CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU) AFS ECU Communication Stop Mode

DTC Code	DTC Name
	AFS ECU Communication Stop Mode

DESCRIPTION


Detection Item	Symptom	Trouble Area
AFS ECU Communication Stop Mode	Either condition is met: "Headlight swivel (AFS)" is not displayed on the CAN Bus Check screen of the GTS Click here Click here Click here Communication system DTCs (DTCs that start with U) that correspond to "AFS ECU Communication Stop Mode" in "DTC Combination Table" are output Click here Click here Click here	Headlight swivel ECU assembly branch line or connector2 Power source circuit of headlight swivel ECU assembly2 Headlight swivel ECU assembly ground circuit2 Headlight swivel ECU assembly2 Headlight leveling ECU assembly branch line or connector1 Power source circuit of headlight leveling ECU assembly1 Headlight leveling ECU assembly ground circuit1 Headlight leveling ECU assembly1

*1: except Sedan
*2: for Sedan

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note:

Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
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After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait at least 13 seconds.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.
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Inspect the fuses for circuits related to this system before performing the following procedure.

Tip:

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

CHECK VEHICLE TYPE

Check vehicle type.

Result


Result Result	Proceed to
for RHD	A
for LHD	B

CHECK FOR OPEN IN CAN BUS LINES (HEADLIGHT SWIVEL ECU ASSEMBLY BRANCH LINE)Click here

CHECK VEHICLE TYPE

Check vehicle type.

Result


Result Result	Proceed to
for Sedan	A
except Sedan	B

CHECK FOR OPEN IN CAN BUS LINES (HEADLIGHT SWIVEL ECU ASSEMBLY BRANCH LINE)Click here

CHECK FOR OPEN IN CAN BUS LINES (HEADLIGHT LEVELING ECU ASSEMBLY BRANCH LINE)

Disconnect the cable from the negative (-) battery terminal.

*a	Front view of wire harness connector (to Headlight Leveling ECU Assembly)

Disconnect the A182 headlight leveling ECU assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance


Tester Connection	Condition	Specified Condition
A182-6 (CANH) - A182-7 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Result


Result Result
OK
NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY)

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

*a	Front view of wire harness connector (to Headlight Leveling ECU Assembly)

Measure the resistance according to the value(s) in the table below.

Standard Resistance


Tester Connection	Condition	Specified Condition
A182-9 (E1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

Reconnect the cable to the negative (-) battery terminal.

*a	Front view of wire harness connector (to Headlight Leveling ECU Assembly)

Measure the voltage according to the value(s) in the table below.

Standard Voltage


Tester Connection	Condition	Specified Condition
A182-1 (IG) - Body ground	Ignition switch ON	11 to 14 V

Result


Result Result
OK
NG

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY

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REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

CHECK FOR OPEN IN CAN BUS LINES (HEADLIGHT SWIVEL ECU ASSEMBLY BRANCH LINE)

Disconnect the cable from the negative (-) battery terminal.

*a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)

Disconnect the A93 headlight swivel ECU assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance


Tester Connection	Condition	Specified Condition
A93-12 (CANH) - A93-13 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Result


Result Result
OK
NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY)

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

*a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)

Measure the resistance according to the value(s) in the table below.

Standard Resistance


Tester Connection	Condition	Specified Condition
A93-22 (E1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

Reconnect the cable to the negative (-) battery terminal.

Measure the voltage according to the value(s) in the table below.

Standard Voltage


Tester Connection	Condition	Specified Condition
A93-15 (IG) - Body ground	Ignition switch ON	11 to 14 V

Result


Result Result
OK
NG

REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY

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REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)