Lexus ES: AV Signal Stoppage (Low Battery Voltage) (B158F)
DESCRIPTION
This DTC is stored when a video or audio signal is interrupted due to auxiliary battery voltage input to the radio 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 auxiliary battery voltage drops | -
Radio 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 receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
-
A communication malfunction DTC may be stored.
-
The radio 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 auxiliary battery voltage.
Standard Voltage:
11 to 15.5 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 |
3. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY POWER SOURCE) |
(a) Disconnect the G6 radio receiver assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
G6-4 (+B1) - Body ground | Power switch off | 11 to 14 V |
NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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SEE MORE:
DESCRIPTION Refer to DTC C1241. Click here DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note C1242 Open Circuit in IG1/IG2 Power Source Circuit 111 112
INF Code: 111
When the IG1 terminal voltage is less than 3.5 V, the IG2 terminal volta
INSPECTION PROCEDURE 1. INSPECT HAZARD WARNING SIGNAL SWITCH ASSEMBLY *a Component without harness connected (Hazard Warning Signal Switch Assembly) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Co
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