AUDIO AND VISUAL SYSTEM(for Radio Receiver Type) Speaker Circuit
| DTC Code | DTC Name |
|---|---|
| Speaker Circuit |
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
PROCEDURE
CHECK HARNESS AND CONNECTOR
Disconnect the E109 radio receiver assembly connector.
Disconnect the G1 and H1 front No. 1 speaker assembly connectors.
Disconnect the G4 and H5 front No. 2 speaker assembly connectors.
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
Tester Connection
Condition
Specified Condition
E109-1 (FR+) - G4-4 (TWR+)
Always
Below 1 Ω
E109-5 (FR-) - G4-2 (TWR-)
Always
Below 1 Ω
E109-2 (FL+) - H5-4 (TWL+)
Always
Below 1 Ω
E109-6 (FL-) - H5-2 (TWL-)
Always
Below 1 Ω
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
Tester Connection
Condition
Specified Condition
G4-3 (+) - G1-1
Always
Below 1 Ω
G4-1 (-) - G1-2
Always
Below 1 Ω
H5-3 (+) - H1-1
Always
Below 1 Ω
H5-1 (-) - H1-2
Always
Below 1 Ω
Measure the resistance between the radio receiver assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance
Tester Connection
Condition
Specified Condition
E109-1 (FR+) - Body ground
Always
10 kΩ or higher
E109-5 (FR-) - Body ground
Always
10 kΩ or higher
E109-2 (FL+) - Body ground
Always
10 kΩ or higher
E109-6 (FL-) - Body ground
Always
10 kΩ or higher
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
Tester Connection
Condition
Specified Condition
G4-3 (+) - Body ground
Always
10 kΩ or higher
G4-1 (-) - Body ground
Always
10 kΩ or higher
H5-3 (+) - Body ground
Always
10 kΩ or higher
H5-1 (-) - Body ground
Always
10 kΩ or higher
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
Remove the front No. 1 speaker assembly.
-
*a
Component without harness connected
(Front No. 1 Speaker Assembly)
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
1 - 2
Always
3.2 to 4.8 Ω
Result
Proceed to
OK
NG
INSPECT FRONT NO. 2 SPEAKER ASSEMBLY
Remove the front No. 2 speaker assembly.
-
*A
for RH
*B
for LH
*a
Component without harness connected
(Front No. 2 Speaker Assembly)
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Table 1. for RH Tester Connection
Condition
Specified Condition
4 (TWR+) - 2 (TWR-)
Always
10 kΩ or higher
1 (-) - 2 (TWR-)
Always
Below 1 Ω
3 (+) - 4 (TWR+)
Always
Below 1 Ω
Table 2. for LH Tester Connection
Condition
Specified Condition
4 (TWL+) - 2 (TWL-)
Always
10 kΩ or higher
1 (-) - 2 (TWL-)
Always
Below 1 Ω
3 (+) - 4 (TWL+)
Always
Below 1 Ω
Result
Proceed to
OK
NG
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY
Check that the malfunction disappears when a known good speaker is installed.
OK
Malfunction disappears.
Tip: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.
Result
Proceed to
OK
NG
OK END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)