2000 LEXUS GS400 Service Repair Manual

BE0GE±03
I04310
Wire Harness Side
I04189
Wire Harness Side
Connector ºBº
Connector ºDº Connector ºCº Connector ºAº
± BODY ELECTRICALAUDIO SYSTEM
BE±217
2518 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. Except NAKAMICHI made:
INSPECT CD AUTO CHANGER CIRCUIT
Disconnect connectors from CD auto changer and inspect the
connector on the wire harness side.
Tester connectionConditionSpecified condition
8 ± GroundConstantContinuity
5 ± GroundConstantBattery positive voltage
10 ± GroundIgnition switch LOCKNo voltage
10 ± GroundIgnition switch ACC or ONBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
HINT:

Check the wire harness between the radio receiver as-
sembly and the CD auto changer.

Since the signals to and from the MUTE, R±, R+, L±, L+,
TX
± and TX+ terminals are serial signals, they cannot or-
dinarily be measured with a tester.
2. Except NAKAMICHI made:
INSPECT POWER AMPLIFIER CIRCUIT
Disconnect the connector from power amplifier and inspect the
connector on the wire harness side.
Tester connectionConditionSpecified condition
B7 ± GroundConstantContinuity
C12 ± GroundIgnition switch LOCK and radio switch ONNo voltage
C12 ± GroundIgnition switch ACC or ON and radio switch ONBattery positive voltage
B4 ± GroundConstantBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.

I04190
Wire Harness Side
Connector ºAº Connector ºBº BE±218
± BODY ELECTRICALAUDIO SYSTEM
2519 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. Except NAKAMICHI made:
INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT
Disconnect the connectors from the radio receiver assembly,
and inspect the connector on the wire harness side.
Tester connectionConditionSpecified condition
A2 ± GroundConstantContinuity
A4 ± GroundConstantBattery positive voltage
A1 ± GroundIgnition switch LOCKNo voltage
A1 ± GroundIgnition switch ACC or ONBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
HINT:
Check the wire harness between radio receiver assembly and
the CD auto changer, between radio receiver assembly and
power amplifier.

I04188
Wire Harness Side
± BODY ELECTRICALAUDIO SYSTEM
BE±219
2520 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
4. NAKAMICHI made:
INSPECT CD AUTO CHANGER CIRCUIT
Disconnect connectors from CD auto changer and inspect the
connector on the wire harness side.
Tester connectionConditionSpecified condition
14 ± GroundConstantContinuity
4 ± GroundIgnition switch LOCKNo voltage
4 ± GroundIgnition switch ACC or ONBattery positive voltage
5 ± GroundConstantBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.
HINT:

Check the wire harness between the radio receiver as-
sembly and the CD auto changer.

Since the signals to and from the MUTE, R±, R+, L±, L+,
TX
± and TX+ terminals are serial signals, they cannot or-
dinarily be measured with a tester.

I04309
Wire Harness Side
Connector ºBº
Connector ºDº Connector ºCº Connector ºAº BE±220
± BODY ELECTRICALAUDIO SYSTEM
2521 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
5. NAKAMICHI made:
INSPECT POWER AMPLIFIER CIRCUIT
Disconnect the connector from power amplifier and inspect the
connector on the wire harness side.
Tester connectionConditionSpecified condition
A1 ± Ground
A4 ± Ground
D1 ± Ground
ConstantContinuity
A6 ± GroundIgnition switch LOCK and radio switch ONNo voltage
A6 ± GroundIgnition switch ACC or ON and radio switch ONBattery positive voltage
A2 ± GroundConstantBattery positive voltage
A5 ± GroundConstantBattery positive voltage
If the circuit is not as specified, inspect the circuits connected
to other parts.

I04189
Wire Harness Side
Connector ºBº
Connector ºDº Connector ºCº Connector ºAº
± BODY ELECTRICALAUDIO SYSTEM
BE±221
2522 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. NAKAMICHI made:
INSPECT RADIO RECEIVER ASSEMBLY CIRCUIT
Disconnect the connectors from the radio receiver assembly,
and inspect the connector on the wire harness side.
Tester connectionConditionSpecified condition
D3 ± GroundConstantContinuity
D4 ± GroundConstantBattery positive voltage
D1 ± GroundIgnition switch LOCKNo voltage
D1 ± GroundIgnition switch ACC or ONBattery positive voltage
*: w/ LEXUS navigation system
If the circuit is not as specified, inspect the circuits connected
to other parts.
HINT:
Check the wire harness between radio receiver assembly and
the CD auto changer, between radio receiver assembly and
power amplifier.
7. INSPECT GLASS IMPRINTED ANTENNA
(Use same procedure as for ºINSPECT DEFOGGER WIRESº
on page BE±108.)
8. REPAIR GLASS IMPRINTED ANTENNA
(Use same procedure as for ºREPAIR DEFOGGER WIRESº on
page BE±108.)

BE10Y±02
I01373
Radio Assembly
Antenna Choke Coil
Antenna Cable
USA/CANADA Models BE±222
± BODY ELECTRICALANTENNA
2523 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
ANTENNA
LOCATION

I05320
Radio Assembly
Antenna Choke Coil
Antenna Cable
Motor Antenna
TAIWAN Models
± BODY ELECTRICALANTENNA
BE±223
2524 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

BE0GA±03
I04291
D
A
BCE
View ºAº View ºBº
View ºDº
View ºEºView ºCº
Connector Earth Nut
Connector (Orange)
Connector (White)Connector
Earth Bolt
Connector
Choke Coil Antenna
: Clamp
BE±224
± BODY ELECTRICALANTENNA
2525 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS