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Home >> Lexus >> 2012 >> CT 200h L4-1.8L (2ZR-FXE) Hybrid >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Testing and Inspection >> Component Tests and General Diagnostics >> Audio and Visual System (W/O Navigation System) >> Speaker Circuit >> Part 1

Part 1





AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/o Navigation System): Speaker Circuit
- Speaker Circuit

DESCRIPTION

for 10 Speakers:

* If there is a short in a speaker circuit, the stereo component amplifier assembly detects it and stops output to the speakers.

* Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, DCM (telematics transceiver)*1 or speakers.

* If a short is detected in a speaker circuit, no sound can be heard from the speakers.

for 6 Speakers:

* If there is a short in this circuit, the radio receiver assembly detects it and stops output to the speakers.

* Thus sound cannot be heard from the speakers even if there is no malfunction in the radio receiver assembly, DCM (telematics transceiver)*1 or speakers.

* If a short is detected in a speaker circuit, no sound can be heard from the speakers.

* *1: w/ Manual (SOS) Switch

WIRING DIAGRAM

1. for 10 Speakers









2. for 6 Speakers





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM MODEL

(a) Choose the model to be inspected.

Result:





B -- CHECK HARNESS AND CONNECTOR
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors from the stereo component amplifier assembly, DCM (telematics transceiver)*1 and speakers.

*1: w/ Manual (SOS) Switch

(b) Measure the resistance between the front No. 1 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(c) Measure the resistance between the front No. 1 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(d) w/o Manual (SOS) Switch:

Measure the resistance between the front No. 2 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(e) w/ Manual (SOS) Switch:

Measure the resistance between the stereo component amplifier assembly and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:





(f) w/ Manual (SOS) Switch:

Measure the resistance between the front No. 2 speaker assembly RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:





(g) Measure the resistance between the front No. 2 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(h) w/o Manual (SOS) Switch:

Measure the resistance between the front No. 3 speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(i) w/ Manual (SOS) Switch:

Measure the resistance between the front No. 3 speaker assembly RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:





(j) Measure the resistance between the front No. 3 speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(k) Measure the resistance between the front No. 4 speaker assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(l) Measure the resistance between the rear speaker assembly RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(m) Measure the resistance between the rear speaker assembly LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(n) Measure the resistance between the No. 1 speaker assembly with box and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(o) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(p) w/ Manual (SOS) Switch:

Measure the resistance between the DCM (telematics transceiver) and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(q) Proceed to the next step based on the inspection result.

Result:





B -- INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

3. CHECK HARNESS AND CONNECTOR

(a) Disconnect the connectors from the radio receiver assembly, DCM (telematics transceiver)*1 and speakers.

*1: w/ Manual (SOS) Switch

(b) w/o Manual (SOS) Switch:

Measure the resistance between the front No. 1 speaker assembly RH and the radio receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(c) w/ Manual (SOS) Switch:

Measure the resistance between the radio receiver assembly and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:





(d) w/ Manual (SOS) Switch:

Measure the resistance between the front No. 1 speaker assembly RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:





(e) Measure the resistance between the front No. 1 speaker assembly LH and the radio receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(f) w/o Manual (SOS) Switch:

Measure the resistance between the radio setting condenser and the radio receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(g) w/ Manual (SOS) Switch:

Measure the resistance between the radio setting condenser and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

Standard Resistance:





(h) Measure the resistance between the front No. 2 speaker assembly RH and the radio setting condenser to check for an open circuit in the wire harness.

Standard Resistance:





(i) Measure the resistance between the radio setting condenser and the radio receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(j) Measure the resistance between the front No. 2 speaker assembly LH and the radio setting condenser to check for an open circuit in the wire harness.

Standard Resistance:





(k) Measure the resistance between the rear speaker assembly RH and the radio receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(l) Measure the resistance between the rear speaker assembly LH and the radio receiver assembly to check for an open circuit in the wire harness.

Standard Resistance:





(m) Measure the resistance between the radio receiver assembly and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(n) Measure the resistance between the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(o) w/ Manual (SOS) Switch:

Measure the resistance between the DCM (telematics transceiver) and body ground to check for a short circuit in the wire harness.

Standard Resistance:





(p) Proceed to the next step based on the inspection result.

Result:





B -- INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

4. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Resistance check





(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Removal
OK -- Continue to next step.
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