| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001HEPF |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [02/2019 - ] |
| Title: WINDOW / GLASS: WINDOW DEFOGGER SYSTEM: Rear Window Defogger System does not Operate; 2019 - 2024 MY RAV4 RAV4 HV [02/2019 - ] | ||
|
Rear Window Defogger System does not Operate |
DESCRIPTION
When the window defogger switch on the air conditioning control assembly is pressed, the operation signal is transmitted to the air conditioning amplifier assembly via LIN communication. When the air conditioning amplifier assembly receives the signal, it turns on the defogger relay (DEF) to operate the window defogger system.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
If the auxiliary battery voltage becomes low, window defogger system operation is canceled to prioritize supplying power to the power steering system.
for Type A:
Click here
![2019 - 2022 MY RAV4 RAV4 HV [02/2019 - 10/2022]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Type A): DATA LIST / ACTIVE TEST](/t3Portal/stylegraphics/info.gif)
for Type B:
Click here
PROCEDURE
|
1. |
CHECK AIR CONDITIONING SYSTEM |
(a) Check the air conditioning system.
-
for HV Model:
Click here
-
for Gasoline Model:
Click here
HINT:
Both the window defogger system operation signal and air conditioning system operation signal are transmitted to the air conditioning amplifier assembly via the same communication line.
OK:
The air conditioning system operates normally.
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (for HV Model) |
B |
|
NG (for Gasoline Model) |
C |
| B |
|
GO TO AIR CONDITIONING SYSTEM
|
| C |
|
|
|
2. |
CHECK AIR CONDITIONING CONTROL ASSEMBLY |
(a) Check that the defogger indicator illuminates when the defogger switch is on.
OK:
Defogger indicator illuminates.
| NG |
|
|
|
3. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Using the Techstream, perform the Active Test.
Click here
Body Electrical > Air Conditioner > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Defogger Relay (Rear) |
Defogger relay (DEF) |
OFF or ON |
- |
Body Electrical > Air Conditioner > Active Test
|
Tester Display |
|---|
|
Defogger Relay (Rear) |
OK:
Back door glass (defogger wire) warms up.
| NG |
|
|
|
4. |
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY |
(a) Replace the air conditioning amplifier assembly.
Click here
(b) Check that the window defogger system operates normally.
OK:
The window defogger system operates normally.
| OK |
|
END (AIR CONDITIONING AMPLIFIER ASSEMBLY IS DEFECTIVE) |
| NG |
|
|
5. |
CHECK HARNESS AND CONNECTOR (BACK DOOR GLASS [DEFOGGER WIRE] - BATTERY) |
|
(a) Disconnect the back door glass (defogger wire) connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
R2-1 (B) - Body ground |
Ignition switch ON, window defogger switch on |
11 to 14 V |
|
Ignition switch ON, window defogger switch off |
Below 1 V |
| NG |
|
|
|
6. |
CHECK HARNESS AND CONNECTOR (BACK DOOR GLASS [DEFOGGER WIRE] - BODY GROUND) |
|
(a) Disconnect the back door glass (defogger wire) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R22-1 (L) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
INSPECT DEFOGGER RELAY (DEF) |
(a) Remove the defogger relay (DEF) from the No. 1 engine room relay block.
(b) Inspect the defogger relay (DEF).
Click here
| NG |
|
REPLACE DEFOGGER RELAY (DEF) |
|
|
8. |
CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY [DEF] - BATTERY) |
|
(a) Remove the defogger relay (DEF) from the No. 1 engine room relay block. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
Defogger relay (DEF) terminal 2 - Body ground |
Ignition switch ON |
11 to 14 V |
|
Defogger relay (DEF) terminal 5 - Body ground |
Ignition switch off |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
9. |
CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY [DEF] - AIR CONDITIONING AMPLIFIER ASSEMBLY AND BACK DOOR GLASS [DEFOGGER WIRE]) |
(a) Remove the defogger relay (DEF) from the No. 1 engine room relay block.
(b) Disconnect the G47 air conditioning amplifier assembly connector.
(c) Disconnect the N2 radio setting condenser (noise filter) connector.
(d) Disconnect the R2 back door glass (defogger wire) connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Defogger relay (DEF) terminal 1 - G47-18 (RDFG) |
Always |
Below 1 Ω |
|
Defogger relay (DEF) terminal 3 - R2-1 (B) |
Always |
Below 1 Ω |
|
Defogger relay (DEF) terminal 1 or G47-18 (RDFG) - Body ground |
Always |
10 kΩ or higher |
|
Defogger relay (DEF) terminal 3 or R2-1 (B) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|