Section 377 (Antenna): Inspection

WARNING: This page is about a different car, the 2004 Lexus GS 430 and 2004 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

Auto antenna models: INSPECT ANTENNA MOTOR
1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 5.
2. Check that the motor turns (moves upward).
  NOTE: These tests must be done quickly (within 3-5 seconds) to prevent the coil from burning out.
  
  Fig 1: Checking Motor Turns (Moves Upward)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Then, reverse the polarity, check that the motor turns the opposite way (moves downward).
  NOTE: These tests must be done quickly (within 3 - 5 seconds) to prevent the coil from burning out.
Fig 2: Checking Motor Turns (Moves Downward)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Auto antenna models: INSPECT ANTENNA MOTOR CONTROL RELAY CIRCUIT

Disconnect the connector from the relay and inspect the connector on wire harness side, as shown in the chart below.

Fig 3: Inspecting Connector On Wire Harness Side

TESTER CONNECTION

Tester connection	Condition	Specified condition
7 - Ground	Constant	Continuity
1 - Ground	Ignition switch ACC or ON, and radio switch ON and Others	No voltage
1 - Ground	Ignition switch ACC or ON, and radio switch ON and AM	Battery positive voltage
2 - Ground	Ignition switch ACC or ON, and radio or tape or CD switch OFF	No voltage
2 - Ground	Ignition switch ACC or ON, and radio or tape or CD switch ON	Battery positive voltage
3 - Ground	Constant	Battery positive voltage
4 - Ground	Ignition switch ACC or ON, and radio switch ON and Others	No voltage
4 - Ground	Ignition switch ACC or ON, and radio switch ON and AM or FM (87.9 - 96.0 MHz)	Battery positive voltage
5 - Ground	Ignition switch ACC or ON, and radio switch OFF	No voltage
5 - Ground	Ignition switch ACC or ON, and radio switch ON	Battery positive voltage
6 - Ground	Ignition switch ACC or LOCK	No voltage
6 - Ground	Ignition switch ON	Battery positive voltage
8 - Ground	Ignition switch LOCK	No voltage
8 - Ground	Ignition switch ACC or ON	Battery positive voltage

If circuit is as specified, replace the relay.