Toyota Tacoma 2015-2018 Service Manual: LVDS Signal Malfunction (from Extension Module) (B1532,B156C)
DESCRIPTION
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1532 |
When one of the conditions below is met:
|
|
|
B156C |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary. (w/ SDARS System)
PROCEDURE
|
1. |
CHECK DTC |
(a) Clear the DTCs (See page .gif)
).
(b) Check for DTCs (See page ).
OK:
No DTCs are output.
| OK | .gif) |
USE SIMULATION METHOD TO CHECK |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY) |
(a) Disconnect the N19, N27 and N28 navigation receiver assembly connectors.
(b) Disconnect the S52, S53 and S54 stereo component tuner assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N27-1 (USV4) - S53-1 (USV4) |
Always |
Below 1 Ω |
|
N27-2 (US4-) - S53-2 (US4-) |
Always |
Below 1 Ω |
|
N27-3 (US4+) - S53-3 (US4+) |
Always |
Below 1 Ω |
|
N27-4 (UGO4) - S53-4 (UGO4) |
Always |
Below 1 Ω |
|
N27-5 (USG4) - S53-5 (USG4) |
Always |
Below 1 Ω |
|
N19-4 (+B2) - S52-4 (+B) |
Always |
Below 1 Ω |
|
N19-3 (ACC2) - S52-3 (ACC2) |
Always |
Below 1 Ω |
|
N19-8 (GND2) - S52-8 (GND2) |
Always |
Below 1 Ω |
|
N28-1 (LVDS) - S54-1 (LVDS) |
Always |
Below 1 Ω |
|
N27-1 (USV4) - Body ground |
Always |
10 kΩ or higher |
|
N27-2 (US4-) - Body ground |
Always |
10 kΩ or higher |
|
N27-3 (US4+) - Body ground |
Always |
10 kΩ or higher |
|
N27-4 (UGO4) - Body ground |
Always |
10 kΩ or higher |
|
N27-5 (USG4) - Body ground |
Always |
10 kΩ or higher |
|
N19-4 (+B2) - Body ground |
Always |
10 kΩ or higher |
|
N19-3 (ACC2) - Body ground |
Always |
10 kΩ or higher |
|
N19-8 (GND2) - Body ground |
Always |
10 kΩ or higher |
|
N28-1 (LVDS) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK NO. 1 NAVIGATION WIRE |
(a) Replace the No. 1 navigation wire with a known good one (See page
).
(b) Clear the DTCs (See page ).
(c) Check for DTCs (See page ).
OK:
No DTCs are output.
| OK | |
END (NO. 1 NAVIGATION WIRE WAS DEFECTIVE) |
|
|
4. |
CHECK STEREO COMPONENT TUNER ASSEMBLY |
(a) Replace the stereo component tuner assembly with a known good one (See page
).
(b) Clear the DTCs (See page ).
(c) Check for DTCs (See page ).
OK:
No DTCs are output.
| OK | |
END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE) |
| NG | |
REPLACE NAVIGATION RECEIVER ASSEMBLY |
Lost Communication with Meter (B1324)
DESCRIPTION
This DTC is stored when a communication error occurs between the navigation receiver
assembly and combination meter assembly.
DTC No.
DTC Detection Condition
...
HD Radio Tuner Malfunction (B1551,B15A0,B15AD,B15B0,B15B3,B15B4,B15B7)
DESCRIPTION
These DTCs are stored when a malfunction occurs in the navigation receiver assembly.
DTC No.
DTC Detection Condition
Trouble Area
B1551
...
Other materials:
Tachometer Malfunction
DESCRIPTION
In this circuit, the meter CPU receives engine speed signals from the ECM using
the CAN communication system (CAN V1 Bus). The meter CPU displays the engine speed
calculated based on the data received from the ECM.
WIRING DIAGRAM
PROCEDURE
1.
CHECK CAN CO ...
Low Pitched Horn
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT LOW PITCHED HORN ASSEMBLY
(a) Check the operation.
(1) Apply battery voltage to the terminal 1 and body ground, and check
that the low pitched horn assembly sounds.
Text in Illustration
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY
(a) Check the operation of the front seat cushion heater assembly.
(1) Apply battery voltage and check the operation of the front seat cushion
heater assembly.
OK:
Connection
...