Fail-Safe Operation

FAIL-SAFE CODES

If any of the following codes is recorded, the Engine Control Module enters fail-safe mode and substitutes predetermined values to replace incorrect sensor inputs.

Data Trouble Code No. 14

FAIL-SAFE OPERATION:
Fuel cut.

DEACTIVATION CONDITIONS:
1 IGF1 detected in consecutive 8 ignitions.

Data Trouble Code No. 15

FAIL-SAFE OPERATION:
Fuel cut.

DEACTIVATION CONDITIONS:
1 IGF2 detected in consecutive 8 ignitions.

Data Trouble Code No. 16

FAIL-SAFE OPERATION:
Torque control prohibited.

DEACTIVATION CONDITIONS:
Returned to normal condition.

Data Trouble Code No. 22

FAIL-SAFE OPERATION:
THW is fixed at 80°C (176°F).

DEACTIVATION CONDITIONS:
Returned to normal condition.

Data Trouble Code No. 24

FAIL-SAFE OPERATION:
THA is fixed at 20°C (68°F).

DEACTIVATION CONDITIONS:
Returned to normal condition.

Data Trouble Code No. 31

FAIL-SAFE OPERATION:
Ignition timing fixed at 10° - 30° BTDC.
Injection time fixed between 3 milliseconds - 30 milliseconds in relation to:
- Engine RPM
- Throttle angle
- Idle Air Control step value

DEACTIVATION CONDITIONS:
KS input 15 times per second or more.

Data Trouble Code No. 35

FAIL-SAFE OPERATION:
Atmospheric pressure is fixed at 101.3 kPa (29.92 in Hg).

DEACTIVATION CONDITIONS:
Returned to normal condition.

Data Trouble Code No. 41

FAIL-SAFE OPERATION:
VTA 1 is fixed at 0°.

DEACTIVATION CONDITIONS:
The following conditions must be repeated at least 2 times consecutively.
- When closed throttle position switch is ON:
Terminal VTA voltage is between 0.25 volts and 0.95 volts.
- When closed throttle position switch is OFF:
Terminal VTA voltage is between 0.25 volts and 4.9 volts.

Data Trouble Code No. 52

FAIL-SAFE OPERATION:
Maximum timing retardation.

DEACTIVATION CONDITIONS:
Ignition Switch OFF.

Data Trouble Code No. 53

FAIL-SAFE OPERATION:
Maximum timing retardation.

DEACTIVATION CONDITIONS:
Returned to normal condition.

Data Trouble Code No. 55

FAIL-SAFE OPERATION:
Maximum timing retardation.

DEACTIVATION CONDITIONS:
Ignition Switch OFF.

BACK-UP FUNCTION
If there is trouble with the program in the Engine Control Module and Ignition signals are not output from the processor, the Engine Control Module controls fuel injection and ignition timing at predetermined levels as a back-up function to make it possible to continue to operate the vehicle. The ignition timing is fixed at 5 BTDC, without relation to the engine speed. If the engine is controlled by the back-up function, the malfunction indicator lamp lights up to warn the driver of the malfunction but the diagnostic trouble code is not output.