Toyota Avalon (XX50): Dtc Check / Clear. Freeze Frame Data. How To Proceed With Troubleshooting

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System(for Gasoline Model) / Dtc Check / Clear. Freeze Frame Data. How To Proceed With Troubleshooting

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC (CHECK USING TECHSTREAM)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG) and wait for 90 seconds.

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

Body Electrical > Navigation System > Trouble Codes

(e) Check for DTCs, and then write them down.

(f) Check the details of the DTC(s).

Click here

NOTICE:

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.

System	Proceed to
Parking Assist Monitor System

CLEAR DTC (CLEAR USING TECHSTREAM)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG) and wait for 90 seconds.

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

Body Electrical > Navigation System > Clear DTCs

(e) Clear the DTCs.

START DIAGNOSTIC MODE

HINT:

Illustrations may differ from the actual vehicle screen depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle screen.
If the system cannot enter diagnostic mode, inspect all AVC-LAN communication components and repair or replace the malfunctioning parts.
Click here
Start diagnostic mode at least 90 seconds after turning the engine switch on (IG). Otherwise, some items cannot be checked.

(a) There are 4 methods to start diagnostic mode. Start diagnostic mode by using one of them.

(b) Method 1

(1) Turn the engine switch on (IG).

(2) While pressing and holding the "AUDIO" switch, operate the light control switch: Off → Tail → Off → Tail → Off → Tail → Off.

(3) Diagnostic mode will start and the "Service Menu" screen will be displayed.

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Body Electrical / Navigation System / Utility / Diagnostic Mode.

Body Electrical > Navigation System > Utility

Tester Display
Diagnostic Mode

(5) Diagnostic mode will start and the "Service Menu" screen will be displayed.

(d) Method 3

(1) Turn the engine switch on (IG).

(2) Press the seek/track up panel switch 5 times and then press the seek/track down panel switch 5 times with the screen and audio turned off.

HINT:

Diagnostic mode can only be started if the above operation is completed within 15 seconds of the first press of the seek/track up panel switch.
If the operation is not completed within 15 seconds of the first press of the seek/track panel switch or fails, turn the screen and audio on and then off again before attempting to start diagnostic mode.

(3) Diagnostic mode will start and the "Service Menu" screen will be displayed.

(e) Method 4

NOTICE:

Do not touch the multi-display except when necessary.
Since the multi-display may recognize a pinch in/out or flick operation if operated with 2 fingers, always use 1 finger to operate it in diagnostic mode.

(1) Turn the engine switch on (IG).

(2) Perform a flick operation on the multi-display screen from the left to the right 5 times and then perform a flick operation from the right to left 5 times with the screen and audio turned off as shown in the illustration.

HINT:

Diagnostic mode can only be started if the above operation is completed within 15 seconds of the first flick from the left to the right.
If the operation is not completed within 15 seconds of the first flick from the left to the right or fails, turn the screen and audio on and then off before attempting to start diagnostic mode again.
Flick operations can be recognized anywhere within the touch area of the multi-display screen.

(3) Diagnostic mode will start and the "Service Menu" screen will be displayed.

FAILURE DIAGNOSIS

(a) The "Failure Diagnosis" screen will be displayed by selecting "Failure Diagnosis" on the "Service Menu" screen.

SYSTEM CHECK

(a) The "System Check Mode" screen will be displayed by selecting "System Check" on the "Failure Diagnosis" screen.

CHECK DTC (CHECK USING SYSTEM CHECK MODE SCREEN)

HINT:

When "NCON" is displayed for all devices connected via AVC-LAN communication, or when all device names are not displayed, check if there is a short in an AVC-LAN line or device connected to the AVC-LAN. Repair or replace parts as necessary.

Click here

(a) System check mode screen description

Screen Description

Display	Content
*a: Device name list No. 1	Device Name List No. 1 displays some of the devices that make up the navigation system. The names of the components from Device Name List No. 1 are shown in the following table.
*b: Check result	Result codes for all devices are displayed.
*c: Memory clear	Present and history DTCs and registered connected device names are cleared. Select "Memory CLR" for 3 seconds.
*d: Recheck	A system check will be performed again after the memory is cleared. "Recheck" will dim during a system check.
*e: Device name list No. 2	Device Name List No. 2 displays some of the devices that make up the navigation system. The names of the components from Device Name List No. 2 are shown in the following table.

*a: Device Name List No. 1 Description

Name	Component	Connection Method
DCU	Radio and display receiver assembly	-
DSP-AMP	Stereo component amplifier assembly	AVC-LAN communication line
MEU	Navigation ECU	USB communication line
CAA	Television camera assembly*1	Vehicle wire harness
CAMERA-M	Television camera controller*2	Vehicle wire harness

*1: w/o Panoramic View Monitor System
*2: w/ Panoramic View Monitor System

*b: Check Result Description

Result	Meaning	Action
OK	The device does not respond with a DTC.	-
DETAIL	The device responds with a DTC.	Read the DTCs on the "Unit Check Mode" screen.
NCON	The device was previously present, but did not respond in diagnostic mode.	Check the vehicle wire harness. Check the power supply circuit of the device. Check the AVC-LAN communication line of the device.
NRES	The device responded in diagnostic mode, but gives no DTC information.

