Nissan Almera Tino V10 (2001 year). Manual — part 90
6
CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-II
Check the vacuum hose for vacuum existence when steering wheel is turned.
SEF778Z
Vacuum should exist.
OK or NG
OK
©
GO TO 9.
NG
©
GO TO 7.
7
CHECK VACUUM PORT
1. Stop engine.
2. Disconnect the vacuum hose connected to the air control valve (Power steering) at the vacuum port.
3. Blow air into vacuum port.
4. Check that air flows freely.
SEF779Z
OK or NG
OK
©
GO TO 8.
NG
©
Repair or clean vacuum port.
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-1001
8
CHECK VACUUM HOSES AND TUBES
1. Disconnect vacuum hoses between the air control valve (Power steering) and vacuum port, air control valve (Power
steering) and air duct.
2. Check hoses and tubes for cracks, clogging, improper connection or disconnection.
SEF109L
OK or NG
OK
©
GO TO 9.
NG
©
Repair hoses or tubes.
9
CHECK IACV-AAC VALVE
Refer to “Component Inspection”, EC-1003.
OK or NG
OK
©
GO TO 11.
NG
©
GO TO 10.
10
REPLACE IACV-AAC VALVE
1. Replace IACV-AAC valve assembly.
2. Perform “Idle Air Volume Learning”, EC-581.
Is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT
©
INSPECTION END
INCMP
©
Follow the construction of “Idle Air Volume Learning”.
11
CHECK TARGET IDLE SPEED
1. Turn ignition switch “OFF”.
2. Reconnect all harness connectors and vacuum hoses.
3. Start engine and warm it up to normal operating temperature.
4. Also warm up transmission to normal operating temperature.
+
For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “CVT” system indi-
cates less than 0.9V.
+
For models without CONSULT-II, drive vehicle for 10 minutes.
5. Stop vehicle with engine running.
6. Check target idle speed.
750
±
50 rpm
OK or NG
OK
©
GO TO 12.
NG
©
Perform “Idle Air Volume Learning”, EC-581.
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-1002
12
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.
©
INSPECTION END
SEF605Y
SEF089X
Component Inspection
NLEC1843
IACV-AAC VALVE
NLEC1843S01
1)
Disconnect IACV-AAC valve harness connector.
2)
Check IACV-AAC valve resistance.
Condition
Resistance
Terminal 2 and terminals 1, 3
20 - 24
Ω
[at 20°C (68°F)]
Terminal 5 and terminals 4, 6
3)
Reconnect IACV-AAC valve harness connector.
4)
Remove idle air adjusting unit assembly (IACV-AAC valve is
built-in) from throttle body.
(The IACV-AAC valve harness connector should remain con-
nected.)
5)
Turn ignition switch “ON” and “OFF”, and ensure the IACV-
AAC valve shaft smoothly moves forward and backward,
according to the ignition switch position.
If NG, replace the IACV-AAC valve.
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-1003
SEF211X
Component Description
NLEC1924
IGNITION COIL & POWER TRANSISTOR (BUILT INTO
DISTRIBUTOR)
NLEC1924S01
The ignition coil is built into distributor. The ignition signal from the
ECM is sent to the power transistor. The power transistor switches
on and off the ignition coil primary circuit. As the primary circuit is
turned on and off, the proper high voltage is induced in the coil
secondary circuit.
The distributor is not repairable and must be replaced as an
assembly except distributor cap and rotor head.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1925
MONITOR ITEM
CONDITION
SPECIFICATION
IGN TIMING
+
Engine: After warming up
+
Air conditioner switch: OFF
+
Shift lever: “N”
+
No-load
Idle
15°
±
2° BTDC
2,000 rpm
More than 25° BTDC
ECM Terminals and Reference Value
NLEC1926
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 damage 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)
35
W/B
Ignition signal
[Engine is running]
+
Warm-up condition
+
Idle speed
Approximately 0.3V
SEF996V
[Engine is running]
+
Engine speed is 2,000 rpm
Approximately 0.8V
SEF997V
IGNITION SIGNAL
SR20DE
Component Description
EC-1004
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
36
G
Ignition check
[Engine is running]
+
Warm-up condition
+
Idle speed
Approximately 13V
SEF998V
[Engine is running]
+
Engine speed is 2,000 rpm
Approximately 12V
SEF999V
IGNITION SIGNAL
SR20DE
ECM Terminals and Reference Value (Cont’d)
EC-1005
Wiring Diagram
NLEC1927
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1927S01
YEC761
IGNITION SIGNAL
SR20DE
Wiring Diagram
EC-1006
MODELS WITH ECM IN CABIN
NLEC1927S02
YEC938
IGNITION SIGNAL
SR20DE
Wiring Diagram (Cont’d)
EC-1007
Diagnostic Procedure
NLEC1928
1
CHECK ENGINE START
Turn ignition switch “OFF”, and restart engine.
Is engine running?
Yes or No
Yes
©
GO TO 7.
No
©
GO TO 2.
2
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect ignition coil harness connector.
