Toyota Corolla Cross: Ambient Illumination Light Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the operation of the following lights:
- Center tray illumination light (No. 1 interior illumination light assembly)
- Front Door Ambient Illumination Light
- Front door ambient illumination light LH (Front door trim board sub-assembly LH)
- Front door ambient illumination light RH (Front door trim board sub-assembly RH)
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1
for HEV Model: Click here
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for Gasoline Model: Click here
- *1: w/ Smart Key System
PROCEDURE
|
1. | PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Front Footwell Lights |
| OFF or ON |
- |
|
Tester Display |
|---|
| Front Footwell Lights |
|
Result | Proceed to |
|---|---|
|
OK | A |
|
NG (Center tray illumination light (No. 1 interior illumination light assembly) light does not come on) |
B |
| NG (Front door ambient illumination light RH (Front door trim board sub-assembly RH) do not come on) |
C |
| NG (Front door ambient illumination light LH (Front door trim board sub-assembly LH) do not come on) |
D |
| NG (All illuminations do not come on) |
E |
| A |
.gif) | USE SIMULATION METHOD TO CHECK |
| C |
| GO TO STEP 5 |
| D |
| GO TO STEP 8 |
| E |
| GO TO STEP 11 |
|
.gif)
| 2. |
INSPECT CENTER TRAY ILLUMINATION LIGHT (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY) |
Click here
| NG | | REPLACE CENTER TRAY ILLUMINATION LIGHT (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY) |
|
| 3. |
CHECK HARNESS AND CONNECTOR (CENTER TRAY ILLUMINATION LIGHT (NO. 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY) - POWER DISTRIBUTION BOX ASSEMBLY) |
(a) Disconnect the 8B and 8C power distribution box assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I225- 2(B) - 8B-44 | Always |
Below 1 Ω |
|
I225-1 (E) - 8C-18 | Always |
Below 1 Ω |
|
I225-2 (B) or 8B-44 - Body ground |
Always | 10 kΩ or higher |
|
I225-1 (E) or 8C-18 - Body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 4. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a | Component without harness connected (Power Distribution Box Assembly) |
- | - |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8C-18 - MB-16 (FSPT) |
Always | Below 1 Ω |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| 5. |
INSPECT FRONT DOOR AMBIENT ILLUMINATION LIGHT RH (FRONT DOOR TRIM BOARD SUB-ASSEMBLY RH) |
Click here
| NG | | REPLACE FRONT DOOR AMBIENT ILLUMINATION LIGHT RH (FRONT DOOR TRIM BOARD SUB-ASSEMBLY RH) |
|
| 6. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR AMBIENT ILLUMINATION LIGHT RH (FRONT DOOR TRIM BOARD SUB-ASSEMBLY RH) - POWER DISTRIBUTION BOX ASSEMBLY) |
(a) Disconnect the 8B and 8C power distribution box assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
K6- 2(+) - 8B-44 | Always |
Below 1 Ω |
|
K6-1 (-) - 8C-18 | Always |
Below 1 Ω |
|
K6-2 (+) or 8B-44 - Body ground |
Always | 10 kΩ or higher |
|
K6-1 (-) or 8C-18 - Body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 7. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a | Component without harness connected (Power Distribution Box Assembly) |
- | - |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8C-18 - MB-16 (FSPT) |
Always | Below 1 Ω |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| 8. |
INSPECT FRONT DOOR AMBIENT ILLUMINATION LIGHT LH (FRONT DOOR TRIM BOARD SUB-ASSEMBLY LH) |
Click here
| NG | | REPLACE FRONT DOOR AMBIENT ILLUMINATION LIGHT RH (FRONT DOOR TRIM BOARD SUB-ASSEMBLY RH) |
|
| 9. |
CHECK HARNESS AND CONNECTOR (FRONT DOOR AMBIENT ILLUMINATION LIGHT LH (FRONT DOOR TRIM BOARD SUB-ASSEMBLY LH) - POWER DISTRIBUTION BOX ASSEMBLY) |
(a) Disconnect the 8B and 8C power distribution box assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
L5- 2(+) - 8B-44 | Always |
Below 1 Ω |
|
L5-1 (-) - 8C-18 | Always |
Below 1 Ω |
|
L5-2 (+) or 8C-18 - Body ground |
Always | 10 kΩ or higher |
|
L5-1 (-) or 8C-18 - Body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 10. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a | Component without harness connected (Power Distribution Box Assembly) |
- | - |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8C-18 - MB-16 (FSPT) |
Always | Below 1 Ω |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| 11. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE - POWER DISTRIBUTION BOX ASSEMBLY) |
(a) Disconnect the 8H power distribution box assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8H-1 - Body ground | Ignition switch off |
11 to 14 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 12. |
CHECK POWER DISTRIBUTION BOX ASSEMBLY |
|
*a | Component without harness connected (Power Distribution Box Assembly) |
- | - |
(a) Disconnect the 8B power distribution box assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8H-1 - 8B-44 | Always |
Below 1 Ω |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
|
| 13. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a | Component without harness connected (Power Distribution Box Assembly) |
- | - |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
8C-18 - MB-16 (FSPT) |
Always | Below 1 Ω |
| OK | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
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