Lexus GS300/400 (2000 year). Manual - part 67

BE0GE–03

I04310

Wire Harness Side

I04189

Wire Harness Side

Connector ”B”

Connector ”D”

Connector ”C”

Connector ”A”

–

BODY ELECTRICAL

AUDIO SYSTEM

BE–217

2518

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 connection

Condition

Specified condition

8 – Ground

Constant

Continuity

5 – Ground

Constant

Battery positive voltage

10 – Ground

Ignition switch LOCK

No voltage

10 – Ground

Ignition switch ACC or ON

Battery 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 connection

Condition

Specified condition

B7 – Ground

Constant

Continuity

C12 – Ground

Ignition switch LOCK and radio switch ON

No voltage

C12 – Ground

Ignition switch ACC or ON and radio switch ON

Battery positive voltage

B4 – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.

I04190

Wire Harness Side

Connector ”A”

Connector ”B”

BE–218

–

BODY ELECTRICAL

AUDIO SYSTEM

2519

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 connection

Condition

Specified condition

A2 – Ground

Constant

Continuity

A4 – Ground

Constant

Battery positive voltage

A1 – Ground

Ignition switch LOCK

No voltage

A1 – Ground

Ignition switch ACC or ON

Battery 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 ELECTRICAL

AUDIO SYSTEM

BE–219

2520

4.

NAKAMICHI made:
INSPECT CD AUTO CHANGER CIRCUIT

Disconnect connectors from CD auto changer and inspect the
connector on the wire harness side.

Tester connection

Condition

Specified condition

14 – Ground

Constant

Continuity

4 – Ground

Ignition switch LOCK

No voltage

4 – Ground

Ignition switch ACC or ON

Battery positive voltage

5 – Ground

Constant

Battery 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 ”B”

Connector ”D”

Connector ”C”

Connector ”A”

BE–220

–

BODY ELECTRICAL

AUDIO SYSTEM

2521

5.

NAKAMICHI made:
INSPECT POWER AMPLIFIER CIRCUIT

Disconnect the connector from power amplifier and inspect the
connector on the wire harness side.

Tester connection

Condition

Specified condition

A1 – Ground

A4 – Ground

D1 – Ground

Constant

Continuity

A6 – Ground

Ignition switch LOCK and radio switch ON

No voltage

A6 – Ground

Ignition switch ACC or ON and radio switch ON

Battery positive voltage

A2 – Ground

Constant

Battery positive voltage

A5 – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.