With Manual Transmission

ON-BOARD DIAGNOSTICS LH3.2 MFI and EZ-129K DI

Each of the control modules incorporates Volvo Diagnostics, which continuously monitor the input and output signals. In the event of a fault which affects the exhaust emission levels, the Ignition Control Module (ICM) will activate the Malfunction Indicator Lamp (MIL) (also called Check engine lamp) on the combined instrument. Fault tracing may be carried out either with the Scan Tool (ST) or by means of the three test modes, which can be accessed through socket 2 Multi-port Fuel Injection (MFI) or socket 6 Distributor Ignition (DI) on Data Link Connector (DLC) "A".

Diagnostic test modes:
^ Mode 1 Displays Diagnostic Trouble Codes (DTCs) (if any are stored)
^ Mode 2 Acknowledges component operation
^ Mode 3 Operates components in a given, predetermined sequence