Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the smart key system (for Start Function).
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS CHECK

HINT:

  • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
  • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
  • The following 5 items are important points for problem analysis:

    What

    Vehicle model, system name

    When

    Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time

    Where

    Whether the problem occurs at a specific location

    Under what conditions?

    Whether the doors were locked or unlocked, whether the engine switch was on, whether the engine has started

    How did it happen?

    Problem symptoms*

    • *: Be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem, and then check for DTCs.
      1. If the entry lock/unlock function does not operate for all doors.
      2. If the entry lock function does not operate.
      3. If the entry unlock function does not operate.
      4. If both the entry lock and unlock functions do not operate.
      5. If the wireless lock and unlock functions do not operate.
      6. If there is no power even when the engine switch is pressed (does not turn on (ACC)).
      7. If the engine does not start with the push-button start function.
      8. If the wireless answer-back buzzer and outside warning buzzers do not sound.
      9. If the customer attempted to start the engine by touching the electrical key to the engine switch and pressing the engine switch.
      10. If the interior warning buzzers do not sound.
      11. If the steering does not unlock.
      12. Any other details concerning the problem.
    • If it is thought that wave interference is likely, be sure to ask the customer in detail about the following points concerning the vehicle operating conditions, environment and problem.
      1. Specific locations where the system does not operate (such as near TV towers, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc.).
      2. Specific times when the system does not operate:Whether or not symptoms occurred immediately after purchase or only recently.Whether or not the symptoms occurred even when the key was near the vehicle (electrical key antenna).
      3. If the system does not operate only when near specific vehicles (there may be an effect from electric waves from the wireless systems of other vehicles).
      4. If the system operates intermittently.
      5. If the key is bundled together with other items.
      6. If the key is carried together with other electronic devices, such as cell phones, personal computers, portable music players, other electrical keys, etc. (keep the key at least 0.1 m (0.33 ft.) away from such items).
      7. Where the key is being kept when not in use:

        Whether or not the key being placed within 1 m (3.28 ft.) of items such as TVs, DVD recorders, induction cookers, rice cookers, dishwashers, modems, cell phones, personal computers, microwave ovens, desk or floor lamps, cordless telephones, etc.

      8. If there are electronic devices that transmit electric waves placed in the vehicle.
      9. When the key battery was last replaced (when the battery is low):

        The key battery can be checked using the "Key Low Battery" item in the Data List.

        Click here

      10. If the customer installed any optional components (theft deterrent devices, wireless fog lights, etc.) to the vehicle.
NEXT

3.

INSPECT BASIC OPERATION

(a) Inspect battery voltage.

Standard voltage:

11 to 14 V

NOTICE:

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check for blown fuses, open or shorted wire harnesses, improperly connected connectors and other problems in areas that can be visually inspected.

NEXT

4.

INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

A

5.

CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output.

Click here

Result

Proceed to

DTC is not output

A

Engine immobiliser system DTC is output

B

Smart key system (for Entry Function) DTC is output

C

Smart key system (for Start Function) DTC is output

D

Steering lock system DTCs are output

E

B

GO TO ENGINE IMMOBILISER SYSTEM

C

GO TO SMART KEY SYSTEM (for Entry Function)

D

GO TO DIAGNOSTIC TROUBLE CODE CHART

E

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

6.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed in problem symptoms table

B

B

GO TO STEP 8

A

7.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here (b) Terminals of ECU

(b) Terminals of ECU

Click here (c) Data List / Active Test

(c) Data List / Active Test

Click here

NEXT

8.

REPAIR OR REPLACE

NEXT

9.

CHECK FOR DTC*

(a) Clear the DTCs.

Click here (b) Recheck for DTCs.

(b) Recheck for DTCs.

Click here HINT:

HINT:

Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

Result

Proceed to

DTC is not output

A

DTC is output

B

A

END

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

System Diagram
SYSTEM DIAGRAM Component Outline Engine switch Transponder key amplifier Turns on the power and starts the eng ...

Operation Check
OPERATION CHECK 1. OPERATION DESCRIPTION (a) Push-button start function: (1) When the electrical key transmitter sub-assembly is in a detection area inside the vehicle and the brake pedal is depr ...

Other materials:

Cargo and luggage
Take notice of the following information about storage precautions, cargo capacity and load. ● Stow cargo and luggage in the rear deck whenever possible. ● Be sure all items are secured in place. ● Be careful to keep the vehicle level. Placing the weight as far forward as po ...

Brake Switch "A" Signal Compare Failure (P057162)
DESCRIPTION When the brake pedal is depressed, stop light switch assembly sends a signal to the ECM. Upon receiving the signal, the ECM cancels the cruise control system. DTC Code DTC Detection Condition Trouble Area MIL Note ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) The certification ECU (smart key ECU assembly) and ECM control the vehicle engine immobiliser system functions. Engine immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a ...

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