1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 DESCRIPTION & OPERATION The antenna automatically extends when the radio and ignition are turned on and retracts when either is turned off. COMPONENT LOCATION COMPONENT LOCATIONS CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. Component Location Body Ground BI Above left rear wheelwell. See Fig. 2 . Body Ground BK In right, rear side of trunk. See Fig. 2 . ECU-IG & RADIO No. 2 Fuses In passenger compartment fuse block Passenger Compartment Fuse Block Behind left side of dash RADIO No. 1 (20 A) Fuse Left side of engine compartment, in fuse/relay (J/B 2) box 1990 Lexus LS 400 1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 1990 Lexus LS 400 1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 5:19:13 PM Page 1 5:19:15 PM Page 1
Fig. 1: Locating Power Antenna Components Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Fig. 2: Locating Grounds BI & BK Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. ON-VEHICLE SERVICE GLASS PRINTED ANTENNA REPAIR 1. Clean broken wire tips with a grease, wax and silicone remover. 2. Place the masking tape along both sides of the wire to be repaired. See Fig. 3 . 3. Thoroughly mix the repair agent (DuPont paste No. 4817). 4. Use a fine tip brush, apply a small amount to the wire. 5. After a few minutes, remove the masking tape. 6. Allow the repair to stand at least 24 hours. 1990 Lexus LS 400 1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 5:19:13 PM Page 2
Fig. 3: Repairing Antenna Grid Filament TROUBLE SHOOTING ANTENNA See Fig. 4 . 1990 Lexus LS 400 1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 5:19:13 PM Page 3
Fig. 4: Testing Antenna 1990 Lexus LS 400 1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 5:19:13 PM Page 4
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. CIRCUIT TESTS POWER ANTENNA CIRCUIT Disconnect the motor antenna connector from the body wire harness and inspect the connector on body wire harness side. See Fig. 5 and Fig. 6 . If circuit is not as specified, inspect radio or wire harness. If circuit is as specified, replace power antenna. See POWER ANTENNA under REMOVAL & INSTALLATION. Fig. 5: Identifying Power Antenna Connector Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 1990 Lexus LS 400 1990 ACCESSORIES & EQUIPMENT Antenna Systems - LS 400 5:19:13 PM Page 5
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