| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Exterior | Section: Wiper/Washer | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM0000026QO004X |
| Title: WIPER / WASHER: WIPER AND WASHER SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Wiper and Washer Switch Circuit |
DESCRIPTION
- The manual operation signals are sent to the main body ECU.
- Perform this inspection with the back door window glass fully closed.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK VEHICLE CONDITION |
(a) Check whether the rear wiper and washer systems operate normally.
Result
|
Result |
Proceed to |
|---|---|
|
Rear wiper and washer systems do not operate. |
A |
|
Rear wiper system does not operate. |
B |
|
Rear washer system does not operate. |
C |
|
|
2. |
INSPECT FUSE (ECU-IG No. 2) |
|
(a) Remove the ECU-IG No. 2 fuse from the main body ECU. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
ECU-IG No. 2 fuse |
Always |
Below 1 Ω |
(c) Reinstall the ECU-IG No. 2 fuse.
|
|
3. |
INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY |
(a) Remove the windshield wiper switch assembly.
(b) Inspect the rear wiper switch.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (EW) - 6 (C1R) |
Rear wiper switch OFF |
10 kΩ or higher |
|
2 (EW) - 7 (+1R) |
||
|
6 (C1R) -7 (+1R) |
||
|
2 (EW) - 6 (C1R) |
Rear wiper switch LO |
Below 1 Ω |
|
2 (EW) - 7 (+1R) |
Rear wiper switch HI |
Below 1 Ω |
(d) Inspect the rear washer switch.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (EW) - 7 (+1R) |
Rear washer switch OFF |
10 kΩ or higher |
|
2 (EW) - 5 (WR) |
||
|
5 (WR) - 7 (+1R) |
||
|
2 (EW) - 5 (WR) |
Rear washer switch ON (Rear wiper switch in OFF position) |
Below 1 Ω |
|
2 (EW) - 7 (+1R) |
Rear washer switch ON (Rear wiper switch in ON position) |
Below 1 Ω |
|
2 (EW) - 5 (WR) |
||
|
5 (WR) - 7 (+1R) |
(f) Reinstall the the windshield wiper switch assembly.
|
|
4. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BODY GROUND) |
|
(a) Disconnect the H14 windshield wiper switch assembly connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H14-2 (EW) - Body ground |
Always |
Below 1 Ω |
(c) Reconnect the windshield wiper switch assembly connector.
|
|
5. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU) |
|
(a) Disconnect the H3 and H4 main body ECU connector. |
(b) Inspect the rear wiper switch.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
H3-2 (RWIN) - Body ground |
Rear wiper switch OFF |
10 kΩ or higher |
|
H3-9 (RWON) - Body ground |
||
|
H3-2 (RWIN) - Body ground |
Rear wiper switch LO |
Below 1 Ω |
|
H3-9 (RWON) - Body ground |
Rear wiper switch HI |
Below 1 Ω |
|
H4-7 (RWSW) - Body ground |
Rear washer switch ON (Rear wiper switch in ON position) |
Below 1 Ω |
(d) Inspect the rear washer switch.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
H4-7 (RWSW) - Body ground |
Rear washer switch OFF |
10 kΩ or higher |
|
H4-7 (RWSW) - Body ground |
Rear washer switch ON (Rear wiper switch in ON position) |
Below 1 Ω |
|
Rear washer switch ON (Rear wiper switch in OFF position) |
Below 1 Ω |
(f) Reconnect the main body ECU connector.
|
|
6. |
CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU) |
|
(a) Disconnect the DA main body ECU connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DA-1 - Body ground |
Always |
11 to 14 V |
(c) Reconnect the main body ECU connector.
|
|
7. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION SWITCH, BODY GROUND) |
|
(a) Disconnect the DD main body ECU connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
DD-43 - Body ground |
Ignition switch off |
Below 1 V |
|
Ignition switch ON |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
DD-62 - Body ground |
Always |
Below 1 Ω |
(d) Reconnect the main body ECU connector.
|
|
8. |
INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY |
(a) Remove the windshield wiper switch assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (EW) - 6 (C1R) |
Rear wiper switch OFF |
10 kΩ or higher |
|
2 (EW) - 7 (+1R) |
||
|
6 (C1R) - 7 (+1R) |
||
|
2 (EW) - 6 (C1R) |
Rear wiper switch LO |
Below 1 Ω |
|
2 (EW) - 7 (+1R) |
Rear wiper switch HI |
Below 1 Ω |
(c) Reinstall the windshield wiper switch assembly.
|
|
9. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU, BODY GROUND) |
(a) Disconnect the H3 main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
H3-2 (RWIN) - Body ground |
Rear wiper switch OFF |
10 kΩ or higher |
|
H3-9 (RWON) - Body ground |
||
|
H3-2 (RWIN) - Body ground |
Rear wiper switch LO |
Below 1 Ω |
|
H3-9 (RWON) - Body ground |
Rear wiper switch HI |
Below 1 Ω |
(c) Reconnect the main body ECU connector.
|
|
10. |
INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY |
(a) Remove the windshield wiper switch assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (EW) - 7 (+1R) |
Rear washer switch OFF |
10 kΩ or higher |
|
2 (EW) - 5 (WR) |
||
|
5 (WR) - 7 (+1R) |
||
|
2 (EW) - 7 (+1R) |
Rear washer switch ON (Rear wiper switch in ON position) |
Below 1 Ω |
|
2 (EW) - 5 (WR) |
||
|
5 (WR) - 7 (+1R) |
(c) Reinstall the windshield wiper switch assembly.
|
|
11. |
CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU, BODY GROUND) |
(a) Disconnect the H4 main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
H4-7 (RWSW) - Body ground |
Rear washer switch OFF |
10 kΩ or higher |
|
H4-7 (RWSW) - Body ground |
Rear washer switch ON (Rear wiper switch in ON position) |
Below 1 Ω |
|
Rear washer switch ON (Rear wiper switch in OFF position) |
Below 1 Ω |
(c) Reconnect the main body ECU connector.
|
|
|