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

Toyota Tacoma (2015-2018) Service Manual / Door Lock / Power Door Lock Control System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the power door lock control system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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
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.	CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for LIN communication system DTCs.

Click here

Result	Proceed to
LIN DTCs are not output	A
LIN DTCs are not output	B

GO TO LIN COMMUNICATION SYSTEM

5.	CHECK FOR DTC (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY), 1

*1: w/ Jam Protection

(a) Clear the DTCs.

Click here (b) Recheck for DTCs.

(b) Recheck for DTCs.

Result	Proceed to
DTC B2312 is not output	A
DTC B2312 is output	B

GO TO POWER WINDOW CONTROL SYSTEM

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

GO TO STEP 9

7.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU.

Click here (b) Data List / Active Test.

(b) Data List / Active Test.

Click here (c) Operation Check.

Click here

8.	REPAIR OR REPLACE

9.	CONFIRMATION TEST

END

Customize Parameters

CUSTOMIZE PARAMETERS 1. CUSTOMIZE POWER DOOR LOCK CONTROL SYSTEM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, first make sure th ...

Operation Check

OPERATION CHECK 1. CHECK POWER DOOR LOCK OPERATION NOTICE: The operation check below is based on the non-customized initial condition of the vehicle. (a) Check basic functions. (1) Check that a ...

Other materials:

Initialization Switch (for Test Mode DTC) (C2198/98)
DESCRIPTION During test mode, when the tire pressure warning reset switch is on, the tire pressure warning light comes on and when the tire pressure warning reset switch is off, the tire pressure warning light blinks at 0.125 second intervals. DTC No. DTC Detection Condit ...

Clearance Warning ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Clearance Warning ECU Communication Stop Mode Either Condition is met: Communication stop for "Clearance Warning (Intuitive Parking Assist1)" is indicated on th ...

Occupant Classification ECU Malfunction (B1795)
DESCRIPTION DTC B1795 is set when a malfunction is detected in the occupant detection ECU. Troubleshoot DTC B1771 first when both DTCs B1771 and B1795 are present. DTC No. DTC Detections Conditions Trouble Areas B1795 Occupant detection ...