DTC P0604 [SJ6A-EL]

id050208800800

DTC P0604

RAM malfunction
DETECTION CONDITION
•  RAM (in TCM) read/write error is detected.
Diagnostic support note:
•  The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.
•  The AT warning light illuminates if the TCM detects the above malfunction condition during the first drive cycle.
•  PENDING CODE is not available.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded on the repair order?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•  If the vehicle is not repaired, go to the next step.
No
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)
3
VERIFY TROUBLESHOOTING OF DTC P0604 COMPLETED
•  Make sure to reconnect all the disconnected connectors.
•  Clear the DTC using the M-MDS.
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine.
2.  Warm-up the engine and transmission.
3.  Drive the vehicle in D range and make sure that the gears shift smoothly from 1GR to 6GR.
•  Is the same DTC present?
Yes
Replace the TCM, then go to the next step.
(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)
No
Go to the next step.
4
VERIFY NO DTC HAS BEEN PRESENTED
•  Perform the “Reading DTCs Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SJ6A-EL].)
No
DTC troubleshooting completed.