Operation CHARM: Car repair manuals for everyone.
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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Ohms Measurements



CAUTION: WHEN MEASURING OHMS DISCONNECT THE ECU FROM THE HARNESS PLUG AND NEVER TURN THE IGNITION KEY ON. IT IS P0SSIBLE THAT FAILURE TO FOLLOW THESE STEPS WILL RESULT IN DAMAGE TO THE ECU.




Grounds




Coolant Temperature Sensor




Air Temperature Sensor




Throttle Switch




Air Flow Sensor
1 Flap on air flow sensor closed or air flow sensor plate at rest position. Resistance increases as flap or plate opens.
2 Flap on air flow sensor opened to maximum or air flow plate deflected to maximum.




ISC Valve




Injector Group(s)




Single Injector