Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER ASSEMBLY

Check the resistance.

Standard: Built-in AMP

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
GND (R1-7) - Body ground	Constant	Below 1

Standard: Separate AMP

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
GND (R1-20) - Body ground	Constant	Below 1

Fig 1: Identifying GND & ACC Terminals

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Turn the ignition switch to the ACC position.

Measure the voltage.

Standard: Built-in AMP

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
B (R1-4) - GND (R1-7)	Constant	10 to 14 V
ACC (R1-3) - GND (R1-7)	Ignition switch ACC or ON	10 to 14 V

Standard: Separate AMP

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
B (R1-1) - GND (R1-20)	Constant	Below 1
ACC (R1-11) - GND (R1-20)	Ignition switch ACC or ON	10 to 14 V

Fig 2: Identifying ACC Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE