Toyota Avalon (XX50): AV Signal Stoppage (Low Battery Voltage) (B158F). Lost Communication with Meter (B1324). HD Radio Tuner Malfunction (B1551,B158D,B15A0,B15B0,B15B3,B15B7,B15BA,B15F9)
AV Signal Stoppage (Low Battery Voltage) (B158F)
DESCRIPTION
This DTC is
stored when a video or audio signal is interrupted due to battery
voltage input to the radio and display receiver assembly dropping
temporarily.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|
B158F | AV Signal Stoppage (Low Battery Voltage) |
A video or audio signal is interrupted when the battery voltage drops |
- Radio and display receiver assembly
- Harness or connector
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Depending on the parts that are replaced during vehicle inspection or
maintenance, performing initialization, registration or calibration may
be needed. Refer to Precaution for Audio and Visual System.
Click here 
- When replacing the radio and display receiver assembly, always replace
it with a new one. If a radio and display receiver assembly which was
installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. | CHECK VEHICLE SIGNAL (OPERATION CHECK) |
| (a) Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check.
Click here | |
(b) Measure the battery voltage.
Standard Voltage:
11 to 14 V
HINT:
This display is updated once per second.
| NG |
 | GO TO STEP 3 |
|
OK |
 | |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
| OK | |
END |
| NG |
| REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
| 3. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY POWER SOURCE) |
(a) Disconnect the G3 radio and display receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|
G3-4 (+B1) - Body ground |
Always | 11 to 14 V |
| OK |
| REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
Lost Communication with Meter (B1324)
DESCRIPTION
This DTC is
stored when a communication error occurs between the radio and display
receiver assembly and combination meter assembly.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|
B1324 | Lost Communication with Meter |
CAN reception error |
- Local bus communication line
- Combination meter power source circuit
- Radio and display receiver assembly
- Combination meter assembly
- Harness or connector
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Depending on the parts that are replaced during vehicle inspection or
maintenance, performing initialization, registration or calibration may
be needed. Refer to Precaution for Audio and Visual System.
Click here 
- When replacing the radio and display receiver assembly, always replace
it with a new one. If a radio and display receiver assembly which was
installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. | CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY POWER SOURCE) |
(a) Disconnect the G16 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|
G16-21 (ES) - Body ground |
Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|
G16-40 (B) - Body ground |
Always | 11 to 14 V |
|
G16-39 (IG+) - Body ground |
Engine switch on (IG) |
11 to 14 V |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK |
 | |
| 2. |
CHECK HARNESS AND CONNECTOR |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the G16 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|
G16-36 (TX+) - G16-37 (TX-) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK |
| REPLACE COMBINATION METER ASSEMBLY |
|
NG | |
| |
| 3. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY) |
(a) Disconnect the G2 radio and display receiver assembly connector.
(b) Disconnect the G16 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|
G2-5 (CNH1) - G16-36 (TX+) |
Always | Below 1 Ω |
|
G2-6 (CNL1) - G16-37 (TX-) |
Always | Below 1 Ω |
|
G2-5 (CNH1) or G16-36 (TX+) - Body ground |
Always | 10 kΩ or higher |
|
G2-6 (CNL1) or G16-37 (TX-) - Body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
HD Radio Tuner Malfunction (B1551,B158D,B15A0,B15B0,B15B3,B15B7,B15BA,B15F9)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the radio and display receiver assembly.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|
B1551 | HD Radio Tuner Malfunction |
When any of the following conditions is met:
- "HD Radio" tuner decorder malfunction
- "HD Radio" tuner audio output section malfunction
- "HD Radio" tuner decorder RF/IF malfunction
| Radio and display receiver assembly |
|
B158D | Video Signal Stoppage |
The internal video signal of the radio and display receiver assembly is interrupted |
Radio and display receiver assembly |
|
B15A0 | LAN Master Malfunction |
When either of the following conditions is met:
- Bus malfunction
- EEPROM error
| Radio and display receiver assembly |
|
B15B0 | Display Screen Malfunction |
Picture circuit (TFT unit) malfunction |
Radio and display receiver assembly |
|
B15B3 | Radio Tuner Malfunction |
When any of the following conditions is met:
- AM tuner PLL is unlocked
- FM tuner PLL is unlocked
- Tuner malfunction
| Radio and display receiver assembly |
|
B15B7 | Bluetooth Module Malfunction |
"Bluetooth" module malfunction |
Radio and display receiver assembly |
|
B15BA | XM Tuner Malfunction |
When either condition below is met:
- Internal IC malfunction
- Tuner malfunction
| Radio and display receiver assembly |
|
B15F9 | UART Communication Malfunction(for A/C) |
When either of the following conditions is met:
- Open in UART communication line is detected during radio and display receiver assembly startup routine
- Open in UART communication line is detected based on communication error
| Radio and display receiver assembly |
CAUTION / NOTICE / HINT
NOTICE:
- Depending on the parts that are replaced during vehicle inspection or
maintenance, performing initialization, registration or calibration may
be needed. Refer to Precaution for Audio and Visual System.
Click here 
- When replacing the radio and display receiver assembly, always replace
it with a new one. If a radio and display receiver assembly which was
installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
PROCEDURE
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
| OK |  |
USE SIMULATION METHOD TO CHECK |
| NG |
| REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY |
