| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Window/Glass | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002LI800GX |
| Title: WINDOW / GLASS: WINDOW DEFOGGER SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Rear Window Defogger System does not Operate |
DESCRIPTION
When the defogger switch in the integration control and panel is turned on, the air conditioning amplifier checks that the back door window is in the fully closed position, turns on the defogger relay, and then activates the rear window defogger.
HINT:
- The rear window defogger and rear wiper will not operate if the back door power window is not initialized.
- The back door window fully closed position signal is transmitted from the back door ECU to the main body ECU via LIN communication, and from the main body ECU to the air conditioning amplifier via CAN communication.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
PERFORM INITIALIZATION (BACK DOOR POWER WINDOW) |
(a) Initialize the back door power window regulator motor
(b) Check if rear window defogger function operate
OK:
Rear window defogger function operates.
|
|
2. |
CHECK LIN COMMUNICATION SYSTEM |
(a) Check for LIN communication system DTCs related to the power window control system
.
OK:
LIN communication system DTCs are not output.
|
|
3. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check for CAN communication system DTCs
.
OK:
CAN communication system DTCs are not output.
|
|
4. |
PERFORM ACTIVE TEST USING TECHSTREAM (DEFOGGER RELAY) |
(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 / Air Conditioner / Active Test / Defogger Relay (Rear)
(e) Check that the defogger operation.
Air Conditioner
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Defogger Relay (Rear) |
Rear window defogger relay operation |
OFF or ON |
- |
OK:
Defogger operates on and off.
|
|
5. |
CHECK AIR CONDITIONING SYSTEM (LIN COMMUNICATION) |
(a) Operate the front air conditioner control panel to change the set temperature and check that the temperature at the outlets changes.
OK:
The outlet temperature changes in accordance with the operation of the control panel.
|
|
6. |
REPLACE INTEGRATION CONTROL AND PANEL |
(a) Temporarily replace the integration control and panel with a new or normally functioning one
.
|
|
7. |
CHECK INTEGRATION CONTROL AND PANEL (OPERATION) |
(a) Check that the malfunction disappears.
OK:
Malfunction disappears.
|
|
8. |
CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - BACK DOOR GLASS (REAR DEFOGGER)) |
|
(a) Disconnect the V11 rear defogger connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
V11-1 - Body ground |
Engine running Rear defogger switch ON |
11 to 14 V |
(c) Reconnect the rear defogger connector.
|
|
9. |
CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - BODY GROUND) |
|
(a) Disconnect the V12 rear defogger connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B-1 - Body ground |
Always |
Below 1 Ω |
(c) Reconnect the rear defogger connector.
|
|
10. |
INSPECT FUSE (DEF) |
|
(a) Remove the DEF fuse from the engine room relay block. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DEF fuse |
Always |
Below 1 Ω |
(c) Reinstall the DEF fuse.
|
|
11. |
INSPECT DEFOGGER RELAY (DEFOG) |
|
(a) Remove the defogger relay from the engine room relay block. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 - 4 |
When battery voltage is not applied between terminals 1 and 2 |
Below 1 Ω |
|
3 - 5 |
10 kΩ or higher |
|
|
3 - 4 |
When battery voltage is applied to terminals 1 and 2 |
10 kΩ or higher |
|
3 - 5 |
Below 1 Ω |
(c) Reinstall the defogger relay.
|
|
12. |
CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - BATTERY) |
(a) Remove the defogger relay from the 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 terminal 1 - Body ground |
Ignition switch ON |
11 to 14 V |
|
Defogger relay terminal 5 - Body ground |
Always |
11 to 14 V |
(c) Reinstall the defogger relay.
|
|
13. |
CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - AIR CONDITIONING AMPLIFIER) |
(a) Remove the defogger relay from the engine room relay block.
(b) Disconnect the H24 air conditioning amplifier connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Defogger relay terminal 2 - H24-38 (RDEF) |
Always |
Below 1 Ω |
(d) Reconnect the air conditioning amplifier connector.
(e) Reinstall the defogger relay.
|
|
14. |
CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY, BODY GROUND) |
(a) Disconnect the V11 and V12 defogger connectors.
(b) Remove the defogger relay from the engine room relay block.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V11-1 - Defogger relay terminal 3 |
Always |
Below 1 Ω |
|
V12-1 - Body ground |
Always |
Below 1 Ω |
|
Defogger relay terminal 4 - Body ground |
Always |
Below 1 Ω |
|
V11-1 - Body ground |
Always |
10 kΩ or higher |
(d) Reinstall the defogger relay .
(e) Reconnect the defogger connectors.
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