1991 LEXUS SC400 manual radio set

TROUBLESHOOTING
NOTICE: When replacing the internal mechanism (ECU part) of the audio system,\
be careful that no part
of your body or clothing comes in contact with the terminals of the lead\
s from the IC, etc. of the replace-
ment part (spare part).
HINT:
This inspection procedure is simple troubleshooting which should be carried \
out on the vehicle during
system operation and is based on the assumption that the cause of trouble lies\
with the system
components (excluding the wires and connectors, etc.).
Always inspect the trouble taking the following items into consideration\
.
Open or short circuit of the wire harness

Connector or terminal connection fault

The cassette tape or compact disc itself may be causing the trouble, so whe\
n troubleshooting the tape
player or CD player, always use a different cassette tape or compact disc first of all to check operation
of the tape player or CD player.

For some of problems in the following problem chart, the AUDIO SYSTEM CHECKER can be used
to inspect malfunctions of the Radio or Tape Player, and the CD PLAYER CHECKER can be used to
inspect the CD player.
The portions indicated by on the flow charts on the following pages can be\
inspected using a CHECK-
ER.
For instructions on how to connect the checker to the vehicle and how to\
use the checker, please refer
to the instruction Manual for AUDIO SYSTEM CHECKER or CD PLAYER CHECKER.
BE±218
±
BODY ELECTRICAL SYSTEM AUDIO SYSTEM
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