- Clogging in the air tube or each valve
- Wire harness or connector
- Leveling solenoid valve (No. 2 height control valve)
- Gate solenoid valve (No. 2 height control valve)
- Exhaust solenoid valve (No. 1 height control compressor)
- Suspension control ECU
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Suspension | Section: Suspension Control System | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000003FA2001X |
| Title: SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/ AVS): DESCRIPTION (2008 Sequoia) | ||
|
DTC |
C1762 |
Continuous Electric Current to Exhaust Solenoid |
DESCRIPTION
|
DTC Code |
Detection Condition |
Trouble Area |
|---|---|---|
|
C1762 |
With the exhaust valve activated, the vehicle does not go down to the standard vehicle height after 105 seconds have elapsed. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (REAR GATE SOLENOID) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON, and turn the Techstream main switch on.
(c) Enter the following menus: Chassis / Air suspension / Active Test.
Air Suspension
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Rear Gate Solenoid |
Gate solenoid valve/ |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
OK:
Operation of solenoid (clicking sound) can be heard
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (REAR LEVELING SOLENOID) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON, and turn the Techstream main switch on.
(c) Enter the following menus: Chassis / Air suspension / Active Test.
Air Suspension
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Rear Leveling Solenoid |
Leveling solenoid valve |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
OK:
Operation of solenoid (clicking sound) can be heard
|
|
3. |
PERFORM ACTIVE TEST USING TECHSTREAM (EXHAUST SOLENOID) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON, and turn the Techstream main switch on.
(c) Enter the following menus: Chassis / Air suspension / Active Test.
Air Suspension
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Exhaust Solenoid |
Exhaust solenoid valve |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
OK:
Operation of solenoid (clicking sound) can be heard
|
|
4. |
INSPECT NO. 1 HEIGHT CONTROL COMPRESSOR (EXHAUST SOLENOID VALVE) |
(a) Turn the ignition switch off.
|
(b) Disconnect Q3 solenoid valve connector. |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (B) - 2 (L) |
20°C (68°F) |
10 to 14 Ω |
(d) Connect the battery positive (+) lead to terminal 1 and the negative (-) lead to terminal 2 of the solenoid valve connector. Then check that the valve makes an operating sound.
OK:
Operation of solenoid (clicking sound) can be heard
|
|
5. |
CHECK HARNESS AND CONNECTOR (EXHAUST SOLENOID VALVE - ECU AND BODY GROUND) |
|
(a) Disconnect the O16 ECU connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Q3-1 (B) - O16-8 (SLEX) |
Always |
Below 1 Ω |
|
Q3-1 (B) or O16-8 (SLEX) - Body ground |
Always |
10 kΩ or higher |
|
Q3-2 (L) - Body ground |
Always |
Below 1 Ω |
|
|
|