P0731

Test 1 Through 3:

Test 4 Through 5:

Symptom:
P0731-GEAR RATIO ERROR IN 1ST

When Monitored and Set Condition:
P0731-GEAR RATIO ERROR IN 1ST

When Monitored:
The transmission gear/speed ratio is monitored continuously while the transmission is in gear.

Set Condition:
Code P0731 is set if the ratio of the input RPM to the output RPM does not match the given gear ratio.

POSSIBLE CAUSES
CHECKING SYMPTOMS AND POSSIBLE CAUSES
LOW BATTERY VOLTAGE
INTERMITTENT CODE P0731

Test 1 Through 2:

Test 3 Through 6:

Test 7 Through 12:

Test 13 Through 14:

Symptom:
ADDITIONAL GEAR RATIO ERROR IN 1ST (P0731)

POSSIBLE CAUSES
UD AND L-R PRESSURES < 95 PSI AT 2000 RPM
CUST COMP DELAYED 1ST OR REV ENGAGE/COAST DOWN STOP BUMP
UD AND L-R CLUTCH VOLUME INDEXES OUT OF SPEC
UD PRESSURE < 5 PSI IN 4TH GEAR
TRANSAXLE REPAIR (L-R SEALS)
L-R ACCUM SEALS DAMAGED
L-R SWITCH VALVE STUCK IN REV
UD ACCUMULATOR SEALS DAMAGED
TRANSAXLE DEFECT(UD SEALS)
TRANSAXLE SEALS ARE DEFECTIVE
UD PRESSURE > 5 PSI IN 4TH GEAR
L-R SWITCH VALVE STUCK IN FIRST GEAR POSITION