Toyota Tundra Service Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the airbag system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms.

Click here

NEXT

3.

INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

HINT:

  • A simple method to determine whether the battery is discharged is to operate the horn.
  • If the voltage is below 11 V, recharge or replace the battery before proceeding.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

4.

CHECK CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check if the CAN communication system is functioning normally.

OK:

CAN communication system is functioning normally.

HINT:

  • Refer to Communication Bus Check in CAN Communication System.

    Click here

  • The airbag sensor assembly is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there are no malfunctions in the CAN communication system.
NG

GO TO CAN COMMUNICATION SYSTEM

OK

5.

SRS WARNING LIGHT CHECK

(a) Proceed to Operation System.

Click here

NEXT

6.

CHECK DTC*

(a) Check for DTCs.

Click here

OK:

DTCs are not output.

NG

GO TO PROBLEM SYMPTOMS TABLE

OK

7.

DIAGNOSTIC TROUBLE CODE CHART

(a) Diagnostic Trouble Code Chart.

Click here

NEXT

8.

CIRCUIT INSPECTION*

NEXT

9.

REPAIR

NEXT

10.

CLEAR DTC*

(a) Clear the DTCs.

Click here

NEXT

11.

CHECK DTC*

(a) Check for DTCs.

Click here

OK:

DTCs are not output.

NG

GO TO STEP 13

OK

12.

USE SIMULATION METHOD TO CHECK

Click here

NEXT

13.

IDENTIFICATION OF PROBLEM

NEXT

14.

REPAIR OR REPLACEMENT

NEXT

15.

CONFIRMATION TEST

NEXT

END

    Dtc Check / Clear

    Operation Check

    See More:

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