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 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)

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Intake Sensor






SYMPTOM: Intake sensor circuit is open or shorted. 24 or -24 is indicated on auto amp. as a result of conducting Self- diagnosis STEP 2.)




1. Check Intake Sensor Circuit Between Intake Sensor And Body Ground




2. Check Intake Sensor Circuit Between Intake Sensor And Auto AMP.(LCU)




3. Check Intake Sensor




4. Check Intake Sensor Circuit Between Ambient Sensor And Auto Amp.(LCU)