Symptom List:
P0600-SERIAL COMMUNICATION LINK
P0601-INTERNAL MEMORY CHECKSUM INVALID
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0600-SERIAL COMMUNICA-
TION LINK.
When Monitored and Set Condition:
P0600-SERIAL COMMUNICATION LINK
When Monitored: With the ignition on.
Set Condition: Internal Bus communication failure between the Engine and Transmis-
sion processors.
P0601-INTERNAL MEMORY CHECKSUM INVALID
When Monitored: With the ignition on.
Set Condition: Internal checksum for software failed, does not match calculated value.
POSSIBLE CAUSES
PCM INTERNAL OR SPI
TEST ACTION APPLICABILITY
1 The Powertrain Control Module is reporting internal errors, view repair to continue. All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
225
DRIVEABILITY - NGC
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