How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

VEHICLE BROUGHT TO WORKSHOP
INSPECTION BATTERY VOLTAGE
Standard voltage: 11 to 14 V

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

BASIC INSPECTION

Turn the ignition switch ON.

Check whether or not the radio receiver turns on.

Result

RESULT REFERENCE

Result	Proceed to
Radio receiver turns on	A
Radio receiver does not turn on	B

B: Go to step 6

A: Go to next step

CHECK FOR DTC

Check for DTCs and note any codes that are output.
Delete the DTCs.
Recheck for DTCs by simulating the operations indicated by the output DTCs.

HINT:

If the system cannot enter the diagnostic mode, inspect each AVC-LAN communication signal and repair or replace the problem parts.
Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores past DTCs.
Check and clear past DTCs. Then recheck for DTCs.

Result

RESULT REFERENCE

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

B: Go to step 6

A: Go to next step

DIAGNOSTIC TROUBLE CODE TABLE
Find the output code on the DIAGNOSTIC TROUBLE CODE TABLE .

Go to step 8

PROBLEM SYMPTOMS TABLE

Refer to PROBLEM SYMPTOMS TABLE .

Result

RESULT REFERENCE

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: Go to next step

OVERALL ANALYSIS AND TROUBLESHOOTING
1. See TERMINALS OF ECU .
ADJUST, REPAIR OR REPLACE
CONFIRMATION TEST