Check ECM performance
- Turn the ignition switch "OFF".
- Select "Vehicle scopemeter" in the menu, and connect channel A of GDS with FR terminal of Generator harness connector.
- Connect Channel B of GDS with C terminal of Generator harness connector.
- Engine start. And check the signal waveforms. (Compare the signal waveform of electrical loads ON with OFF)
Specification: Refer to SIGNAL WAVEFORM & DATA
- Is the measured signal waveforms of Generator normal?
YES
- Go to "Generator check "
NO
- Replace the ECM with an usable one and check for proper operation. If the problem is corrected, replace the ECM and then go to "Verification of Vehicle Repair ".