| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM100000001HH64 |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [02/2019 - 12/2021] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Meter Illumination does not Dim at Night; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021] | ||
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Meter Illumination does not Dim at Night |
DESCRIPTION
In this circuit, the combination meter assembly receives auto dimmer signals from the main body ECU (multiplex network body ECU) via CAN communication. When the combination meter assembly receives an auto dimmer signal, it dims the meter illumination (warning and indicator lights).
The main body ECU (multiplex network body ECU) determines whether it is daytime or nighttime based on the waveform transmitted from the automatic light control sensor. If the main body ECU (multiplex network body ECU) determines that it is nighttime and the light control switch is in the tail, head, or AUTO position, the ECU sends an auto dimmer signal to the combination meter assembly.
According to this signal, the combination meter assembly dims the meter illumination.
HINT:
When the meter illumination does not dim at night, there may be a malfunction in the automatic light control sensor, main body ECU (multiplex network body ECU), CAN communication system, wire harness, connector, or combination meter assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
-
Before replacing the main body ECU (multiplex network body ECU), refer to smart key system (for Start Function).
for HV Model:
Click here
![2019 MY RAV4 HV [11/2018 - 10/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
for Gasoline Model:
Click here
HINT:
- Setting the meter illumination level to maximum brightness prevents the meter illumination from dimming when the light control switch is changed to the tail, head or AUTO position at night. Therefore, check the meter illumination setting before proceeding to the following steps.
-
The automatic light control sensor sensitivity can be customized.
w/ Headlight ECU without AFS:
Click here
w/o Headlight ECU:
Click here
w/ AFS:
Click here
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication DTCs are output.
for HV Model:
Click here
for Gasoline Model:
Click here
|
Result |
Proceed to |
|---|---|
|
CAN communication DTCs are not output. |
A |
|
CAN communication DTCs are output. |
B |
| B |
|
GO TO CAN COMMUNICATION SYSTEM for HV Model: Click here
for Gasoline Model: Click here
|
|
|
2. |
CHECK FOR DTC (LIGHTING SYSTEM) |
(a) Check if lighting system DTCs are output.
w/ Headlight ECU without AFS:
Click here
w/o Headlight ECU:
Click here
w/ AFS:
Click here
Body Electrical > Main Body > Trouble Codes
OK:
DTC B1244 is not output.
| NG |
|
GO TO DTC B1244 w/ Headlight ECU without AFS: Click here
w/o Headlight ECU: Click here
w/ AFS: Click here
|
|
|
3. |
CHECK COMBINATION METER ASSEMBLY |
(a) Replace the combination meter assembly with a new one.
Click here
(b) Check the operation.
OK:
The operation of the combination meter assembly returns to normal.
| OK |
|
END (COMBINATION METER ASSEMBLY IS DEFECTIVE) |
| NG |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
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