Ignition System: 1H-4
Diagnostic Information and Procedures
Ignition System Symptom Diagnosis
S4RS0A1804001
Reference Waveform of Ignition System
S4RS0A1804002
1) Remove ECM from its bracket with ECM connectors
connected referring to “Engine Control Module
(ECM) Removal and Installation: in Section 1C”.
2) Oscilloscope waveform of CMP sensor and No.1/
No.4 ignition trigger signal are as shown in the figure
when connecting oscilloscope between terminal
“C37-20” of ECM connector and ground, and
between terminal “C37-6” and ground.
Measurement condition for waveform [A]
Measurement condition for waveform [B]
Condition
Possible cause
Correction / Reference Item
Engine cranks, but will
not start or hard to start
(No spark)
Blown fuse for ignition coil
Replace.
Loose connection or disconnection of
lead wire or high-tension cord(s)
Connect securely.
Faulty high-tension cord(s)
Replace.
Faulty spark plug(s)
Replace.
Faulty ignition coil
Replace ignition coil assembly.
Faulty CKP sensor or CKP sensor plate
Clean, tighten or replace.
Faulty CMP sensor or sensor rotor tooth
of camshaft
Clean, tighten or replace.
Faulty ECM
Replace.
Poor fuel economy or
engine performance
Incorrect ignition timing
Check related sensors and CKP sensor plate.
Faulty spark plug(s) or high-tension
cord(s)
Adjust, clean or replace.
Faulty ignition coil assembly
Replace.
Faulty CKP sensor or CKP sensor plate
Clean, tighten or replace.
Faulty CMP sensor or sensor rotor tooth
of camshaft
Clean, tighten or replace.
Faulty knock sensor
Replace.
Faulty ECM
Replace.
Measurement
terminal
CH1: “C37-20” to “C37-58”
CH2: “C37-6” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
Time: 40 ms/DIV
Measurement
condition
After warmed up engine to normal
operating temperature
Engine at specified idle speed
Measurement
terminal
CH1: “C37-20” to “C37-58”
CH2: “C37-6” to “C37-58”
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
Time: 10 ms/DIV
Measurement
condition
After warmed up engine to normal
operating temperature
Engine at specified idle speed
[A]: Oscilloscope waveforms at specified idle speed
[B]: Detail waveforms at specified idle speed
1. No.1 ignition trigger signal
2. CMP sensor signal
3. Primary coil current flow time
4. No.4 ignition trigger signal
I3RB0A180003-
Содержание SWIFT RS415 2017
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Страница 1255: ...Prepared by 1st Ed Dec 2004...
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