FAIL-SAFE FUNCTION[GF4AX-EL]


id050204100600

•  In the fail-safe function, minimum vehicle driveability is obtained by changing the signals that are determined to be irregular by the malfunction detection function to the preset values, and limiting PCM control.

DTC No.

On-board diagnostic function

Detection condition

Fail-safe

TCC

P0500
Vehicle speed signal circuit malfunction
•  No vehicle speed signal is input to PCM when and engine coolant temperature is 60 °C {140 °F} or more, input/turbine speed sensor signal is 1,050 rpm or more and selector lever position is at D, 2, or 1 range.
•  PCM calculation from input/turbine speed sensor signal
Enabled
P0705
Transaxle range (TR) switch circuit malfunction (short to ground)
•  Two or more range signals are input from TR switch for 100 s or more.
•  The range position is assumed to be in D range and normal shift pattern is performed.
Enabled
P0706
Transaxle range (TR) switch circuit malfunction (open circuit)
•  No transaxle range signal is input to PCM when and engine speed is 530 rpm or more, vehicle speed is 20 km/h {12 mph} or more and selector lever position is at R, D, 2, or 1 range.
•  Gear position is fixed in 1GR when driving at under 6 km/h {3.7 mph} or in 3GR when driving at over 6 km/h {3.7 mph} if either of the following conditions arises:
―  The R position switch and D, 2,or 1 range switch are on at the same time.
―  The TR switch does not output any signals.
Enabled
P0711
Transaxle fluid temperature (TFT) sensor circuit range/performance (stuck)
•  Fluctuation value of TFT sensor output voltage to PCM terminal 1U is 20 °C {68 °F} or less (3.6 V or more) when vehicle is driven for 150 s or more at vehicle speed between 25—59 km/h {15—36 mph}, then 60 km/h {37 mph} or more for 100 s or more.
N/A
Enabled
P0712
Transaxle fluid temperature (TFT) sensor circuit malfunction (short to ground)
•  Input voltage from the TR switch to PCM terminal 1U is 0.09 V or less.
•  Maximizes line pressure
•  Expand the lockup range
Enabled
P0713
Transaxle fluid temperature (TFT) sensor circuit malfunction (open circuit)
•  Input voltage from the TR switch to PCM terminal 1U is 4.9 V or more when the vehicle speed is 20 km/h {12 mph} or more.
 
Enabled
P0715
Input/turbine speed sensor circuit malfunction
•  No input/turbine speed sensor signal to PCM terminals 1M and 1Q when vehicle speed is 41 km/h {25 mph} or more and selector lever position is at D, 2, or 1 range.
•  Shift control is performed according to vehicle speed signal
•  Inhibits 4GR
Disabled
P0731
Gear 1 incorrect (incorrect gear ratio detected)
•  Revolution ratio of input/turbine speed sensor to vehicle speed signal is 75 or less while in 1GR.
N/A
Enabled
P0732
Gear 2 incorrect (incorrect gear ratio detected)
•  Revolution ratio of input/turbine speed sensor to vehicle speed signal is 44 or less or 75 or more while in 2GR.
N/A
Enabled
P0733
Gear 3 incorrect (incorrect gear ratio detected)
•  Revolution ratio of input/turbine speed sensor to vehicle speed signal is 29 or less or 44 or more while in 3GR.
N/A
Enabled
P0734
Gear 4 incorrect (incorrect gear ratio detected)
•  Revolution ratio of input/turbine speed sensor to vehicle speed signal is 29 or more while in 4GR.
N/A
Enabled
P0741
Torque converter clutch (TCC) stuck off
•  Difference between engine speed and turbine speed more than 100 rpm while in 4GR and TCC operation.
N/A
Enabled
P0743
Torque converter clutch (TCC) control solenoid valve circuit malfunction
•  If voltage is stuck at 0 V or B+ in TCC control solenoid valve control terminal 65 of the PCM when the solenoid valve operates according to PCM calculation.
•  Maximizes line pressure
Disabled
P0745
Pressure control solenoid valve circuit malfunction
•  If voltage is stuck at 0 V or B+ in pressure control solenoid control valve control terminal 91 of the PCM when the solenoid valve operates according to PCM calculation.
•  Pressure control solenoid valve operation is stopped and line pressure held at maximum
Disabled
P0753
Shift solenoid A circuit malfunction
•  If voltage is stuck at 0 V or B+ in shift solenoid A control terminal 92 of the PCM when the solenoid valve operates according to PCM calculation.
•  If one or two shift solenoid valves develop a malfunction, remaining normal shift solenoid valves are controlled to prevent loss of driveability as much as possible
•  If all shift solenoid valves develop malfunctions, then operation of all shift solenoid valves is stopped, and if in D or 2 range, then fixed in 3rd gear, or if in 1 range, then fixed in 1st gear
Disabled
P0758
Shift solenoid B circuit malfunction
•  If voltage is stuck at 0 V or B+ in shift solenoid B control terminal 66 of the PCM when the solenoid valve operates according to PCM calculation.
Disabled
P0763
Shift solenoid C circuit malfunction
•  If voltage is stuck at 0 V or B+ in shift solenoid C control terminal 40 of the PCM when the solenoid valve operates according to PCM calculation.
Disabled
P0768
3-2 timing solenoid valve circuit malfunction
•  If voltage is stuck at 0 V or B+ in 3-2 timing solenoid valve control terminal 39 of the PCM when the solenoid valve operates according to PCM calculation.
•  Operation of 3-2 timing solenoid valve is stopped
Disabled
P1783
ATF overheating
•  ATF temperature is 138 °C {280 °F} or more.
N/A
Enabled