SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/o 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: RM000001N94003X
Title: SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/o AVS): DESCRIPTION (2008 Sequoia)

DTC

C1713

Rear Height Control Sensor RH Circuit Malfunction

DTC

C1714

Rear Height Control Sensor LH Circuit Malfunction

DESCRIPTION

A magnetic circuit installed on the shaft inside the height control sensor rotates around the linear IC. The linear IC outputs voltage corresponding to the level of magnetic strength generated by the magnetic circuit. As a result, voltage corresponding to the shaft rotation angle is supplied to the suspension control ECU.

DTC Code	Detection Condition	Trouble Area
C1713	With the ignition switch ON, a voltage of 4.7 V or more, or 0.3 V or less at rear height control sensor RH is detected for 1 second.	Wire harness or connector Rear height control sensor sub-assembly RH Suspension control ECU
C1714	With the ignition switch ON, a voltage of 4.7 V or more, or 0.3 V or less at rear height control sensor LH is detected for 1 second.	Wire harness or connector Rear height control sensor sub-assembly LH Suspension control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.	INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY

(a) Check the rear height control sensor RH: (C1713).

(1) Remove the rear height control sensor RH .

(2) Connect 3 dry cell batteries of 1.5 V in series.

(3) Connect the positive (+) end of the batteries to terminal 3 (SHB) of the height control sensor and the negative (-) end of the batteries to terminal 1 (SHG). While slowly moving the sensor link up and down, measure the voltage between terminal 2 (SHRR) and terminal 1 (SHG).

(4) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Sensor Condition	Specified Condition
1 (SHG) - 2 (SHRR)	High (45°)	4.4 to 4.6 V
	Normal (0°)	2.3 to 2.6 V
	Low (-45°)	0.4 to 0.6 V

NOTICE:

Do not apply a voltage of more than 6 V.

(b) Check the rear height control sensor LH: (C1714).

(1) Remove the rear height control sensor LH .

(2) Connect 3 dry cell batteries of 1.5 V in series.

(4) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Sensor Condition	Specified Condition
1 (SHG) - 2 (SHRL)	High (45°)	4.4 to 4.6 V
	Normal (0°)	2.3 to 2.6 V
	Low (-45°)	0.4 to 0.6 V

NOTICE:

Do not apply a voltage of more than 6 V.

Result

Result	Proceed to
OK	A
NG (Rear height control sensor RH)	B
NG (Rear height control sensor LH)	C

2.	CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR - SUSPENSION CONTROL ECU)

(a) Check the rear height control sensor RH: (C1713).

(1) Disconnect the O19 ECU connector and z2 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z2-1 (SHG) - O19-18 (SGR2)	Always	Below 1 Ω
z2-2 (SHRR) - O19-16 (SHRR)	Always	Below 1 Ω
z2-3 (SHB) - O19-14 (SBR2)	Always	Below 1 Ω
z2-1 (SHG) or O19-18 (SGR2) - Body ground	Always	10 kΩ or higher
z2-2 (SHRR) or O19-16 (SHRR) - Body ground	Always	10 kΩ or higher
z2-3 (SHB) or O19-14 (SBR2) - Body ground	Always	10 kΩ or higher

(b) Check the rear height control sensor LH: (C1714).

(1) Disconnect the O19 ECU connector and z1 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z1-1 (SHG) - O19-19 (SGL2)	Always	Below 1 Ω
z1-2 (SHRL) - O19-17 (SHRL)	Always	Below 1 Ω
z1-3 (SHB) - O19-15 (SBL2)	Always	Below 1 Ω
z1-1 (SHG) or O19-19 (SGL2) - Body ground	Always	10 kΩ or higher
z1-2 (SHRL) or O19-17 (SHRL) - Body ground	Always	10 kΩ or higher
z1-3 (SHB) or O19-15 (SBL2) - Body ground	Always	10 kΩ or higher