Stratus Coupe L4-2.4L VIN G (2003)
<M/T>
Connect the oscilloscope probe to ECM terminal No.10 (for number 1 number 4), terminal No.23 (for number 2 - number 3) respectively.
<A/T>
Connect the oscilloscope probe to PCM terminals No.11 (for number 1 - number 4), terminal No.12 (for number 2 - number 3) respectively.
Wave Pattern Observation Points
Point: Condition of wave pattern build-up section and maximum voltage (Refer to abnormal wave pattern examples 1 and 2.
Examples of Abnormal Wave Patterns
Example 1 (Wave pattern during engine cranking)
Wave Pattern Observation Points
-
Cause of problem
Open-circuit in ignition primary circuit
-
Wave pattern characteristics
Top-right part of the build-up section can not be seen, and voltage value is approximately 2 volts too low.
Example 2 (Wave pattern during engine cranking)
-
Cause of problem
Malfunction in ignition power transistor
-
Wave pattern characteristics
Power voltage results when the ignition power transistor is ON.
