Codes are displayed by the MIL flashing ON and OFF.
The time duration of the flash identifies the significance of the digit. Three
flash durations are used:
- A flash duration of 0.5 seconds indicates no malfunction (OK).
- A flash duration of 1.3 seconds indicates that it is a 10's digit.
- A flash duration of 0.2 seconds indicates that it is a 1's digit.
For example, if 3 flashes — 1.3 seconds long — are
followed by 4 flashes — 0.2 seconds long — a
Code 34 is indicated. These code sequences are separated by 1.8 seconds to avoid
confusing tens and ones digits.
- Read Memory Mode: used to pull codes which have been stored
in memory. It is most effective in detecting poor contact of wiring harness
connectors. To enter this mode, connect the read memory connector with the
ignition ON.
- D Mode: used to diagnose and test the entire injection system.
To enter this mode connect the test mode connector with the ignition ON.
On the Legacy and SVX, the ignition must be ON with the engine
running.
- F-Check Mode: used to measure the performance characteristics
of the injection system components. When working in this mode, a Select Monitor
or equivalent scan tool is required.
- U Check Mode: operates during normal engine operation. It signals
the driver using the MIL only when components necessary for start-up and drive
are faulty. The read memory and test connectors must be disconnected with
the ignition ON for this mode to be operational.