SEF211X
3. Turn ignition switch “ON”.
4. Check voltage between ignition coil terminal 8 and ground with CONSULT-II or tester.
SEF257W
Voltage: Battery voltage
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors E76, F36
+
ECM relay
+
15A fuse
+
Harness for open or short between ignition coil and fuse
©
Repair harness or connectors.
IGNITION SIGNAL
SR20DE
Diagnostic Procedure
EC-1008
4
CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect camshaft position sensor harness connector.
3. Check harness continuity between CMPS terminal 5 and engine ground.
Refer to “Wiring Diagram”, EC-1006.
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-I
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 35 and CMPS terminal 6.
Refer to “Wiring Diagram”, EC-1006.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
6
CHECK IGNITION COIL, POWER TRANSISTOR
Refer to “Component Inspection”, EC-1010.
OK or NG
OK
©
GO TO 7.
NG
©
Replace malfunctioning component(s).
7
CHECK INPUT SIGNAL CIRCUIT-II
1. Stop engine.
2. Disconnect ignition coil harness connector and ECM harness connector.
SEF211X
3. Check harness continuity between ignition coil terminal 7 and ECM terminal 36.
Refer to “Wiring Diagram”, EC-1006.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 8.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
IGNITION SIGNAL
SR20DE
Diagnostic Procedure (Cont’d)
EC-1009
8
CHECK RESISTOR
Refer to “Component Inspection” EC-1011.
OK or NG
OK
©
GO TO 9.
NG
©
Replace distributor cap.
9
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.
©
INSPECTION END
SEF237X
SEF238X
Component Inspection
NLEC1929
IGNITION COIL
NLEC1929S01
1.
Disconnect ignition coil harness connector.
2.
Check resistance as shown in the figure.
3.
For checking secondary coil, remove distributor cap.
4.
Check resistance between ignition coil harness connector ter-
minal 8 and coil tower metal tip 9 (secondary terminal) on the
distributor head.
Terminal
Resistance [at 25°C (77°F)]
7 - 8 (Primary coil)
Approximately 2.2
Ω
8 - secondary terminal on distributor
head (Secondary coil)
Approximately 17 k
Ω
If NG, replace distributor.
SEF943XA
POWER TRANSISTOR
NLEC1929S02
1.
Disconnect power transistor harness connector and ignition
coil harness connector.
2.
Check power transistor resistance between terminals 5 and 7.
Terminals
Resistance
Result
5 and 7
Except 0
Ω
OK
0
Ω
NG
If NG, replace distributor.
IGNITION SIGNAL
SR20DE
Diagnostic Procedure (Cont’d)
EC-1010
SEF944X
RESISTOR
NLEC1929S03
1.
Disconnect resistor harness connector.
2.
Check resistance as shown in the figure.
Resistance: Approximately 5 k
Ω
[at 25°C (77°F)]
If NG, replace distributor cap.
IGNITION SIGNAL
SR20DE
Component Inspection (Cont’d)
EC-1011
System Description
NLEC1844
These circuit lines are used to control the smooth shifting up and down of CVT during the hard acceleration/
deceleration.
Voltage signals are exchanged between ECM and TCM (Transmission Control Module).
A/T COMMUNICATION LINE
SR20DE
System Description
EC-1012
Wiring Diagram
=NLEC1845
YEC719
A/T COMMUNICATION LINE
SR20DE
Wiring Diagram
EC-1013
Diagnostic Procedure
NLEC1846
1
CHECK OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Check the voltage between ECM terminals 10, 19, 54, 55, 56 and ground.
SEF791Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.
SEF116Y
3. Check harness continuity between the following terminals.
MTBL0574
Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK
©
GO TO 3.
NG
©
Repair harness or connectors.
A/T COMMUNICATION LINE
SR20DE
Diagnostic Procedure
EC-1014
3
CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR SHORT
1. Check harness continuity between ECM terminals 10, 19, 54, 55, 56 and ground.
Refer to Wiring Diagram.
Continuity should not exist.
2. Also check harness for short to power.
OK or NG
OK
©
GO TO 4.
NG
©
Repair short to ground or short to power in harness or connectos.
4
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.
©
INSPECTION END
A/T COMMUNICATION LINE
SR20DE
Diagnostic Procedure (Cont’d)
EC-1015
SEF781Z
Component Description
NLEC1847
When the gear position is “P” or “N”, park/neutral position (PNP)
switch is “ON”.
ECM detects the park/neutral position when continuity with ground
exists.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1848
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
P/N POSI SW
+
Ignition switch: ON
Shift lever: “P” or “N”
ON
Except above
OFF
ECM Terminals and Reference Value
NLEC1849
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)
42
G/OR
PNP switch
[Ignition switch “ON”]
+
Gear position is “N” or “P”
Approximately 0V
[Ignition switch “ON”]
+
Except the above gear position
BATTERY VOLTAGE
(11 - 14V)
PARK/NEUTRAL POSITION (PNP) SWITCH
SR20DE
Component Description
EC-1016
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