DESCRIPTION
The main body ECU (multiplex network body ECU) controls the operation of the following lights:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
HINT:
The DOME CUT relay supplies power to the interior lights. If all the lights that use power from the DOME CUT relay do not turn on, check the interior light auto cut circuit first.
Click here
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Main Body > Active Test
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
---|---|---|---|
Illuminated Entry System |
Turns on the lights that are controlled by the illuminated entry system.* |
ON or OFF |
- |
Click here
Tester Display |
---|
Illuminated Entry System |
OK:
All lights that are controlled by the illuminated entry system come on.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
|
2. |
INSPECT MAP LAMP ASSEMBLY |
(a) Remove the map light assembly.
Click here
(b) Inspect the map light assembly.
Click here
NG | ![]() |
REPLACE MAP LAMP ASSEMBLY |
|
3. |
CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - NO. 1 ROOM LIGHT ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R2-12(+B1) - R2-4 (RLMP) |
No. 1 room light switch in DOOR position |
Below 1 Ω |
No. 1 room light switch in ON position |
10 kΩ or higher |
|
R2-12 (+B1) or R2-4 (RLMP) - Body ground |
No. 1 room light switch in DOOR position |
10 kΩ or higher |
NG | ![]() |
REPLACE NO. 1 ROOM LIGHT ASSEMBLY |
|
4. |
CHECK HARNESS AND CONNECTOR (DOME CUT RELAY - MAP LIGHT ASSEMBLY) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R2-12 (+B1) - Body ground |
Battery saving function not operating |
11 to 14 V |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the 3D instrument panel junction block assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R2-10 (DOOR) - 3D-29 |
Always |
Below 1 Ω |
R2-10 (DOOR) or 3D-29 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the instrument panel junction block assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here
(c) Measure the resistance according to the value(s) in the table below.
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3D-29 - MB-1 (ILE) |
Always |
Below 1 Ω |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
NG | ![]() |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
Toyota CH-R Service Manual > Navigation System: Reverse Signal Circuit between Radio Receiver Assembly and Navigation ECU
DESCRIPTION
This circuit includes the navigation ECU and radio and display receiver assembly.
WIRING DIAGRAM
PROCEDURE
1.
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION
ECU)
(a) Disconnect the F130 radio and display receiver a ...
Toyota CH-R Service Manual > Audio And Visual System(for Radio And Display Type): Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the radio and display receiver assembly
detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers even if there is no malfunction
in the radio and display receiver assembly, DCM (telematics transceiver)*1 or ...