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Home >> Mazda >> 2019 >> CX-9 Signature >> Repair and Diagnosis >> Transmission >> Transfer Case >> On-Board Diagnostics - AWD System >> DTC U0402-68: Signal Error From TCM [Electronic AWD Control System] >> Notes
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DTC U0402-68: Signal Error From TCM [Electronic AWD Control System]: Notes

DTC U0402:68 (ELECTRONIC AWD CONTROL SYSTEM) DETECTION CONDITION AND POSSIBLE CAUSE

DTC U0402:68 Signal error from TCM
Detection condition
  • The instrument cluster received error signals from the transaxle for 5 s with the ignition switched ON (engine off or on).
FAIL-SAFE FUNCTION
Possible cause
  • The transaxle could not send a normal signal temporarily. (DTCs are stored in the TCM.)
  • TCM malfunction
  • Instrument cluster malfunction
SYSTEM WIRING DIAGRAM -