Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Volvo >> 1993 >> 940 Base, 4D Sedan, AW70L >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Controls - Tests W/Codes) >> Self-Diagnostic System >> Retrieving Codes >> Notes

Retrieving Codes: Notes

WARNING: This page is about a different car, the 1994 Volvo 960. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Never disconnect or connect ECU connector with ignition switch in ON position. Ensure ignition is off and fuse No. 24 is removed.

ECU is equipped with diagnostic functions in form of self-diagnostics (Test Mode No. 1), function testing (Test Mode No. 2) and control testing (Test Mode No. 3). Access to diagnostic system is provided by socket No. 2 on diagnostic unit with ignition on.

scientia non olet · About Mike's Workshop Manuals