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)

Or, hide this message: temporarily or permanently

Ignition Signal

IGNITION SIGNAL

Description
The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.

Step 1-3:




Component Function Check

Step 1:




Step 1 (Continued)-6:




Step 7-10:




Step 10 (Continued)-13:




Diagnosis Procedure

Step 1-2:




Step 2 (Continued):




Component Inspection (Ignition Coil with Power Transistor)

Step 1:




Component Inspection (Condenser)