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Home >> Lexus >> 2011 >> 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

If there is a short in a speaker circuit, the stereo component amplifier assembly detects the short 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.

* *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 stereo component amplifier 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 stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(c) 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:





(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 stereo component amplifier 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 stereo component amplifier 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 stereo component amplifier 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 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 LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

Standard Resistance:





(m) Measure the resistance between the stereo component amplifier 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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