No Gear Shift to 4th Gear
System Description
TCM does not shift to 4th gear under any of the following conditions.
Engine coolant temperature is less than 50 °C (122 °F).
A/T fluid temperature is less than 20 °C (68 °F).
TCM detects the following DTCs. (4th gear prohibition DTCs)
When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
Road test should be carried out with 2 persons, a driver and tester, on a level road.
The terminal number outside ( ) shows M13 engine model with VVT.
The terminal number in ( ) shows M13 engine model without VVT.
Step Action YES NO
Was A/T System Check performed?
Go to Step 2.
Check DTC.
Is DTC P0712, P0713, P0717, P0722, P0727, P0787, P0788, P0962, P0963, P0973, P0974, P0976, P0977, P1702, P1703, P1724, P1725, P1730, P1774, P1777 and/or P1895 detected?
Perform DTC flow table to repair and retry.
Go to Step 3.
Perform running test under the following conditions and measure voltage between terminal “E121-16” (or “E123-4”) of TCM connector and ground, terminal “E121-15” (or “E123-3”) of TCM connector and ground.
Engine coolant temperature is in normal operating temperature.
Select lever is in “D” range.
Drive vehicle with 4th gear condition referring to Automatic Gear Shift Table .
Voltage between TCM and ground
Voltage between terminal “E121-16” (or “E123-4”) of TCM connector and ground: 0 – 1 V
Voltage between terminal “E121-15” (or “E123-3”) of TCM connector and ground: 9 – 14 V
Do results satisfy the value as follows?
Faulty shift solenoid valve, circuit or transmission.
“BRN” circuit shorted to power circuit or open, or “BLK/YEL” circuit shorted to ground. If wire is OK, substitute a known-good TCM and recheck.