DTC P1768 will set when TCM senses less than 3 volts at transmission control relay output (switched battery) terminals at TCM, prior to TCM energizing relay.
Possible Cause
Low battery voltage.
Open fused B+ circuit to transmission control relay.
Open ground circuit.
Transmission control relay output circuit shorted to ground.
Open transmission control relay circuit.
Defective transmission control relay.
Malfunctioning TCM.
DTC P0736 will set if ratio of input RPM to output RPM does not match given gear ratio.
Possible Cause
Low battery voltage.
Reverse pressure less than 180 psi (12.7 kg/cm2 ).
Leaking L-R seals.
L-R switch valve stuck in 1st gear position
DTC P0731 will set if ratio of input RPM to output RPM does not match given gear ratio.
Possible Cause
Low battery voltage.
UD and L-R pressures less than 95 psi (13.7 kPa) at 2000 RPM.
Delayed 1st or Reverse engagement.
Coasting to stop downshift bump.
UD and L-R clutch volume indexes out of specifications.
UD pressure is less or greater than 5 psi (.73 kPa) in 4th gear.
Leaking L-R seals.
Faulty L-R accumulator seals.
Stuck L-R switch valve.
Faulty UD accumulator seals.
DTCs P0720 will set if there is an excessive change in output RPM in any gear. DTC sets as a one trip fault and will take 5 minutes of substituted operation before transaxle is in limp-in mode.
Possible Cause
Open input speed sensor ground circuit.
Damaged ignition wiring.
Open input speed sensor signal circuit.
Malfunctioning sensor.
Sensor shorted to ground.
Malfunctioning TCM.
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Saturday, October 16th, 2010 AT 5:18 PM