*e: Device Name List No. 2 Description

Name	Component	Connection Method
DCM	DCM (telematics transceiver)*	USB communication line
AUX/VTR	Stereo jack adapter assembly	Vehicle wire harness

*: w/ Manual (SOS) Switch

(b) Unit check mode screen description

Screen Description

Display	Content
*a: Device name	Target device
*b: History DTC	Diagnostic memory results and stored DTCs are displayed.
*c: Present DTC	DTCs output in the service check are displayed.
*d: DTC	DTC (Diagnostic Trouble Code)
e: Timestamp	The time and date of history DTCs are displayed. (The year is displayed in 2-digit format.)
*f: Diagnosis clear	Selecting "Code CLR" for 3 seconds clears the diagnostic memory data of the target device (both diagnostic system check result and the displayed data are cleared).

*: w/ GPS Time Setting Function

HINT:

This screen is updated once per second.
A maximum of 6 DTCs can be displayed for history and present DTCs.

(1) If the check result is "DETAIL", select the displayed check result to view the results on the "Unit Check Mode" screen and record them.

NOTICE:

A maximum of 6 DTCs can be displayed for history and present DTCs on the "Unit Check Mode" screen. Therefore, when 6 DTCs are displayed, troubleshoot those DTCs first and then check the "Unit Check Mode" screen again to see if any other DTCs are displayed.

HINT:

When all results are "OK", no DTCs are present.
When proceeding to view the results of another device, select "Back" to return to the "System Check Mode" screen. Repeat the above step to view the results of other devices.

(2) Check the details of the DTC(s).

Click here

NOTICE:

System	Proceed to
Parking Assist Monitor System

DTC CLEAR/RECHECK (CLEAR USING SYSTEM CHECK MODE SCREEN)

(a) Clear the DTCs

(1) Select "Memory CLR" for 3 seconds.

(2) Check that the check results are cleared.

HINT:

To clear the DTCs for a specific device, use the "Unit Check Mode" screen.
When clearing the DTCs using the "Unit Check Mode" screen, select "Code CLR" for 3 seconds.

(b) Recheck

(1) Select "Recheck".

(2) Check that all diagnostic codes are "OK" when the check results are displayed. If a result other than "OK" is displayed, perform troubleshooting again.

HINT:

When the DTCs are cleared using the "Unit Check Mode" screen, select "Back" to return to the "System Check Mode" screen and perform this operation.

FINISH DIAGNOSTIC MODE

(a) Turn the engine switch off.

Freeze Frame Data

FREEZE FRAME DATA

CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes.

Body Electrical > Navigation System > Trouble Codes

(e) Select a DTC to display its freeze frame data.

LIST OF FREEZE FRAME DATA

Body Electrical > Navigation System

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Battery Voltage	Battery voltage	Min.: 0 V, Max.: 24 V	11 to 14 V	-
Active Dimmer	Active dimmer function	ON or OFF	ON: Active dimmer function on OFF: Active dimmer function off	-
Tail Light SW	Taillight switch	ON or OFF	ON: Light control switch in tail or head position OFF: Light control switch off or AUTO	-
Reverse Signal	Reverse signal	ON or OFF	ON: Shift lever in R OFF: Shift lever not in R	-
Parking Brake	Parking brake switch	ON or OFF	ON: Parking brake applied OFF: Parking brake released	-
Ignition	Engine switch	ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off or on (ACC)	"OFF" is displayed even though the engine switch is on (ACC)
Vehicle Speed	Maximum wheel speed sensor reading	Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
HDMI Line(Blu-ray Disc Player)	-	Disconnected or Connected	Disconnected	Not available

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

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

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

When troubleshooting, check 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 for 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

3.	INSPECT BATTERY

(a) 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.

4.	CHECK CABIN

(a) 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 lower, or 65°C (149°F) or higher.

SET CABIN TO APPROPRIATE TEMPERATURE

5.	CHECK NAVIGATION SYSTEM NORMAL CONDITION

(a) Refer to Check System Normal Condition.

Click here

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

END

6.	CHECK CAN COMMUNICATION SYSTEM*

(a) Check if CAN communication system DTCs are output.

Click here

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

GO TO CAN COMMUNICATION SYSTEM

7.	CHECK FOR DTC*

(a) Check for DTCs.

Body Electrical > Navigation System > Trouble Codes

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

GO TO STEP 11

8.	DTC CLEAR*

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

HINT:

The present DTCs may not indicate actual malfunctions depending on the vehicle operating conditions.

9.	RECHECK FOR DTC*

(a) Recheck for DTCs.

Body Electrical > Navigation System > Trouble Codes

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

HINT:

Even if the problem symptom is not confirmed, check for DTCs. This is because the system stores history DTCs.
If more information is needed, perform a recheck using the "System Check Mode" screen after rechecking for DTCs using the Techstream.
Check for DTCs and inspect the area that the code indicates.

GO TO STEP 11

10.	DIAGNOSTIC TROUBLE CODE CHART

(a) Find the output DTC in Diagnostic Trouble Code Chart.

Click here

GO TO STEP 13

11.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

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

HINT:

If the symptoms do not recur and no DTCs are output, attempt to reproduce the symptoms.

Click here

GO TO STEP 13

12.	PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM

(a) Refer to Terminals of ECU.

Click here

13.	CHECK CIRCUIT

(a) Adjust, repair or replace as necessary.

14.	RECHECK FOR DTC*

(a) After clearing DTCs, recheck for DTCs.

Body Electrical > Navigation System > Clear DTCs Body Electrical > Navigation System > Trouble Codes

15.	PERFORM CONFIRMATION TEST

END

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