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

Toyota Tacoma (2015-2018) Service Manual / Air Conditioning / Air Conditioning System(for Automatic Air Conditioning System) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the air conditioning system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY VOLTAGE

(a) Inspect 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.

3.	CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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

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

GO TO CAN COMMUNICATION SYSTEM

4.	CHECK FOR DTC*

(a) Check for DTCs and note any code that is output.

(b) Clear the DTCs.

(c) Recheck for DTCs. Based on the DTCs output above, try to force the air conditioning system to output DTCs by simulating the conditions indicated by the DTC.

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

GO TO DIAGNOSTIC TROUBLE CODE CHART

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) Panel diagnosis (indicator check, sensor check)

Click here (b) Data List / Active Test

(b) Data List / Active Test

Click here (c) Terminals of ECU

Click here (d) On-vehicle Inspection

(d) On-vehicle Inspection

(e) Inspection

7.	ADJUST, REPAIR OR REPLACE

END

Customize Parameters

CUSTOMIZE PARAMETERS PROCEDURE 1. CUSTOMIZE AIR CONDITIONING SYSTEM (a) Customizing with the Techstream NOTICE: When the customer requests a change in a function, first make sure that ...

System Description

SYSTEM DESCRIPTION 1. GENERAL (a) The air conditioning system has the following controls. Control Outline Neural Network Control This control is ca ...

Other materials:

Clearance Sonar Main Switch Circuit
DESCRIPTION The back sonar or clearance sonar switch assembly is installed at the base of the driver side of the instrument panel. When the back sonar or clearance sonar switch assembly is turned on, an on signal is sent to the clearance warning ECU assembly. The intuitive parking assist syste ...

Adjustment
ADJUSTMENT PROCEDURE 1. INSPECT AND ADJUST CLUTCH PEDAL (a) Fold back the floor carpet. (b) Check that the pedal height is correct. Text in Illustration *a Pedal Height Adjustment Point *b Push Rod Pla ...

Ignition Hold Monitor Malfunction (B2271)
DESCRIPTION This DTC is stored when a malfunction in the IG circuit or IG hold circuit in the certification ECU (smart key ECU assembly) is detected. HINT: When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in ...