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DTC U2021 (87)

BME040200000W20

  Note

  • To warm up the engine completely, idle the engine and wait for 5 minutes or more.

DTC | U2021 (87) | Engine coolant temperature is 0 °C {32 °F} or less.
DETECTION CONDITION | • After engine is warmed up, engine coolant temperature is 0 °C {32 °F} or less, and TCS operation is inhibited by PCM. • DTC is not stored.
POSSIBLE CAUSE | • System is normal. When engine coolant temperature rises, TCS operation is executed by PCM.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | CHECK WHETHER ENGINE IS WARMED UP OR NOT • Is it engine warmed up? | Yes | Go to next step.
No | Warm up the engine. If TCS OFF light goes out, system is normal.
2 | VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER ENGINE IS WARMED UP • Warm up the engine. • Is TCS indicator light also illuminated and DTC C1118 (82) obtained? | Yes | Go to DTC C1118 (82) chart.
No | If TCS OFF light goes out, system is normal. If TCS OFF light does not go out, go to next step.
3 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from memory. (See Clearing DTCs Procedure) • Is the same DTC present? | Yes | Replace ABS/TCS HU/CM, go to next step.
No | Go to next step.
4 | VERIFY AFTER REPAIR PROCEDURE • Is there any DTC present? | Yes | Go to applicable DTC inspection.
No | Troubleshooting completed.