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

Toyota Tacoma (2015-2018) Service Manual / Differential / Differential System(w/ Rear Differential Lock) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure listed to troubleshoot the differential system (w/ Differential Lock).
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

3.	INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

4.	CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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

Click here

HINT:

The ECU of this system is connected to the CAN communication system.

Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

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

CHECK CAN COMMUNICATION SYSTEM

5.	CHECK DTC AND FREEZE FRAME DATA*

(a) Check for DTCs.

Click here (b) Check for freeze frame data.

(b) Check for freeze frame data.

HINT:

Record or print DTCs and freeze frame data if necessary.

Click here (d) Recheck for DTCs.

(d) Recheck for DTCs.

Click here (1) Simulate the malfunction condition and check if the DTCs are output again.

(1) Simulate the malfunction condition and check if the DTCs are output again.

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

GO TO STEP 10

6.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault not listed in problem symptoms table	A
Fault listed in problem symptoms table	B

GO TO STEP 8

7.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU.

Click here (b) Data List / Active Test.

(b) Data List / Active Test.

Click here

8.	REPAIR OR REPLACE

9.	CONFIRM TEST

END

10.	GO TO DTC CHART

11.	REPAIR OR REPLACE

12.	CONFIRM TEST

END

System Diagram

SYSTEM DIAGRAM Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method 4 wheel drive control ECU Skid cont ...

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Other materials:

Transmission Control Switch Circuit
DESCRIPTION After moving the shift lever to S, it is possible to switch the shift range between "1" (S1 range) and "6" (S6 range) using the transmission control switch. Moving the shift lever to "+" once raises the shift range by one, and moving the shift lever to ...

Front Passenger Side Door ECU Communication Stop (B2322)
DESCRIPTION This DTC is stored when LIN communication between the front power window regulator motor assembly RH and main body ECU (multiplex network body ECU) stops for 10 seconds or more. DTC No. DTC Detection Condition Trouble Area B2322 ...

Cruise Control Switch Circuit
DESCRIPTION This circuit sends signals to the ECM depending on the cruise control main switch condition. The battery supplies the positive (+) battery voltage to the cruise control main switch. Then terminal CCS of the ECM receives the voltage as the signal according to the switch condition. ...