IGNITION SYSTEM (M13 ENGINE) 6F2-5
Reference Waveform
Oscilloscope waveforms of CMP sensor and No.1/No.4 ignition
trigger signal are as shown in figure when connecting oscillo-
scope between terminals E22-10 of ECM connectors connected
to ECM and ground, and between terminal E23-32 and ground.
Measurement condition for waveform [A]
Measurement condition for waveform [B]
Ignition System Diagnostic Flow Table
Measurement
terminal
CH1: E22-10 to E23-1
CH2: E23-32 to E23-1
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 40 ms/DIV
Measurement
condition
After warmed up engine to normal oper-
ating temperature
Engine at specified idle speed
Measurement
terminal
CH1: E22-10 to E23-1
CH2: E23-32 to E23-1
Oscilloscope
setting
CH1: 2 V/DIV, CH2: 2 V/DIV
TIME: 10 ms/DIV
Measurement
condition
After warmed up engine to normal oper-
ating 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
Step Action Yes No
1
Was “Engine and Emission Control System Check” in
Section 6-2 performed?
Go to Step 2. Go to “Engine and
Emission Control Sys-
tem Check” in Section
6-2.
2
Ignition Spark Test
1) Check all spark plugs for condition and type referring
to “Spark Plugs Inspection” in this section.
2) If OK, perform ignition spark test, referring to “Igni-
tion Spark Test” in this section.
Is spark emitted from all spark plugs?
Go to Step 11. Go to Step 3.
3
Diagnostic Trouble Code (DTC) Check
Is DTC stored in ECM?
Go to applicable
DTC Diag. Flow
Table in Section 6-2.
Go to Step 4.
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