| Last Modified: 7-3-2017 | 6.8:8.0.40 | Doc ID: RM000001B5R003X |
| Model Year Start: 2007 | Model: LX470 | Prod Date Range: [08/2006 - ] |
| Title: NAVIGATION: NAVIGATION SYSTEM: No Sound can be Heard from Speakers; 2007 MY LX470 [08/2006 - ] | ||
|
No Sound can be Heard from Speakers |
INSPECTION PROCEDURE
PROCEDURE
|
1. |
SERVICE CHECK MODE (CHECK RADIO RECEIVER ASSEMBLY) |
(a) Check the radio receiver assembly.
| NG |
|
|
|
2. |
CHECK WIRE HARNESS (RADIO RECEIVER ASSEMBLY - BATTERY AND BODY GROUND) |
(a) Disconnect the R37 receiver connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
R37-20 (GND) - Body ground |
Below 1 Ω |
(c) Measure the voltage of the wire harness side connector.
Standard voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R37-1 (+B) - Body ground |
Always |
10 to 14 V |
|
R37-11 (ACC) - Body ground |
Ignition switch ACC |
10 to 14 V |
| NG |
|
|
|
3. |
CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - BATTERY AND BODY GROUND) |
(a) Disconnect the S18 and S19 amplifier connectors.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
S18-12 (E) - Body ground |
Below 1 Ω |
|
S18-13 (GND2) - Body ground |
Below 1 Ω |
(c) Measure the voltage of the wire harness side connector.
Standard voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S18-7 (+B) - Body ground |
Always |
10 to 14 V |
|
S18-16 (+B2) - Body ground |
Always |
10 to 14 V |
|
S19-2 (ACC) - Body ground |
Ignition switch ACC |
10 to 14 V |
| NG |
|
|
|
4. |
CHECK WIRE HARNESS (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER) |
| NG |
|
|
|
5. |
INSPECT STEREO COMPONENT AMPLIFIER |
(a) Measure the voltage of the amplifier.
Standard voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S19-12 (MUTE) - Body ground |
Audio is sounding |
Above 3.5 V |
| NG |
|
| OK |
|
|
|