SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/ AVS): DESCRIPTION (2008 Sequoia)

Last Modified: 11-29-2007		1.6 C
Service Category: Suspension	Section: Suspension Control System
Model Year: 2008	Model: Sequoia	Doc ID: RM000001N9A00AX
Title: SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/ AVS): DESCRIPTION (2008 Sequoia)

DTC

C1792

Height Control Switch Circuit (Test Mode DTC)

DESCRIPTION

Vehicle height can be chosen by pressing the height control switch.

By pressing the "UP" side, vehicle height goes up.

By pressing the "DOWN" side, vehicle height goes down.

DTC Code	Detection Condition	Trouble Area
C1792	Height control switch signal does not change.	Height control switch Wire harness or connector Suspension control ECU

HINT:

This DTC is output only when the sensor signal check is done.

1.	READ VALUE USING TECHSTREAM (HEIGHT CONTROL SWITCH)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Enter the following menus: Chassis / Air suspension / Data List.

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Height Control Switch(Up)

Height control switch (Up) / ON or OFF

ON: Height control switch "UP" button pressed

OFF: -

Height Control Switch(Down)

Height control switch (Down) / ON or OFF

ON: Height control switch "DOWN" button pressed

OFF: -

(e) Check that the value displayed on the Techstream changes by pressing the height control switch "UP" or "DOWN".

OK:

Height control switch value changes.

Result	Proceed to
NG	A
OK (When troubleshooting according to the Problem Symptoms Table)	B
OK (When troubleshooting according to the DTC Chart)	C

2.	INSPECT HEIGHT CONTROL SWITCH

(a) Turn the ignition switch off.

(b) Remove the height control switch.

Standard Resistance:

3.	CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SWITCH - ECU AND BODY GROUND)

(a) Disconnect the O17 ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance: