Navigation Receiver Assembly Power Source Circuit: Procedure

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BATTERY AND BODY GROUND)

Disconnect the D57 navigation receiver assembly connector.

Fig 1: Checking Harness And Connector (Navigation Receiver Assembly - Battery And Body Ground)
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Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
D57-7 (GND) - 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
D57-4 (B) - Body ground	Always	11 to 14 V
D57-3 (ACC) - Body ground	Ignition switch ACC	11 to 14 V

TEXT IN ILLUSTRATION

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

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