTPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 21 and fuel pump relay connector terminal 2.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 8.
NG
©
GO TO 7.
FUEL PUMP
SR20DE
Diagnostic Procedure (Cont’d)
EC-1037
7
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors B2, M15 (LHD models), B47, M65 (RHD models)
+
Harness connectors M49, F43 (where fitted)
+
Harness connectors M71, F45 (where fitted)
+
Harness for open or short between ECM and fuel pump relay
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
8
CHECK FUEL PUMP RELAY
Refer to “Component Inspection”, EC-1038.
OK or NG
OK
©
GO TO 9.
NG
©
Replace fuel pump relay.
9
CHECK FUEL PUMP
Refer to “Component Inspection”, EC-1038.
OK or NG
OK
©
GO TO 10.
NG
©
Replace fuel pump.
10
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.
©
INSPECTION END
SEF145X
Component Inspection
NLEC1871
FUEL PUMP RELAY
NLEC1871S01
Check continuity between terminals 3 and 5.
Conditions
Continuity
12V direct current supply between terminals 1 and 2
Yes
No current supply
No
If NG, replace relay.
SEF634Z
FUEL PUMP
NLEC1871S02
1.
Disconnect fuel level sensor unit and fuel pump harness con-
nector.
2.
Check resistance between terminals 3 and 5.
Resistance: 0.2 - 5.0
Ω
[at 25°C (77°F)]
If NG, replace fuel pump.
FUEL PUMP
SR20DE
Diagnostic Procedure (Cont’d)
EC-1038
SEF903Z
Component Description
NLEC1872
The power steering oil pressure switch is attached to the power
steering high-pressure tube and detects a power steering load.
When a power steering load is detected, it signals the ECM. The
ECM adjusts the IACV-AAC valve to increase the idle speed and
adjust for the increased load.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1873
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
PW/ST SIGNAL
+
Engine: After warming up, idle
the engine
Steering wheel in neutral position
(forward direction)
OFF
The steering wheel is fully turned
ON
ECM Terminals and Reference Value
NLEC1874
Specification 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
COLOR
ITEM
CONDITION
DATA (DC Voltage)
46
PU/W
Power steering oil pressure
switch
[Engine is running]
+
Steering wheel is fully turned
Approximately 0V
[Engine is running]
+
Steering wheel is not turned
Approximately 5V
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Component Description
EC-1039
Wiring Diagram
NLEC1875
YEC715
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Wiring Diagram
EC-1040
Diagnostic Procedure
=NLEC1876
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CONSULT-II under the following conditions.
SEF311Y
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
3
CHECK OVERALL FUNCTION
Without CONSULT-II
1. Start engine.
2. Check voltage between ECM terminal 46 and ground under the following conditions.
SEF614Y
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Diagnostic Procedure
EC-1041
4
CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect power steering oil pressure switch harness connector.
SEF903Z
3. Check harness continuity between power steering oil pressure switch terminal 2 and engine ground.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to power.
OK or NG
OK
©
GO TO 5.
NG
©
Repair open circuit or short to power in harness or connectors.
5
CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 46 and power steering oil pressure switch terminal 1.
Refer to wiring diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM and power steering oil pressure switch.
©
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK POWER STEERING OIL PRESSURE SWITCH
Refer to “Component Inspection”, EC-1043.
OK or NG
OK
©
GO TO 8.
NG
©
Replace power steering oil pressure switch.
8
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.
©
INSPECTION END
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Diagnostic Procedure (Cont’d)
EC-1042
Component Inspection
NLEC1877
POWER STEERING OIL PRESSURE SWITCH
NLEC1877S01
1.
Disconnect power steering oil pressure switch harness con-
nector then start engine.
2.
Check continuity between terminals 1 and 2.
Refer to wiring diagram.
Conditions
Continuity
Steering wheel is being fully turned.
Yes
Steering wheel is not being turned.
No
If NG, replace power steering oil pressure switch.
POWER STEERING OIL PRESSURE SWITCH
SR20DE
Component Inspection
EC-1043
JEF147Y
Description
NLEC1878
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan sys-
tem.
SEF099X
ECM Terminals and Reference Value
NLEC1879
Specification 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
COLOR
ITEM
CONDITION
DATA (DC Voltage)
58
B
Sensor’s ground
[Engine is running]
+
Warm-up condition
+
Idle speed
Approximately 0V
74
R/L
Refrigerant pressure
sensor
[Engine is running]
+
Warm-up condition
+
Both A/C switch and blower switch are “ON”
(Compressor operates.)
1.0 - 4.0V
111
R
Sensor’s power supply
[Ignition switch “ON”]
Approximately 5V
REFRIGERANT PRESSURE SENSOR
SR20DE
Description
EC-1044
Wiring Diagram
NLEC1880
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1880S03
YEC707
REFRIGERANT PRESSURE SENSOR
SR20DE
Wiring Diagram
EC-1045
MODELS WITH ECM IN CABIN
NLEC1880S04
YEC943
REFRIGERANT PRESSURE SENSOR
SR20DE
Wiring Diagram (Cont’d)
EC-1046
Diagnostic Procedure
NLEC1881
1
CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch “ON”.
3. Check voltage between ECM terminal 74 and ground with CONSULT-II or tester.
SEF952XA
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn A/C switch and blower switch “OFF”.
2. Stop engine.
3. Disconnect refrigerant pressure sensor harness connector.
JEF147Y
4. Turn ignition switch “ON”.
5. Check voltage between refrigerant pressure sensor terminal 3 and ground with CONSULT-II or tester.
SEF953X
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
REFRIGERANT PRESSURE SENSOR
SR20DE
Diagnostic Procedure
EC-1047
3 DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors E76, F36
+
Joint connector-3 (where fitted)
+
Joint connector F46 (where fitted)
+
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair harness or connectors.
4 CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Check harness continuity between refrigerant pressure sensor terminal 1 and engine ground. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5 DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors E76, F36
+
Joint connector-1 (where fitted)
+
Joint connector F46 (where fitted)
+
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair open circuit or short to power in harness or connectors.
6 CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 74 and refrigerant pressure sensor terminal 2. Refer to Wiring Dia-
gram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 8.
NG
©
GO TO 7.
7 DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors E76, F36
+
Harness for open or short between ECM and refrigerant pressure sensor
©
Repair open circuit or short to ground or short to power in harness or connectors.
8 CHECK REFRIGERANT PRESSURE SENSOR
Refer to HA-12 or HA-74 , “Refrigerant pressure sensor”.
OK or NG
OK
©
GO TO 9.
NG
©
Replace refrigerant pressure sensor.
REFRIGERANT PRESSURE SENSOR
SR20DE
Diagnostic Procedure (Cont’d)
EC-1048
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