Serial Link External Failure

Test 1:

Test 2 - 6:

Test 7 - 9:

SYMPTOM
SERIAL LINK EXTERNAL FAILURE

WHEN MONITORED
At ignition ON, after ignition ON during any rolling code handshake that occurs with the PCM due to a SKIM reset or a PCM reset, or during "Secret Key" transfers to the PCM.

SET CONDITION
This condition is set when the SKIM does not receive an expected bus message transmission acknowledgment from the PCM after 3 transmit attempts

POSSIBLE CAUSES
- PCM EEPROM DTC present
- Skim communication link failure
- Skim PCM failure
- Skim PCM problem
- Skim unidentified problem