DTC U0300:00, U0300:01, U0300:02 [MZI-3.7 (PCM CONNECTOR (3 TYPES))]

id0102e4337900

DTC U0300:00

DTC U0300:01

DTC U0300:02

U0300:00: Internal control module software incompatibility

U0300:01: Internal control module software incompatibility (general electrical failure)

U0300:02: Internal control module software incompatibility (general signal failure)
DETECTION CONDITION
•  This DTC indicates there are incompatible software levels within the PCM that control the drive-by wire control system. The drive-by wire control system uses multiple microprocessors within the PCM, each having its own software level and function. The microprocessors must have the correct level of software in order to communicate and function together.
POSSIBLE CAUSE
•  PCM calibration level

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE OR STORED DTCS
•  Turn the ignition switch off, then to the ON position (engine off).
•  Verify related PENDING CODE or stored DTCs.
•  Are any DTCs present other than the following:
―  P0600:00, P060A:00, P060B:00, P060C:00, P061B:00, P061C:00, P061D:00, P1674:00, U0300:00, U0300:01, or U0300:02?
Yes
Go to the appropriate DTC troubleshooting procedures.
(See DTC TABLE [MZI-3.7 (PCM CONNECTOR (3 TYPES))].)
No
Go to the next step.
4
INSPECT PCM FOR LATEST CALIBRATION
•  Program the PCM to the latest calibration.
•  Turn the ignition switch off, then to the ON position (engine off). Repeat this 2 times.
•  Idle the engine.
•  Verify PENDING CODE or stored DTCs.
•  Is the same DTC present?
Yes
Go to the next step.
No
Troubleshooting completed.
5
INSPECT FOR CORRECT PCM OPERATION
•  Disconnect all the PCM connectors.
•  Visually inspect for:
―  Pushed out pins
―  Corrosion
•  Connect all the PCM connectors and verify that they seat correctly.
•  Retrieve DTCs using the M-MDS.
•  Is the same DTC present?
Yes
Go to the next step.
No
Go to the next step.
(The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.)
6
VERIFY TROUBLESHOOTING OF DTC U0300:00, U0300:01, U0300:02 HAVE BEEN COMPLETED
•  Verify that all disconnected connectors are reconnected.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the KOEO or KOER self-test.
•  Is the PENDING CODE for this DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7 (PCM CONNECTOR (3 TYPES))].)
No
Troubleshooting completed.