Lexus IS250 IS220d GSE20 ALE20 - NAVIGATION


NAVIGATION SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING


1.VEHICLE BROUGHT INTO A WORKSHOP
NEXT
2.DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION

Ask the customer about symptoms and confirm malfunctions.

.
THE SCREEN DISPLAYS NOTHING (GO TO STEP 9, AND PROCEED TO "NO IMAGE APPEARS ON MULTI-DISPLAY")
.
OTHER SYMPTOMS (GO TO STEP 3)
3.CHECK MULTIPLEX COMMUNICATION SYSTEM (BEAN)

Use the intelligent tester to check for normal function of the body multiplex communication system.

.
A CODE IS OUTPUT (PROCEED TO "BODY MULTIPLEX COMMUNICATION SYSTEM")
.
A CODE IS NOT OUTPUT (GO TO STEP 4)
4.CONFIRM THE SYSTEM NORMAL CONDITION
.
APPLICABLE (THIS IS NOT A MALFUNCTION)
.
NOT APPLICABLE (GO TO STEP 5)
5.CHECK DTC
  • HINT:
  • If the system cannot enter the diagnostic mode, inspect each AVC-LAN communication component and repair or replace problem parts.
.
A CODE IS OUTPUT (GO TO STEP 6)
.
A CODE IS NOT OUTPUT (GO TO STEP 9)
6.DTC CLEAR

Clear the DTCs and finish the diagnostic mode.

  • HINT:
  • The currently output DTCs may not indicate actual malfunctions depending on the vehicle conditions.
NEXT
7.RECHECK DTC
  • HINT:
If the system cannot enter the diagnosis mode, inspect the AVC-LAN and all the components that connect to the AVC-LAN for short circuits.
Even if the malfunction symptom is not confirmed, check for diagnostic trouble codes. This is because the system stores past diagnostic trouble codes.
Refer to the detailed description on the diagnostic screen, as necessary .
Check the diagnostic trouble code and inspect the area the code indicates.
.
A CODE IS OUTPUT (GO TO STEP 8)
.
A CODE IS NOT OUTPUT (GO TO STEP 9)
8.DIAGNOSTIC TROUBLE CODE CHART

Find the output code on the diagnostic trouble code chart.

NEXT.
GO TO STEP 11
9.PROBLEM SYMPTOMS TABLE

Find the applicable symptom code in the problem symptoms table.

  • HINT:
  • If the symptom does not recur and no code is output, perform the symptom reproduction method .
.
THERE IS AN APPLICABLE SYMPTOM CODE IN THE TABLE (GO TO STEP 11)
.
THERE IS NO APPLICABLE SYMPTOM CODE IN THE TABLE (GO TO STEP 10)
10.CHECK THE ECU TERMINAL ARRANGEMENT BASED ON THE MALFUNCTION SYMPTOM
NEXT
11.CHECK THE CIRCUIT

Adjust, repair, or replace as necessary.

NEXT
12.RECHECK THE DIAGNOSTIC TROUBLE CODE
  • HINT:
  • After deleting the DTCs, recheck for diagnostic trouble codes.
NEXT
13.PERFORM CONFIRMATION TEST
NEXT
END
LEXUS IS250, IS220d / GSE20 ALE20
NAVIGATION
Lexus IS250 IS220d GSE20 ALE20
NAVIGATION SYSTEM