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

Test Notes

Enter this pinpoint test only when directed here.

This pinpoint test is intended to diagnose the following:
- Heated Oxygen Sensor (HO2S)/Heater
- Fuel Injector(s)
- HO2S Connections
- Harness Circuits: HO2S GND, HO2S, INJ 1-8, VPWR and SIG RTN
- Vacuum Systems
- Powertrain Control Module

CAUTION: Probing or piercing wiring insulation is not permitted and may allow water entry, causing corrosion and shorting which may result in HO2S failure.