Improper Ratio
Symptom:IMPROPER RATIO
When Monitored and Set Condition
When Monitored: Engine rpm greater than 450 rpm, output speed greater than 180 rpm, no N2 - N3 input speed sensor errors present, no gear selector lever errors present, no ABS system errors, and all wheel speeds above 450 rpm.
Set Condition: No shifting operation and detected gear is not the actual gear No shifting operation - detected (calculated) gear is less than actual(expected) gear or no plausible gear is calculated or Actual turbine speed - calculated turbine speed > 300 rpm or calculated transmission ratio is above threshold. During an Upshift - detected (calculated) gear is less than actual(expected) gear-1. During Downshift - detected (calculated) gear is less than actual (expected) gear
POSSIBLE CAUSES
- TRANSMISSION MECHANICAL PROBLEM
- TCM - IMPROPER RATIO
Test 1:
