Operation CHARM: Car repair manuals for everyone.
Home >> Jaguar >> 1990 >> Sovereign L6-4.0L >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Reading and Clearing Diagnostic Trouble Codes
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

Reading and Clearing Diagnostic Trouble Codes



Notes Regarding Diagnostic Trouble Codes (DTC's)

The Control unit used in the Air Conditioning system does not have On-Board Diagnostic capabilities and, consequently, does not store diagnostic trouble codes (DTC's)!

Conventional system checks can be conducted using the following input/output index, at the control unit connector.

Climate Control Inputs/Outputs - Part 1 of 2:




Climate Control Inputs/Outputs - Part 2 of 2:





For additional information pertaining to the index refer to "Heating and Air Conditioning : Diagrams : Electrical. Electrical Diagrams
pro multis · About Operation CHARM