DTC B153A: GVIF Disconnected (from Extension Module to H/U) [12/2019 - 10/2022]: Procedure

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Press the "MAP" switch and check for DTCs.

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

NG 

See step  2

1. Disconnect the d5 radio receiver assembly connector.
2. Disconnect the d1 navigation ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Radio Receiver Assembly)
   *b	Front view of wire harness connector (to Navigation ECU)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   d5-1 (GV2-) - d1-1 (GVO-)	Always	Below 1 Ω
   d5-2 (GV2+) - d1-2 (GVO+)	Always	Below 1 Ω
   d5-3 (GVG2) - d1-3 (GVG1)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Replace the navigation ECU with a new or known good one.

   Refer to REMOVAL [12/2019 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

2. Press the "MAP" switch and check for DTCs.

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (NAVIGATION ECU IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]