Toyota Tundra (2015 year). Manual — part 70
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000005KS600BX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: NAVIGATION: NAVIGATION SYSTEM: B1532,B156C; LVDS Signal Malfunction (from Extension Module);
2015 MY Tundra [08/2014 - ]
DTC
B1532
LVDS Signal Malfunction (from Extension Module)
DTC
B156C
Extension Module Disconnected
DESCRIPTION
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
B1532
When either condition below is met:
Video signal (digital) is lost.
The stereo component tuner assembly is not connected while
the ignition switch is ON or ACC.
Communication between the navigation receiver assembly
and the stereo component tuner assembly is not possible
when the engine is started.
No. 1 navigation
wire
Stereo component
tuner assembly
Navigation receiver
assembly
Harness or
connector
B156C
WIRING DIAGRAM
NAVIGATION: NAVIGATION SYSTEM: B1532,B156C; LVDS Signa...
INSPECTION PROCEDURE
NOTICE:
PROCEDURE
1.
CHECK FOR DTC
(a) Clear the DTCs
.
(b) Check for DTCs
.
OK:
No DTCs are output.
NG
GO TO STEP 2
NAVIGATION: NAVIGATION SYSTEM: B1532,B156C; LVDS Signa...
OK
OK
USE SIMULATION METHOD TO CHECK
2.
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO
COMPONENT TUNER ASSEMBLY)
(a) Disconnect the K1 and L1 navigation receiver assembly connectors.
(b) Disconnect the K2 and L3 stereo component tuner assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
K1-1 (USV4) - K2-1 (USV4)
Always
Below 1 Ω
K1-2 (US4-) - K2-2 (US4-)
Always
Below 1 Ω
K1-3 (US4+) - K2-3 (US4+)
Always
Below 1 Ω
K1-4 (UGD4) - K2-4 (UGD4)
Always
Below 1 Ω
K1-5 (USG4) - K2-5 (USG4)
Always
Below 1 Ω
L1-4 (+B2) - L3-4 (+B)
Always
Below 1 Ω
L1-3 (ACC2) - L3-3 (ACC2)
Always
Below 1 Ω
L1-8 (GND2) - L3-8 (GND2)
Always
Below 1 Ω
K1-1 (USV4) - Body ground
Always
10 kΩ or higher
K1-2 (US4-) - Body ground
Always
10 kΩ or higher
K1-3 (US4+) - Body ground
Always
10 kΩ or higher
K1-4 (UGD4) - Body ground
Always
10 kΩ or higher
K1-5 (USG4) - Body ground
Always
10 kΩ or higher
L1-4 (+B2) - Body ground
Always
10 kΩ or higher
L1-3 (ACC2) - Body ground
Always
10 kΩ or higher
L1-8 (GND2) - 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.
NAVIGATION: NAVIGATION SYSTEM: B1532,B156C; LVDS Signa...
for Column Shift Type:
for Floor Shift Type:
(b) Clear the DTCs
.
(c) Check for DTCs
.
OK:
No DTCs are output.
NG
GO TO STEP 4
OK
END (NO. 1 NAVIGATION WIRE IS DEFECTIVE)
4.
CHECK STEREO COMPONENT TUNER ASSEMBLY
(a) Replace the stereo component tuner assembly with a known good one.
for Column Shift Type:
for Floor Shift Type:
(b) Clear the DTCs
.
(c) Check for DTCs
.
OK:
No DTCs are output.
Result
RESULT
PROCEED TO
OK
A
NG (for Column Shift Type)
B
NG (for Floor Shift Type)
C
B
REPLACE NAVIGATION RECEIVER ASSEMBLY
C
REPLACE NAVIGATION RECEIVER ASSEMBLY
A
END (STEREO COMPONENT TUNER ASSEMBLY IS
DEFECTIVE)
NAVIGATION: NAVIGATION SYSTEM: B1532,B156C; LVDS Signa...
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