2001 NISSAN ALMERA N16 Ignition coil

Component DescriptionNJEC0542IGNITION COIL AND POWER TRANSISTORNJEC0542S01The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the ignition
coil primary circuit. This on-off operation induces the proper high
voltage in the coil secondary circuit.
CONSULT-II Reference Value in Data Monitor
Mode
NJEC0543Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
IGNITION SW+Ignition switch: ON®OFF®ON ON®OFF®ON
ECM Terminals and Reference ValueNJEC0544Specification 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)
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
IGNITION SIGNALQG
Component Description
EC-451

Diagnostic ProcedureNJEC0579
1 CHECK ENGINE START
Turn ignition switch ªOFFº, and restart engine.
Is engine running?
YesorNo
Yes (With CONSULT-II)©GO TO 2.
Yes (Without CONSULT-
II)©GO TO 12.
No©GO TO 3.
2 SEARCH FOR MALFUNCTIONING CIRCUIT
With CONSULT-II
1. Perform ªPOWER BALANCEº in ªACTIVE TESTº mode with CONSULT-II.
2. Search for circuit which does not produce a momentary engine speed drop.
SEF190Y
©GO TO 12.
3 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.
SEF366X
OK or NG
OK©GO TO 4.
NG©GO TO TROUBLE DIAGNOSIS FOR POWER SUPPLY, EC-145.
IGNITION SIGNALQG
Diagnostic Procedure
EC-454

4 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
JEF121Y
3. Turn ignition switch ON.
4. Check voltage between condenser terminal 1 and ground with CONSULT-II or tester.
SEF367X
OK or NG
OK©GO TO 10.
NG©GO TO 5.
5 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect ECM relay. (For ECM relay location, refer to ªEngine Control Component Parts Locationº.)
3. Check harness continuity between ECM relay terminal 7 and condenser terminal 1. 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 7.
NG©GO TO 6.
6 DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM relay and condenser.
©Repair open circuit or short to ground or short to power in harness or connectors.
IGNITION SIGNALQG
Diagnostic Procedure (Cont'd)
EC-455

7 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
Check voltage between ECM relay terminal 6 and ground with CONSULT-II or tester.
SEF368X
OK or NG
OK©GO TO 9.
NG©GO TO 8.
8 DETECT MALFUNCTIONING PART
Check the following.
+15A fuse
+Harness for open and short between ECM relay and fuse
©Repair or replace harness or connectors.
9 CHECK ECM RELAY
Refer to ªComponent Inspectionº, EC-458.
OK or NG
OK©GO TO 17.
NG©Replace ECM relay.
10 CHECK CONDENSER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between condenser terminal 2 and engine ground. 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 11.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
11 CHECK CONDENSER
Refer to ªComponent Inspectionº, EC-458.
OK or NG
OK©GO TO 12.
NG©Replace condenser.
IGNITION SIGNALQG
Diagnostic Procedure (Cont'd)
EC-456

12 CHECK IGNITION COIL POWER SUPPLY CIRCUIT-V
1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
3. Disconnect ignition coil harness connector.
JEF119Y
4. Turn ignition switch ON.
5. Check voltage between ignition coil terminal 1 and ground with CONSULT-II or tester.
SEF122Y
OK or NG
OK©GO TO 14.
NG©GO TO 13.
13 DETECT MALFUNCTIONING PART
Check the following.
+Harness connector E75, F36 (If so equipped)
+Harness for open or short between ignition coil and ECM relay terminal 7
©Repair or replace harness or connectors.
14 CHECK IGNITION COIL GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between ignition coil terminal 2 and engine ground. 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 15.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
IGNITION SIGNALQG
Diagnostic Procedure (Cont'd)
EC-457

15 CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 35, 36, 37, 38 and ignition coil terminal 3. 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 16.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
16 CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to ªComponent Inspectionº, EC-458.
OK or NG
OK©GO TO 17.
NG©Replace ignition coil with power transistor.
17 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-144.
©INSPECTION END
SEF371Q
Component InspectionNJEC0547IGNITION COIL WITH POWER TRANSISTORNJEC0547S011. Disconnect ignition coil with power transistor harness connec-
tor.
2. Check ignition coil with power transistor for resistance as show
in the figure.
Terminal No. (Polarity) ResistanceW[at 25ÉC (77ÉF)]
3 (+) - 2 (þ) Except 0 or¥
1 (+) - 3 (þ)
Except 0
1 (+) - 2 (þ)
If NG, replace ignition coil with power transistor assembly.
SEF123Y
ECM RELAYNJEC0547S031. Apply 12V of direct current between ECM relay terminals 1 and
2.
2. Check continuity between ECM relay terminals 3 and 5, and 6
and 7.
Condition Continuity
12V direct current supply between ter-
minals 1 and 2Ye s
OFF No
IGNITION SIGNALQG
Diagnostic Procedure (Cont'd)
EC-458

EGR Volume Control Valve (Where Fitted)NJEC0560
Terminal No. ResistanceW[at 20ÉC (68ÉF)]
1-2
20-24 2-3
4-5
5-6
EGR Temperature Sensor (Where Fitted)NJEC0472
EGR temperature
ÉC (ÉF)Voltage
VResistance
MW
0 (32) 4.56 0.62 - 1.05
50 (122) 2.25 0.065 - 0.094
100 (212) 0.59 0.011 - 0.015
EVAP Canister Purge Volume Control ValveNJEC0481
Resistance [at 20ÉC (68ÉF)]W31-35
IACV-AAC ValveNJEC0474
Terminal No. ResistanceW[at 20ÉC (68ÉF)]
1-2
20-24 2-3
4-5
5-6
InjectorNJEC0475
Resistance [at 25ÉC (77ÉF)]W13.5 - 17.5
Ignition Coil with Power TransistorNJEC0561
Terminal No. (Polarity) ResistanceW[at 25ÉC (77ÉF)]
3 (+) - 2 (þ) Except 0 or¥
1 (+) - 3 (þ)
Except 0
1 (+) - 2 (þ)
CondenserNJEC0587
Resistance [at 25ÉC (77ÉF)] MWAbove 1
Fuel PumpNJEC0473
Resistance [at 25ÉC (77ÉF)]W0.2 - 5.0
SERVICE DATA AND SPECIFICATIONS (SDS)QG
EGR Volume Control Valve (Where Fitted)
EC-490

Diagnostic ProcedureNJAT0042
1 CHECK DTC WITH ECM
Perform diagnostic test mode II (self-diagnostic results) for engine control. Check ignition signal circuit condition.
OK or NG
OK (With CONSULT-II)©GO TO 2.
OK (Without CONSULT-
II)©GO TO 3.
NG©Check ignition signal circuit for engine control. Refer to EC-451, ªIGNITION SIGNALº.
2 CHECK INPUT SIGNAL (With CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select ªECU INPUT SIGNALSº in ªDATA MONITORº mode for ªA/Tº with CONSULT-II.
SAT580J
3. Read out the value of ªENGINE SPEEDº.
Check engine speed changes according to throttle position.
SAT645J
OK or NG
OK©GO TO 4.
NG©Check the following items:
+Harness for short or open between TCM and ECM
+Resistor and ignition coil
Refer to EC-451, ªIGNITION SIGNALº.
ENGINE SPEED SIGNALEXCEPT FOR EURO-OBD
Diagnostic Procedure
AT-172