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

Diagnostics By Service Code and Symptom

Diagnostics By Service Code And Symptom:






NOTE: During EEC Self-Test, were any codes recorded? If YES, See Powertrain Management/Computers and Control Systems/System Diagnosis/Testing and Inspection Procedures/Diagnostic Trouble Code Charts and Descriptions for code definition. Testing and Inspection If there were Ignition Diagnostic Monitor (IDM) codes, GO to the appropriate IDM pinpoint test. Pinpoint Test Diagnostics

If the tachometer is not functioning, no fault memory LEDs were captured by the DIST, and no IDM EEC Self-Test codes were recorded, refer to Powertrain Management/System Diagnosis/Testing and Inspection Procedure/Diagnostic Routines (Diagnosis By Symptom). Testing and Inspection