FixVault
Home
›
Toyota
›
2004
›
MR2 C56
›
Repair and Diagnosis
›
Engine Performance
›
System
›
Engine Controls - Diagnostics
›
DTC P1646: Transmission Control ECU Malfunction*
›
Typical Malfunction Thresholds
Typical Malfunction Thresholds
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
Threshold
Communication between ECM and transmission ECU
No communication