Navigation Receiver Assembly Power Source Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY POWER SOURCE)

Disconnect the H97 multi-media module receiver assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H97-12 (GND1) - Body ground	Always	Below 1 Ω

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

Standard Voltage

Tester Connection	Condition	Specified Condition
H97-17 (+B1) - H97-12 (GND1)	Power switch off	11 to 14 V
H97-16 (ACC1) - H97-12 (GND1)	Power switch on (ACC)	11 to 14 V
H97-15 (IG) - H97-12 (GND1)	Power switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]