Vehicle Interior

How To Proceed With Troubleshooting

~2min read
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 these procedures to troubleshoot the wireless door lock control system.
  • *: Use the Techstream.
PROCEDURE
  1. VEHICLE BROUGHT TO WORKSHOP

NEXT
  1. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

NEXT
  1. CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output (See page ).


(b) Clear the DTCs (See page ).


(c) Recheck for DTCs (See page ). Based on the
DTCs output above, try to force output of the same CAN communication system DTC, LIN communication system DTC or wireless door lock control system DTC by reproducing the symptoms indicated by the DTC.

Result

Proceed to

DTC is not output

A

CAN communication system DTC is output

B

LIN communication system DTC is output

C

Wireless door lock control system DTC is output

D


B

GO TO CAN COMMUNICATION SYSTEM


C

GO TO LIN COMMUNICATION SYSTEM


D

GO TO DIAGNOSTIC TROUBLE CODE CHART

A
  1. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table (See page
).

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed in problem symptoms table

B


B

GO TO STEP 6

A
  1. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check (See page ).


(b) Terminals of ECU (See page ).


(c) Data List / Active Test (See page ).


NEXT
  1. REPAIR OR REPLACE

NEXT
  1. CONFIRMATION TEST


NEXT

END

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.