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Fail-Safe Table
This function is provided by the safe mechanism that assures safe driveability even when the solenoid valve, sensor or
its circuit fails. The following table shows the fail-safe function for each fail condition of sensor, solenoid or its circuit.
DTC No.
Transmission range sensor or
its circuit
P0705
34
Transmission fluid temperature
sensor or its circuit
36
P0710
38
Input shaft speed sensor or its
circuit
P0715
14
Output shaft speed sensor or
its circuit
P0720
31
Engine speed signal circuit
P0725
35
TCC solenoid valve or its
circuit
25
P0743
26
41
Pressure control solenoid
P0748
42
valve or its circuit
21
Shift solenoid-A valve or its
P0753
22
circuit
23
Shift solenoid-B valve or its
P0758
24
circuit
Timing solenoid valve or its
P0785
13
circuit
Trouble area
• Selected range is set as range shown below.
• Lock-up function is inhibited to operate.
• Reverse control operation, which inhibit reverse driving at
• Learning control is inhibited.
• A/T fluid temperature is assumed to be 200 °C (392 °F).
• Upshifting to O/D is inhibited.
• Lock-up function is inhibited to operate.
• Learning control is inhibited.
• Upshifting to O/D is inhibited.
• Lock-up function is inhibited to operate.
• Line pressure control at gear shifting is inhibited.
• Torque reduction control, which request ECM to reduce to
• Learning control is inhibited.
• Vehicle speed which is calculated by input shaft speed
• Upshifting to O/D is inhibited.
• Lock-up function is inhibited to operate.
• Line pressure control at gear shifting is inhibited.
• Torque reduction control, which request ECM to reduce to
• Learning control is inhibited.
• Upshifting to O/D is inhibited.
• Line pressure control at gear shifting is inhibited.
• Torque reduction control, which request ECM to reduce to
• Learning control is inhibited.
• Lock-up function is inhibited to operate.
• Lock-up function is inhibited to operate.
• When TCC solenoid circuit is shorted to power circuit and
• Power supply for all solenoid valves is cut.
• Gear position is fixed in 3rd gear.
• Torque reduction control, which request ECM to reduce to
• Learning control is inhibited.
• Power supply for all solenoid valves is cut.
• Gear position is fixed in 3rd gear.
Automatic Transmission/Transaxle:
Fail-safe operation
– In case of circuit open, selected range is assumed to be
"D" range.
– In case of circuit short, selected range is set in priority
order shown below.
D> 2> L> R> N> P
"R" range while vehicle runs forward more than 11 km/h (7
mile/h), is inhibited.
generate torque, is inhibited.
sensor signal is used for gear shifting control instead of
vehicle speed calculated by output shaft speed sensor /
VSS signal.
generate torque, is inhibited.
generate torque, is inhibited.
vehicle speed is slower than 15 km/h (9 mile/h), gear
position is fixed in 1st gear for prevention of engine stall.
generate torque, is inhibited.
5A-25
S3RH0A5104008
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