Radio Receiver Power Source Circuit: Procedure

1. Disconnect the radio receiver connector.
   Fig 1: Identifying E40 And E1 Radio Receiver Connectors

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E40-20 (E) - Body ground*1	Always	Below 1 Ω
   E1-7 (E) - Body ground*2	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E40-1 (B) - E40-20 (E)*1	Always	11 to 14 V
   E1-4 (B) - E1-7 (E)*2	Always	11 to 14 V
   E40-11 (ACC) - E40-20 (E)*1	Ignition switch ACC	11 to 14 V
   E1-3 (ACC) - E1-7 (E)*2	Ignition switch ACC	11 to 14 V

   • *1: for 7 Speakers
   • *2: Except for 7 Speakers

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2