How To Proceed With Troubleshooting [10/2014 - ]

HINT:

Use the following procedure to troubleshoot the navigation system.
*: Use the Techstream.

VEHICLE BROUGHT TO WORKSHOP
NEXT: Go to next step

CUSTOMER PROBLEM ANALYSIS

When troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

The following 5 items are important points in problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

NEXT: Go to next step

INSPECT BATTERY VOLTAGE
1. Measure the battery voltage.
  Standard voltage
  
  11 to 14 V
  
  HINT:
  
  If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.
  
  NEXT: Go to next step
CHECK CABIN
1. Check that condensation is not likely to occur in the cabin, and that the temperature is not high or extremely low in the cabin.
  OK
  
  Condensation is not likely being produced and the temperature is not high or extremely low.
  
  HINT:
  - A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
  - The navigation system may not operate normally when the temperature is -20°C (-4°F) or less, or 65°C (149°F) or higher.
  NG → SET CABIN TO APPROPRIATE TEMPERATURE
  
  OK: Go to next step

CHECK NAVIGATION SYSTEM NORMAL CONDITION

Refer to Check Navigation System Normal Condition. Refer to OPERATION CHECK [10/2014 - ] .

RESULT

Result	Proceed to
Symptom is not normal operation.	A
Symptom is normal operation.	B

B → SYMPTOM IS NORMAL OPERATION

A: Go to next step

CHECK CAN COMMUNICATION SYSTEM*

Check if CAN communication system DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ] .

RESULT

Result	Proceed to
CAN DTCs are not output.	A
CAN DTCs are output.	B

B → GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]

A: Go to next step

CHECK FOR DTC*

Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR [10/2014 - ] .

RESULT

Result	Proceed to
DTCs are output.	A
DTCs are not output.	B

B → Go to step 11

A: Go to next step

DTC CLEAR*
1. Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR [10/2014 - ] .
  HINT:
  
  The present DTCs may not indicate actual malfunctions depending on the vehicle operating conditions.
  
  NEXT: Go to next step

RECHECK FOR DTC*

Refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR [10/2014 - ] .

RESULT

Result	Proceed to
DTCs are output.	A
DTCs are not output.	B

HINT:

Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
Check the DTCs and inspect the area that the code indicates.

B → Go to step 11

A: Go to next step

DIAGNOSTIC TROUBLE CODE CHART

*1: w/ Manual (SOS) Switch
*2: w/ Rear Seat Entertainment System

Find the output code in Diagnostic Trouble Code Chart. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] .

NOTE:

The navigation system outputs DTCs for the following system.
When DTCs other than those in Diagnostic Trouble Code Chart for the navigation system are output, refer to Diagnostic Trouble Code Chart for the relevant system.
Refer to Audio and Visual System. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ]
Refer to Parking Assist Monitor System (for Camera built-in ECU). Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ]
Refer to Safety Connect System. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] *1
Refer to Lexus Enform System. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] *1
Refer to Rear Seat Entertainment System. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - ] *2

RESULT

Result	Proceed to
DTCs for the audio and visual system are output.	A
DTCs for the parking assist monitor system (for Camera built-in ECU) are output.	B
DTCs for the safety connect system are output.*1	C
DTCs for the LEXUS Enform system are output.*1	D
DTCs for the rear seat entertainment system are output.*2	E
DTCs for the navigation system are output.	F

B → GO TO PARKING ASSIST MONITOR SYSTEM (for Camera built-in ECU). Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]

C → GO TO SAFETY CONNECT SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]

D → Go to LEXUS ENFORM SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]

E → Go to REAR SEAT ENTERTAINMENT SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]

F → Go to step 14

A → GO TO AUDIO AND VISUAL SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]

CHECK SD CARD

Enter the "SD Check" screen. Refer to Check SD Card in Operation Check. Refer to OPERATION CHECK [10/2014 - ] .

RESULT

Result	Proceed to
"OK" is displayed.	A
"NG" is displayed.	B

B → REPLACE SD CARD

A: Go to next step

PROBLEM SYMPTOMS TABLE

Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE [10/2014 - ] .

RESULT

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

HINT:

If the symptom does not recur and no DTCs are output, attempt to reproduce the symptoms. Refer to PROBLEM SYMPTOMS TABLE [10/2014 - ] .

B → ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

A: Go to next step

PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM
1. Refer to Terminals of ECU. Refer to TERMINALS OF ECU [10/2014 - ] .
  NEXT: Go to next step
CHECK CIRCUIT
1. Adjust, repair or replace as necessary.
  NEXT: Go to next step
RECHECK FOR DTC
1. After clearing DTCs, recheck for DTCs. Refer to DTC CHECK / CLEAR [10/2014 - ] .
  NEXT: Go to next step
PERFORM CONFIRMATION TEST
NEXT → END