Retrieving Codes
- 1)
If use of an OBD-II type scan tool is not available, DTCs can be retrieved by changing MIL output from Mode 1 to Mode 2. Mode 1 is the normal malfunction warning mode. Mode 2 displays self-diagnostic results.
NOTE: Before switching MIL to Mode 2, perform bulb check (key on engine off). If MIL is inoperative, check and repair MIL circuit as necessary.
- 2) To switch MIL output from Mode 1 to Mode 2, locate the self-test harness connector. See Fig 1. Turn ignition on. Disconnect self-test harness connector and jump terminals No. 3 and 6 together. See Fig 1. Disconnect jumper wire after being connected for at least 2 seconds. MIL should now be in Mode 2. When in Mode 2 with engine off, MIL should begin flashing codes.
- 3) The 4-digit DTCs (flash codes) are read as two 2-digit numbers. The first 2-digit number is indicated by a series of long flashes followed by a series of short flashes (i.e. one long flash followed by 2 short flashes indicates DTC 0102). See Fig 2. The DTCs retrieved by MIL are not numerically the same as DTCs retrieved from a scan tool.
- 4) Write down DTCs and repair in order retrieved. To determine which circuit test to use, see MIL DTC (FLASH CODE) DIRECTORY . After retrieving DTCs or performing a repair, clear DTCs from PCM memory.