ON-BOARD DIAGNOSTIC SYSTEM FAIL-SAFE FUNCTION [TCM (EW6A-EL)]SM2760147
ON-BOARD DIAGNOSTIC SYSTEM FAIL-SAFE FUNCTION [TCM (EW6A-EL)]

id0502p7280200


Purpose/Function

• If a transaxle malfunction is detected by the malfunction detection function, the fail-safe function limits the transaxle control.
• Even if the transaxle has a malfunction, the fail-safe function assures the minimum vehicle driveability.

Construction/Operation

DTC separate fail-safe function

DTC No.

Description

Fail-safe function

P0218:00
Automatic transaxle protection control
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
• Limits engine torque.
P0500:00
Vehicle speed signal circuit malfunction
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0666:00
ECU internal temperature sensor circuit malfunction
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P0667:00
ECU internal temperature sensor/performance problem
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P06B8:00
NVRAM malfunction
Not applicable
P0706:00
Transaxle range sensor range/performance problem
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0707:00
Transaxle range sensor circuit low input
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0708:00
Transaxle range sensor circuit high input
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0711:00
TFT sensor range/performance problem
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P0712:00
TFT sensor circuit low input
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P0713:00
TFT sensor circuit high input
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P0715:00
Turbine/input shaft speed sensor/sensor output range malfunction
• Set to TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
• Inhibits 5GR and 6GR.
• Inhibits shift down when the accelerator pedal is depressed.
P0716:00
Turbine/input shaft speed sensor range/performance problem
• Set to TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
• Inhibits 5GR and 6GR.
• Inhibits shift down when the accelerator pedal is depressed.
P0717:00
Open circuit in turbine/input shaft speed sensor circuit
• Set to TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
• Inhibits 5GR and 6GR.
• Inhibits shift down when the accelerator pedal is depressed.
P0720:00
Output shaft speed sensor range/performance problem
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0721:00
Output shaft speed sensor/sensor output range malfunction
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0722:00
Open circuit in output shaft speed sensor circuit
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0729:00
6GR incorrect ratio
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0731:00
1GR incorrect ratio
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0732:00
2GR incorrect ratio
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0733:00
3GR incorrect ratio
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0734:00
4GR incorrect ratio
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0735:00
5GR incorrect ratio
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0736:00
Gear reverse incorrect ratio
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P073D:00
Neutral incorrect ratio
Not applicable
P0741:00
TCC control solenoid stuck off
• Inhibits TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0743:00
TCC control solenoid circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0746:00
Pressure control solenoid stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0748:00
Pressure control solenoid circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0751:00
Shift solenoid No.1 stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0752:00
Shift solenoid No.1 stuck on
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0753:00
Shift solenoid No.1 circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0756:00
Shift solenoid No.2 stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0757:00
Shift solenoid No.2 stuck on
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0758:00
Shift solenoid No.2 circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0761:00
Shift solenoid No.3 stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0762:00
Shift solenoid No.3 stuck on
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0763:00
Shift solenoid No.3 circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0766:00
Shift solenoid No.4 stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0767:00
Shift solenoid No.4 stuck on
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0768:00
Shift solenoid No.4 circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0771:00
On/off solenoid stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0772:00
On/off solenoid stuck on
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0773:00
On/off solenoid circuit malfunction
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0780:00
Gear shifting malfunction
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0819:00
M position switch/Up switch/Down switch signal error
• Inhibits manual mode.
P0842:00
Oil pressure switch No.1 (Oil pressure switch B) stuck on
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0843:00
Oil pressure switch No.1 (Oil pressure switch B) stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0847:00
Oil pressure switch No.2 (Oil pressure switch A) stuck on
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0848:00
Oil pressure switch No.2 (Oil pressure switch A) stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0872:00
Oil pressure switch No.3 (Oil pressure switch A) stuck on
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0873:00
Oil pressure switch No.3 (Oil pressure switch A) stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0877:00
Oil pressure switch No.4 (Oil pressure switch B) stuck on
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0878:00
Oil pressure switch No.4 (Oil pressure switch B) stuck off
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0882:00
TCM power supply voltage low
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0883:00
TCM power supply voltage high
• Set to emergency mode.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P0C2C:00
Electric AT oil pump mechanical malfunction
• Inhibits i-stop control.
P0C2D:00
Electric AT oil pump rotation malfunction
• Inhibits i-stop control.
P1728:00
Clutch slippage
• Inhibits malfunctioning gear.
• Limits engine torque.
• Maximizes the line pressure.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P1738:00
Automatic transaxle internal malfunction
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
P1784:00
Hi cut valve stuck off/R-3-5 cut valve stuck on
• Inhibits malfunctioning gear.
• Limits engine torque.
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
P181F:00
Electric AT oil pump/Electric AT oil pump relay circuit malfunction
• Inhibits i-stop control.
P2530:00
Ignition switch stuck off
Not applicable
P2712:00
Oil pump shift valve stuck
• Inhibits i-stop control.
P2855:00
Low clutch hydraulic circuit/sealing malfunction
Not applicable
U0073:00
CAN system communication error (HS CAN)
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
U0074:00
CAN system communication error (local CAN between TCM and PCM)
• Set to TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
• Inhibits 5GR and 6GR.
• Inhibits shift down when the accelerator pedal is depressed.
U0100:00
Communication error to PCM (HS CAN)
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
U0115:00
Communication error to PCM (local CAN between TCM and PCM)
• Set to TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
• Inhibits 5GR and 6GR.
• Inhibits shift down when the accelerator pedal is depressed.
U0121:00
Communication error to DSC HU/CM
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits AAS.
U0131:00
Communication error to Electric Power Steering (EPS) control module
• Inhibits learning control.
• Inhibits neutral idle control.
• Inhibits i-stop control.
U0155:00
Communication error to instrument cluster
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
U0214:00
Communication error to start stop unit
• Inhibits direct mode.
U0442:00
Invalid data received from PCM (local CAN between TCM and PCM)
• Set to TCC control.
• Inhibits learning control.
• Inhibits manual mode.
• Inhibits neutral idle control.
• Inhibits i-stop control.
• Inhibits 5GR and 6GR.
• Inhibits shift down when the accelerator pedal is depressed.


Emergency mode

• The emergency mode is a control for preventing transaxle damage or vehicle inoperability.
• If these modes are set, the TCM output is inhibited. Therefore, all solenoids are turned off and the following conditions occur:
― When the accelerator pedal is depressed, the engine speed is higher than normal.
― When N to D position and N to R position are selected, the shift shock is greater than during normal shifting.


Neutral idle control

• System which automatically switches the transaxle to neutral internally while the vehicle is stopped in the D position.