Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU [11/2017 - ]: Procedure

1. Disconnect the D197 radio and display receiver assembly connector.
2. Disconnect the D199 navigation ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D197-7 (SUP) - D199-21 (SUP)	Always	Below 1 Ω
   D197-7 (SUP) or D199-21 (SUP) - Body ground	Always	10 kΩ or higher

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU [11/2017 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR