Use and Care Manual
19
the key on engine running (KOER).
Stored Codes are also known as “hard codes”, which are fault codes,
or trouble codes that have been stored in the vehicle computer memory
because the faults have reoccurred for more than a specified amount
of key-cycles. These codes will cause the control module to illuminate
the malfunction indicator light (MIL) when emission-related fault
occurs.
Pending Codes are also referred to as “maturing codes” or “continuous
monitor codes”. They indicate problems that the control module has
detected during the current or last driving cycle but are not considered
serious yet. Pending Codes will not turn on the malfunction indicator
lamp (MIL). If the fault does not occur within a certain number of
warm-up cycles, the code clears from memory.
Permanent Codes are DTCs that are "confirmed" and are retained in
the non-volatile memory of the computer until the appropriate monitor
for each DTC has determined that the malfunction is no longer present
and is not commanding the MIL on. Permanent DTC shall be stored in
non-volatile memory and may not be erased by any diagnostic services
or by disconnecting power to ECU.
1) Use UP/DOWN scroll button to select Read Codes from Diagnostic
Menu and press OK button (Figure 4- 1).
2) Use the UP/DOWN scroll button to select Stored Codes, Pending
Codes or Permanent Codes from the Read Codes menu and press
the OK button.
Figure 4- 3 Sample Read Codes Screen