Alto CNG ECM Pinout

Engine and Emission Control System:

NOTE
• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition
switch is turned to ON position.
• Terminal No. with asterisk (*) cannot be measured with voltmeter because it is pulse signal. Use
oscilloscope for its check if necessary.
• For identification of each cylinder, refer to “Cylinder Identification Description”.