Specifications

AISIN AUTOMATIC TRANSAXLE 5A2 – 45
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0604
INTERNAL TRANSMISSION CONTROL MODULE (TCM)
RANDOM ACCESS MEMORY (RAM) ERROR
Conditions for Setting the DTC
S The Transmission Control Module (TCM) cannot
carry out the four RAM initialization routines.
S TCM detects that the RAM cannot be written and
read correctly.
Action Taken When the DTC Sets
S TCM will request the illumination of MIL and store
DTC when TCM detects failures on two consecu-
tive ignition cycle.
Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
Cause of Failure
S Harness or connector between TCM and ECM
S ECM
S TCM