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 Entry Function).
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

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. Does it occur recently or for a long time?

    Where?

    Does it occur at specified place?

    Under what conditions?

    Unlock/lock the door, engine switch on (IG), engine start.

    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 start function.
      8. If the wireless answer-back buzzer and outside warning buzzers do not sound.
      9. If an engine start was attempted by holding the electrical key transmitter sub-assembly near the engine switch and then pressing the engine switch.
      10. If the interior warning buzzers do not sound.
      11. Any other details concerning the problem.
    • If it is suspected 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 when the electrical key transmitter sub-assembly was near the vehicle (electrical key antenna).

      3. If the system does not operate only when near specific vehicles (there may be wave interference from the wireless systems of other vehicles).
      4. If the system operates intermittently.
      5. If the electrical key transmitter sub-assembly is bundled together with other items.
      6. If the electrical key transmitter sub-assembly is carried together with other electronic devices, such as cell phones, personal computers, portable music players, other electrical key transmitter sub-assemblies, etc. (keep the electrical key transmitter sub-assembly at least 0.1 m (0.328 ft.) away from such items).
      7. Where the electrical key transmitter sub-assembly is being kept when not in use:

        Whether or not the electrical key transmitter sub-assembly 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 lights, cordless telephones, etc.

      8. If there are electronic devices that transmit electric waves placed in the vehicle.
      9. When the transmitter battery was last replaced.

        The transmitter battery can be checked roughly 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 BATTERY VOLTAGE

(a) Measure the vehicle battery voltage.

Standard voltage:

11 to 14 V

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

NEXT

4.

CHECK 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

A

5.

CHECK METER / GAUGE SYSTEM*

(a) Use the Techstream to check if the meter/gauge system is functioning normally.

HINT:

If the certification ECU (smart key ECU assembly) mistakenly receives a vehicle speed signal, communication between the vehicle and the Techstream fails. Be sure to check "Vehicle Speed Meter" displayed on the Data List to make sure that the vehicle speed is not abnormal.

Result

Proceed to

No vehicle speed signal is mistakenly received.

A

A vehicle speed signal is mistakenly received.

B

B

GO TO METER / GAUGE SYSTEM

A

6.

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

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

Click here

Result

Proceed to

LIN DTC is not output

A

LIN DTC is output

B

B

GO TO LIN COMMUNICATION SYSTEM

A

7.

CHECK FUNCTION OF WIRELESS DOOR LOCK CONTROL SYSTEM*

(a) Use the Techstream to check if the wireless door lock control system is functioning normally.

Click here

Result

Proceed to

Wireless door lock control system DTC is not output

A

Wireless door lock control system DTC is output

B

B

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM

A

8.

CHECK FOR DTC*

(a) Recheck for DTCs.

Click here

Result

Proceed to

DTC is not output

A

Steering lock system DTC is output

B

Engine immobiliser system DTC is output

C

Smart key system (for Entry Function) DTC is output

D

B

GO TO STEERING LOCK SYSTEM

C

GO TO ENGINE IMMOBILISER SYSTEM

D

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

9.

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 11

A

10.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check.

Click here (b) Check Data List / Active Test.

(b) Check Data List / Active Test.

Click here (c) Check Terminals of ECU.

(c) Check Terminals of ECU.

Click here

NEXT

11.

REPAIR OR REPLACEMENT

NEXT

12.

CHECK FOR DTC*

(a) Clear the DTCs.

Click here (b) Check for DTCs.

(b) Check for DTCs.

Click here HINT:

HINT:

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

Click here

Result

Proceed to

DTC is not output

A

Smart key system (for Entry Function) DTC is output

B

A

END

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

System Diagram
SYSTEM DIAGRAM This is a detailed diagram related to the main body ECU (multiplex network body ECU). Component Function Front door outside handle ...

System Description
SYSTEM DESCRIPTION 1. SYSTEM DESCRIPTION The following pattern will be used: "Operation" indicates user operation using the smart key system. "Expected operation of the vehicle" ...

Other materials:

Crankshaft Position Sensor
Components COMPONENTS ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL CRANKSHAFT POSITION SENSOR (a) Apply a light coat of engine oil to the O-ring of the crankshaft position sensor. NOTICE: When reusing the crankshaft position sensor, inspect the O-ring. ...

Headlight switch
The headlights can be operated manually. Turning the end of the lever turns on the lights as follows: Type A The daytime running lights turn on. The side marker, parking, tail, license plate, daytime running lights and instrument panel lights turn on. The headlights and all lights lis ...

Removal
REMOVAL PROCEDURE 1. PRECAUTION CAUTION: Be sure to read Precaution thoroughly before servicing (See page ). NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the ...

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