Part 2

Inspection of ECM and Its Circuits



Generator Control Signal and Generator Field Coil Monitor Signal

Generator field coil monitor signal (1):





Generator control signal (2):





Measurement condition

- Engine: Idle speed after warm-up
- Lighting switch: OFF
- A/C switch: OFF
- Blower speed selector: OFF
- Rear defogger switch: OFF





Measurement condition

- Engine: Idle speed after warm-up
- Lighting switch: ON
- A/C switch: ON
- Blower speed selector: 4th position or higher
- Rear defogger switch: ON






HO2S Signal and HO2S Heater Signal

HO2S signal (1):





HO2S heater signal (2):





Measurement condition

- Engine: Idle speed after warm-up





Measurement condition

- Engine: Racing after warm-up











Ignition Coil Signal





Measurement condition

- Engine: Idle speed after warm-up






MAF Sensor Signal





Measurement condition

- Engine: Idle speed after warm-up











A/F Sensor Heater Signal





Measurement condition

- Engine: Idle speed after warm-up











OCV Signal





Measurement condition

- Engine: Idle speed immediately after start-up






A/F Sensor Signal





Measurement condition

- Engine: Racing after warm-up











IMT Vacuum Solenoid Valve Signal





Measurement condition

- Engine: Racing after warm-up











Throttle Actuator Signal





Measurement condition

- Ignition switch: ON
- Accelerator pedal: Idle position





Measurement condition

- Ignition switch: ON
- Accelerator pedal: Fully depressed position






CKP Sensor Signal and CMP Sensor Signal

CMP sensor signal (1):





CKP sensor signal (2):





Measurement condition

- Engine: Idle speed after warm-up






Knock Sensor Signal





Measurement condition

- Engine: Running at 4,000 rpm after warmed up






Fuel Pump Relay Signal





Measurement condition

- Ignition switch: OFF -> ON -> START











IMRC Valve Motor Signal





Measurement condition

- Engine: When engine is cool and running at idle speed





Measurement condition

- Engine: Idle speed after warm-up






CAN Communication Signal

CAN communication signal (High) (1):





CAN communication signal (2):





Measurement condition

- Engine: Stop
- Ignition switch: ON






EVAP Leak Detection Pump Signal





Measurement condition

- Ignition switch: ON





Measurement condition

- EVAP canister air (vent) valve: Operated (using active test of SUZUKI scan tool)