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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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ON-BOARD DIAGNOSTIC SYSTEM FAIL-SAFE FUNCTION [TCM (SJ6A-EL)]

Purpose/Function

  • If a transmission malfunction is detected by the malfunction detection function, the fail-safe function limits the transmission control.

  • Even if the transmission has a malfunction, the fail-safe function assures the minimum vehicle driveability.

Construction/Operation

DTC separate fail-safe function—: Not applicable

DTC No.

Description

Fail-safe function

P0601:00

TCM: ROM check sum error

  • Sets to emergency mode.

P0603:00

TCM: EEPRPM check sum error

—

P0604:00

TCM: RAM access error

  • Sets to emergency mode.

P0707:00

TR switch: Short circuit

  • When multiple position contact points are on, the selected position is determined by the following order of priority.

    • D>R>N (P)

  • When all of the position contact points are off, the D position is determined.

  • Inhibits learning control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the neutral control.

P0708:00

TR switch: Open circuit

  • When multiple position contact points are on, the selected position is determined by the following order of priority.

    • D>R>N (P)

  • When all of the position contact points are off, the D position is determined.

  • Inhibits learning control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the neutral control.

  • Inhibits the reverse control.

P0711:00

TFT sensor: Sensor malfunction

  • Performs control with the ATF temperature of 80 °C {176 °F}.

  • Inhibits learning control.

P0712:00

TFT sensor: Short to ground

  • Performs control with the ATF temperature of 80 °C {176 °F}.

  • Inhibits learning control.

  • Inhibits the neutral control.

  • Inhibits slip control.

  • Inhibits the slope control.

  • Inhibits AAS mode.

  • Inhibits 5GR and 6GR.

  • Inhibits direct mode.

  • Inhibits the torque increase request.

P0713:00

TFT sensor: Open circuit

  • Performs control with the ATF temperature of 80 °C {176 °F}.

  • Inhibits learning control.

  • Inhibits the neutral control.

  • Inhibits slip control.

  • Inhibits the slope control.

  • Inhibits AAS mode.

  • Inhibits 5GR and 6GR.

  • Inhibits direct mode.

  • Inhibits the torque increase request.

P0717:00

Turbine sensor: No signal input

  • Substitutes a turbine sensor signal for a signal from the VSS.

  • Inhibits learning control.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Inhibits slip control.

  • Inhibits the manual shift control.

  • Inhibits manual shifting using the up or down switch of the selector lever.

  • Inhibits AAS mode.

  • Inhibits 5GR and 6GR.

  • Inhibits direct mode.

P0722:00

VSS: No signal input

  • Substitutes a VSS signal for a signal from the turbine sensor.

  • Inhibits learning control.

  • Inhibits the neutral control.

  • Inhibits the reverse control.

  • Inhibits the slope control.

  • Inhibits slip control.

  • Inhibits the manual shift control.

  • Inhibits manual shifting using the up or down switch of the selector lever.

  • Inhibits AAS mode.

  • Inhibits 5GR and 6GR.

  • Inhibits direct mode.

P0751:00

Shift solenoid A: Stuck off

  • Inhibits learning control.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 4GR, 5GR, and 6GR.

  • Inhibits 1GR and 2GR during manual shift control.

  • Inhibits the slope control.

P0752:00

Shift solenoid A/shift solenoid D: Stuck on

  • Inhibits AAS mode.

  • Inhibits the slope control.

P0756:00

Shift solenoid B: Stuck off

  • Inhibits AAS mode.

  • Inhibits the slope control.

P0757:00

Shift solenoid B: Stuck on

  • Inhibits AAS mode.

  • Inhibits the slope control.

P0761:00

Shift solenoid C: Stuck off

  • Inhibits learning control.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits the slope control.

  • Inhibits accelerating from 2GR.

P0762:00

Shift solenoid C: Stuck on

  • Inhibits learning control.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 4GR, 5GR, and 6GR.

  • Inhibits 1GR and 2GR during manual shift control.

  • Inhibits the slope control.

P0766:00

Shift solenoid D: Stuck off

  • Inhibits learning control.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 4GR, 5GR, and 6GR.

  • Inhibits the slope control.

Shift solenoid G: Stuck on

P0781:00

1-2 shift valve

  • Inhibits learning control.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 4GR, 5GR, and 6GR.

  • Inhibits 1GR and 2GR during manual shift control.

  • Inhibits the slope control.

P0813:00

Reverse sequence valve

  • Inhibits learning control.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 6GR.

  • Inhibits the slope control.

P0819:00

M position switch up or down switch signal: Signal error
    M position switch signal error

  • Inhibits the manual shift control.

  • Inhibits manual shifting using the up or down switch of the selector lever.

  • Inhibits direct mode.

    Up switch malfunction or down switch signal error

  • Inhibits manual shifting using the up or down switch of the selector lever.

P0882:00

Power supply voltage: Low input

  • Inhibits learning control.

  • Sets to emergency mode.

P0961:00

Line pressure control solenoid signal: Solenoid stuck

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Sets to emergency mode.

