DTC P0603:00 [MZI-3.7 (PCM CONNECTOR (3 TYPES))]
id0102e4314700
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DTC P0603:00 |
PCM keep alive memory (KAM) error |
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DETECTION CONDITION
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• Indicates the PCM has experienced an internal memory concern. However, there are external items that can cause this DTC.
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POSSIBLE CAUSE
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• Battery terminal corrosion
• Loose battery connection
• Connector or terminal malfunction
• Open circuit between battery positive terminal and PCM terminal 1V
• Reprogramming
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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INSPECT BATTERY TERMINALS FOR POOR CONNECTION
• Turn the ignition switch off.
• Inspect for poor connection and corrosion.
• Are there any malfunction?
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Yes
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Repair or replace suspected part, then go to Step 7.
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No
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Go to the next step.
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4
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INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace suspected part, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT MONITOR CIRCUIT FOR OPEN CIRCUIT
• PCM connector is disconnected.
• Turn the ignition switch off.
• Disconnect the battery cables.
• Inspect the continuity between battery positive terminal (wiring harness-side) and PCM terminal 1V (wiring harness-side).
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace suspected part, then go to Step 7.
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6
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INSPECT FOR CORRECT PCM OPERATION
• Disconnect all the PCM connectors.
• Visually inspect for:
• Connect all the PCM connectors and verify that they seat correctly.
• Retrieve DTCs using the M-MDS.
• Is the PENDING CODE for this DTC present?
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Yes
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Go to the next step.
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No
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The system is correctly. Go to the next step.
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7
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VERIFY TROUBLESHOOTING OF DTC P0603:00 HAS BEEN COMPLETED
• Verify that all disconnected connectors are reconnected.
• Turn the ignition switch to the ON position (Engine off).
• Clear the DTC from the PCM memory using the M-MDS.
• Perform the KOEO or KOER self-test.
• Retrieve DTCs using the M-MDS.
• Is the PENDING CODE for this DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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8
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Troubleshooting completed.
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