DESCRIPTION
The sound signals amplified by the radio receiver assembly are sent to the speakers from the radio receiver assembly via the speaker circuit.
If there is a short in a speaker 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 or speakers.
If a short is detected in a speaker circuit, no sound can be heard from the speakers.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
CHECK HARNESS AND CONNECTOR
Disconnect the connectors from the radio receiver assembly and speakers.
Measure the resistance between each of the front No. 2 speaker assemblies and the radio receiver assembly to check for an open circuit in the wire harness.
Standard Resistance | |||||||||||||||
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Measure the resistance between each of the front No. 1 speaker assemblies and the front No. 2 speaker assemblies to check for an open circuit in the wire harness.
Standard Resistance | |||||||||||||||
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Measure the resistance between each of the rear speaker assemblies and the radio receiver assembly to check for an open circuit in the wire harness.
Standard Resistance | |||||||||||||||
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Measure the resistance between the radio receiver assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance | |||||||||||||||||||||||||||
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Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.
Standard Resistance | |||||||||||||||
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NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
*A | for RH |
*B | for LH |
*a | Component without harness connected (Front No. 1 Speaker Assembly) |
Resistance check
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
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NG |
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here |
OK |
INSPECT FRONT NO. 2 SPEAKER ASSEMBLY
*A | for RH |
*B | for LH |
*a | Component without harness connected (Front No. 2 Speaker Assembly) |
Resistance check
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
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|
NG |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here |
OK |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY
Check that the malfunction disappears when a known good speaker is installed Click here.
OK |
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Malfunction disappears. |
Tech Tips
Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
Perform the above inspection on both LH and RH sides.
NG |
INSPECT REAR SPEAKER ASSEMBLY Click here |
OK |
END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)
INSPECT REAR SPEAKER ASSEMBLY
*A | for RH |
*B | for LH |
*a | Component without harness connected (Rear Speaker Assembly) |
Resistance check
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
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NG |
REPLACE REAR SPEAKER ASSEMBLY Click here |
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here