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
Using OBD II Scan Tool (Excluding Toyota Hand-Held Tester)
CIRCUIT DESCRIPTION When the air conditioning operates (increased engine load), battery positive voltage is applied to terminal A/C of the ECM (
A/C signal).
The ECM then controls the Idle Air Control
(IAC) valve to increase the
idle speed while the
A/C signal is input to the ECM, thus maintaining driveability.
WIRING DIAGRAM INSPECTION PROCEDURE
