Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Fail-safe Chart

FAIL-SAFE CHART

HINT:

If any of the following auto cancel conditions are detected while the dynamic radar cruise control system is controlling vehicle speed, the system clears the stored vehicle speed and cancels control of vehicle speed by the dynamic radar cruise control system.

Automatic Cancel Control

Constant Speed Control Mode:

Auto Cancel Condition

Warning

Fail-safe Deactivation Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

Open or short in stop light switch circuit

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

  • Problem with stop light switch input circuit
  • Problem with cruise control main switch cancel circuit
  • Malfunction in the vehicle stability control system
  • Communication stop between skid control ECU (brake actuator assembly) and ECM

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Ignition switch ON again.

If the following condition occurs, the ECM cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Vehicle speed is less than approximately 40 km/h (25 mph) while driving with the dynamic radar cruise control system controlling vehicle speed

-

Does not illuminate

Illuminates

-

Cruise control main switch is pushed to +RES

Malfunction in SFI system

-

Illuminates

Does not illuminate

-

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

Vehicle speed is less than stored vehicle speed by approximately 16 km/h (10 mph) or more

-

Does not illuminate

Illuminates

-

Cruise control main switch is pushed to -SET

  • Vehicle stability control system operates while driving with dynamic radar cruise control system controlling vehicle speed
  • TRAC system operates for a certain period of time while driving with dynamic radar cruise control system controlling vehicle speed.
  • TRAC is turned off
  • VSC is turned off
  • Drive start control is performed

-

Does not illuminate

Illuminates

-

Cruise control main switch is pushed to +RES

Vehicle-to-vehicle Distance Control Mode:

Auto Cancel Condition

Warning

Fail-safe Deactivation Condition

Multi-information Display

Master Warning Light

Cruise Control Indicator

Warning Buzzer

Open or short in stop light switch circuit

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

Malfunction in SFI system

-

Illuminates

Does not illuminate

-

Dynamic radar cruise control system is turned off and back on again using the cruise control main switch (ON-OFF button).

If either of the following conditions occurs, the ECM cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Vehicle speed is less than approximately 40 km/h (25 mph) while driving with the dynamic radar cruise control system controlling vehicle speed

-

Does not illuminate

Illuminates

Sounds

Cruise control main switch is pushed to +RES

  • Malfunction in the millimeter wave radar sensor assembly
  • Beam axis of millimeter wave radar sensor assembly misaligned
  • Problem with stop light switch input circuit
  • Problem with cruise control main switch cancel circuit

Cruise Control Malfunction Visit Your Dealer

Illuminates

Does not illuminate

Sounds

Ignition switch ON again.

If the following condition occurs, the ECM cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Millimeter wave radar sensor assembly becomes dirty

Radar Cruise Control Unavailable Clean Sensor

Illuminates

Does not illuminate

Sounds

The condition returns to normal (the resume function can be operated after fail-safe is deactivated).

If any of the conditions listed below occurs, the ECM cancels control of vehicle speed by the dynamic radar cruise control system (stored vehicle speed is maintained):

  • Millimeter wave radar sensor assembly sensitivity reduced because of bad weather such as rain, fog, snow, or sandstorm
  • Brake control by the dynamic radar cruise control system is temporarily unavailable
  • The beam axis of the millimeter wave radar sensor assembly is being aligned
  • The forward recognition camera is temporarily unavailable
  • A system check is being performed after the engine has started

Radar Cruise Control Unavailable

Illuminates

Does not illuminate

Sounds

The conditions return to normal (the resume function can be operated after fail-safe is deactivated).

  • Vehicle stability control system operates while driving with cruise control system controlling vehicle speed
  • TRAC system operates for a certain period of time while driving with cruise control system controlling vehicle speed.
  • TRAC is turned off
  • VSC is turned off
  • Drive start control is performed

-

Does not illuminate

Illuminates

-

Cruise control main switch is pushed to +RES

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Dynamic Radar Cruise Control System DTC No. Detection Item Link C1A02 Vehicle Information Not Obtained ...

Lost Communication with ECM / PCM "A" (U0100,U0104,U0122,U0125,U0126,U0129)
DESCRIPTION The millimeter wave radar sensor assembly and ECM communicate with each sensor and ECU via CAN communication. If any malfunction is detected in a CAN communication circuit, one or more ...

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Short in Front Passenger Side Squib 2nd Step Circuit (B1815/54-B1818/54)
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DESCRIPTION When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a motor malfunction and the sliding roof operation is stopped, DTC B2341 is stored. When the sliding roof ECU (sliding roof drive gear sub-assembly) detects a gear position malfunction and the sliding roof ope ...

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