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

Toyota Tacoma (2015-2018) Service Manual / Door Lock / Wireless Door Lock Control System(w/o Smart Key System) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

The wireless door lock control system troubleshooting procedures are based on the premise that the power door lock control system is operating normally. Check the power door lock control system first before troubleshooting the wireless door lock control system. Use this procedure to troubleshoot the wireless door lock control system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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 in the problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Running conditions, driving conditions, weather conditions
How did it happen?	Problem symptoms

3.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

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

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
DTC is not output	A
DTC is output	B

GO TO CAN COMMUNICATION SYSTEM

5.	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

GO TO STEP 7

6.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here (b) Terminals of ECU

(b) Terminals of ECU

Click here (c) Data List / Active Test

Click here

7.	REPAIR OR REPLACE

8.	CONFIRMATION TEST

END

System Diagram

SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signal Line Main body ECU (Multiplex ...

Operation Check

OPERATION CHECK 1. NOTICE WHEN CHECKING THE FOLLOWING (a) Wireless door lock/unlock function: This wireless door lock control function operates only when the following 3 conditions are met: (1) ...

Other materials:

Destination Information Undefined (C1AB8)
DESCRIPTION This DTC is stored when correct destination information is not sent from the main body ECU (multiplex network body ECU) and destination information cannot be confirmed after a blind spot monitor has been replaced. DTC Code DTC Detection Condition Tr ...

Freeze Frame Data
FREEZE FRAME DATA DESCRIPTION (a) Whenever a lane departure alert system is stored, the forward recognition camera stores the current vehicle state (ECU and sensor information) as Freeze Frame Data. CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch ...

Poor Sound Quality in All Modes (Low Volume)
PROCEDURE 1. CHECK AUDIO SETTINGS (a) Set Treble, Mid and Bass to the initial values and check that sound is normal. OK: Malfunction disappears. HINT: Sound quality adjustment measures vary according to the type of amplifier. OK END ...