P0962:00

Line pressure control solenoid signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Sets to emergency mode.

P0963:00

Line pressure control solenoid signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Sets to emergency mode.

P0969:00

Shift solenoid F: Solenoid stuck

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Sets to emergency mode.

P0970:00

Shift solenoid F signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Sets to emergency mode.

P0971:00

Shift solenoid F signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

  • Inhibits manual shifting using the up or down switch of the selector lever.

P0973:00

Shift solenoid A signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0974:00

Shift solenoid A signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0976:00

Shift solenoid B signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0977:00

Shift solenoid B signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0979:00

Shift solenoid C signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0980:00

Shift solenoid C signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0982:00

Shift solenoid D signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0983:00

Shift solenoid D signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0985:00

Shift solenoid E signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P0986:00

Shift solenoid E signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P2719:00

Shift solenoid G: Solenoid stuck

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P2720:00

Shift solenoid G signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P2721:00

Shift solenoid G signal: Short circuit

  • Inhibits learning control.

  • Inhibits the manual shift control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Sets to emergency mode.

P2757:00

TCC: Stuck off

  • Inhibits learning control.

  • Inhibits slip control.

P2758:00

TCC: Stuck on

  • Inhibits learning control.

  • Inhibits slip control.

  • Inhibits accelerating from 2GR.

P2762:00

TCC control solenoid signal: Solenoid stuck

  • Inhibits learning control.

  • Inhibits the TCC control and slip control.

  • Inhibits the neutral control.

  • Inhibits accelerating from 2GR.

P2763:00

TCC control solenoid signal: Short circuit

  • Inhibits learning control.

  • Inhibits the TCC control and slip control.

  • Inhibits the neutral control.

  • Inhibits accelerating from 2GR.

P2764:00

TCC control solenoid signal: Open/short circuit

  • Inhibits learning control.

  • Inhibits the TCC control and slip control.

  • Inhibits the neutral control.

  • Inhibits accelerating from 2GR.

U0073:00

CAN communication: Module communication error

  • Inhibits the manual shift control.

U0074:00

CAN communication: Module communication error (local CAN between TCM and PCM)

  • Inhibits learning control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

U0100:00

CAN communication: Communication error between PCM

—

U0115:00

CAN communication: Communication error between PCM (local CAN between TCM and PCM)

  • Inhibits learning control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits the TCC control and slip control.

  • Inhibits 5GR and 6GR.

  • Inhibits the neutral control.

  • Inhibits the slope control.

U0121:00

CAN communication: Communication error between DSC HU/CM

  • Inhibits learning control.

  • Inhibits direct mode.

  • Inhibits AAS mode.

  • Inhibits slip control.

U0131:00

CAN communication: Communication error between EPS control module

—

U0155:00

CAN communication: Communication error between instrument cluster

  • Inhibits the manual shift control.

  • Inhibits manual shifting using the up or down switch of the selector lever.

U0214:00

CAN communication: Communication error between start stop unit

  • Inhibits direct mode.

U0442:00

CAN communication: Error signal received from PCM

  • Throttle opening signal error

    • Inhibits learning control.

    • Inhibits direct mode.

    • Inhibits AAS mode.

    • Inhibits the TCC control and slip control.

    • Inhibits 5GR and 6GR.

    • Inhibits the neutral control.

    • Inhibits the slope control.

  • Accelerator opening angle signal error

    • Inhibits learning control.

    • Inhibits direct mode.

    • Inhibits AAS mode.

    • Inhibits the TCC control and slip control.

    • Inhibits 5GR and 6GR.

    • Inhibits the neutral control.

    • Inhibits the slope control.

  • Engine torque signal error

    • Inhibits learning control.

    • Inhibits AAS mode.

    • Inhibits slip control.

    • Inhibits 5GR and 6GR.

    • Inhibits the slope control.

  • Engine speed signal error

    • Inhibits learning control.

    • Inhibits direct mode.

    • Inhibits AAS mode.

    • Inhibits the TCC control and slip control.

    • Inhibits 5GR and 6GR.

    • Inhibits the neutral control.

    • Inhibits the slope control.

  • Engine coolant temperature signal error

    • Performs control with the ATF temperature of 80 °C {176 °F}.

    • Inhibits AAS mode.

    • Inhibits slip control.

    • Inhibits the neutral control.

    • Inhibits the slope control.

  • Detects engine misfire

    • Inhibits learning control.

    • Inhibits direct mode.

    • Inhibits AAS mode.

    • Inhibits the TCC control and slip control.

    • Inhibits 5GR and 6GR.

    • Inhibits the slope control.
Emergency Mode

  • Emergency mode shifts as follows when in D or R position.

Condition

Selector lever position

D position

R position

Normal shifting

1GR

2GR

3GR

4GR

5GR

6GR

Reverse

When there is any malfunction in shift solenoids A, B, C, D, E, F, G, or line pressure control solenoid

4GR

Reverse
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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