DTC U1C0F: Invalid Authentication Data Received From Steering Angle Sensor Module CH-Bus [11/2021 - ]: Procedure

1. Turn the ignition switch to ON.
2. Using the GTS, perform the DTC clear of the control module in which the DTC was detected.
3. Using the GTS, read the DTC of the control module in which it was detected.

   Is DTC U1C0F displayed? (Current code)

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

PERFORM INSTRUCTED PROCEDURES 

Currently, it is normal.

Result: 

A 

See step  2

1. Using the GTS, perform module registration (verification) of the control module in which the DTC was detected.

   Refer to UPDATE ECU SECURITY KEY [11/2021 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Using the GTS, perform the DTC clear of the control module in which the DTC was detected.
2. Using the GTS, read the DTC of the control module in which it was detected.

   Is DTC U1C0F displayed? (Current code)

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

END 

Result: 

A 

See step  4

1. Turn the ignition switch to off.
2. Disconnect the cable from the negative (-) battery terminal.
3. Disconnect the F64 DCM (telematics transceiver) connector.
4. Reconnect the cable to the negative (-) battery terminal.
5. Turn the ignition switch to ON.
6. Using the GTS, perform the DTC clear of the control module in which the DTC was detected.
7. Using the GTS, read the DTC of the control module in which it was detected.

   Is DTC U1C0F displayed? (Current code)

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [11/2021 - ] 

Result: 

A 

See step  5

1. Turn the ignition switch to off.
2. Disconnect the cable from the negative (-) battery terminal.
3. Disconnect the F61 navigation ECU assembly connector.
4. Reconnect the cable to the negative (-) battery terminal.
5. Turn the ignition switch to ON.
6. Using the GTS, perform the DTC clear of the control module in which the DTC was detected.
7. Using the GTS, read the DTC of the control module in which it was detected.

   Is DTC U1C0F displayed? (Current code)

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

REPLACE NAVIGATION ECU ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

A 

See step  6

1. Visually check if an incorrect, non-TOYOTA genuine module is installed in the CH bus line.

   Is an incorrect module installed?

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

See step  8

Result: 

A 

See step  7

1. Turn the ignition switch to off.
2. Remove the incorrect module.
3. Turn the ignition switch to ON.
4. Using the GTS, perform the DTC clear of the control module in which the DTC was detected.
5. Using the GTS, read the DTC of the control module in which it was detected.

   Is DTC U1C0F displayed? (Current code)

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

END 

Result: 

A 

See step  8

1. Reconnect the detected ECU connector.

   HINT: 

   • In order to check poor contact of the detected ECU, reconnect it.
   • If it is detected again, replace the detected ECU and perform registration.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  1