GSIC - Global Service Information Center

# AUDIO AND VISUAL SYSTEM > TERMINALS OF ECU

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CHECK RADIO RECEIVER ASSEMBLY

1. Disconnect the R1 receiver connector.

2. Measure the resistance and voltage of the wire harness side connector.

   Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition
   GND (R1-7) - Body ground | BR - Body ground | Ground | Always | Below 1 Ω
   ACC (R1-3) - Body ground | GR - Body ground | ACC power supply | Ignition switch ACC | 10 to 14 V
   B (R1-4) - Body ground | L-Y - Body ground | Battery power supply | Always | 10 to 14 V
   ILL+ (R1-10) - Body ground | G - Body ground | Illumination signal | Lamp control switch TAIL | 10 to 14 V

   If the results are not as specified, there may be a malfunction on the wire harness side.

3. Reconnect the R1 receiver connector.

4. Measure the voltage of the connector.

   Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition
   RR+ (R2-1) - GND (R1-7) | R - BR | Sounds signal (rear right) | Audio system is operating | Waveform synchronized with sound is output
   RL+ (R2-2) - GND (R1-7) | B - BR | Sounds signal (rear left) | Audio system is operating | Waveform synchronized with sound is output
   RR- (R2-3) - GND (R1-7) | W - BR | Sounds signal (rear right) | Audio system is operating | Waveform synchronized with sound is output
   RL+ (R2-6) - GND (R1-7) | Y - BR | Sounds signal (rear left) | Audio system is operating | Waveform synchronized with sound is output
   FR+ (R1-1) - GND (R1-7) | LG - BR | Sounds signal (front right) | Audio system is operating | Waveform synchronized with sound is output
   FL+ (R1-2) - GND (R1-7) | P - BR | Sounds signal (front left) | Audio system is operating | Waveform synchronized with sound is output
   FR- (R1-5) - GND (R1-7) | L - BR | Sounds signal (front right) | Audio system is operating | Waveform synchronized with sound is output
   FL- (R1-6) - GND (R1-7) | V - BR | Sounds signal (front left) | Audio system is operating | Waveform synchronized with sound is output
   ANT (R1-8) - GND (R1-7) | B-W - BR | Power source of antenna | Radio switch ON and AM or FM | 10 to 14 V

   If the result is not as specified, the receiver may have a malfunction.