Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Engine Control Module: Testing and Inspection

25 Position ECU Plug:

For Terminal ID please refer to "Computers and Control Systems : Engine Control Module : Diagrams". Connector Views

Y = Yellow ECU
B = Black/Blue ECU

Grounds
* Good chassis ground.

Battery Supply

Main Relay Supply

Reference Supply

Injector Supply

Coolant Temperature Sensor

Air Temperature Sensor

Throttle Position Sensor

Air Mass Meter

Fuel Pump Relay

Air Conditioner Control

EGR Temperature Sensor

Transmission Switch

Oxygen Sensor

Start Signal

Air Induction Relay

EGR Solenoid Vacuum Valve

Purge Vale

Air Supplement Valve