Page 2017 of 3502
IGNITION SIGNAL
EC-735
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IGNITION SIGNALPFP:22448
Component DescriptionBBS00560
IGNITION COIL & POWER TRANSISTOR
The 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.
PBIB2181E
Page 2018 of 3502
EC-736
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IGNITION SIGNAL
Wiring DiagramBBS00561
TBWM1467E
Page 2019 of 3502
IGNITION SIGNAL
EC-737
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EC
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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
111 W / BECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition
switch OFF0 - 1.5V
[Ignition switch: OFF]
More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
11 9
120R/G
R/GPower supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
Page 2020 of 3502
EC-738
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IGNITION SIGNAL
TBWH0155E
Page 2021 of 3502
IGNITION SIGNAL
EC-739
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EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
60
61
62P/W
L/R
Y/RIgnition signal No. 5
Ignition signal No. 3
Ignition signal No. 1[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.0 - 0.3V
[Engine is running]
Warm-up condition
Engine speed: 2,500 rpm0.1 - 0.6V
SEC986C
SEC987C
Page 2022 of 3502
EC-740
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IGNITION SIGNAL
TBWH0156E
Page 2023 of 3502
![NISSAN TEANA 2003 Service Manual IGNITION SIGNAL
EC-741
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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do n NISSAN TEANA 2003 Service Manual IGNITION SIGNAL
EC-741
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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do n](/manual-img/5/57392/w960_57392-2022.png)
IGNITION SIGNAL
EC-741
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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureBBS00562
1. CHECK ENGINE START
Turn ignition switch OFF and restart engine.
Is engine running?
Ye s o r N o
Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No >> GO TO 4.
2. CHECK OVERALL FUNCTION
With CONSULT-II
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
2. Make sure that each circuit produces a momentary engine
speed drop.
OK or NG
OK >>INSPECTION END
NG >> GO TO 10.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
79
80
81GR/R
GR
G/RIgnition signal No. 6
Ignition signal No. 4
Ignition signal No. 2[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.0 - 0.3V
[Engine is running]
Warm-up condition
Engine speed: 2,500 rpm0.1 - 0.6V
SEC986C
SEC987C
PBIB0133E
Page 2024 of 3502
EC-742
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IGNITION SIGNAL
3. CHECK OVERALL FUNCTION
Without CONSULT-II
1. Let engine idle.
2. Read the voltage signal between ECM terminals 60, 61, 62, 79,
80, 81 and ground with an oscilloscope.
3. Verify that the oscilloscope screen shows the signal wave as
shown below.
NOTE:
The pulse cycle changes depending on rpm at idle.
OK or NG
OK >>INSPECTION END
NG >> GO TO 10.
4. CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
2. Check voltage between ECM terminals 119, 120 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> Go to EC-451, "
POWER SUPPLY AND GROUND CIR-
CUIT" .
PBIB1186E
SEC986C
Voltage: Battery voltage
MBIB0034E