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

Quick Test 5.0B - Switch Monitor Test

1. Key OFF.
2. Check that the following LED's are illuminated:
2C Memory Power.
2M Malfunction Code.
2P Check Connect.

NOTE: Other LED's may also be illuminated if an input is under the right condition. For example: If the coolant temperature is above 72° C (162° F), then the LED for the coolant will be on.

3. Go to Part 5.OC.