Air Suspension System (w/o AVS)

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/o AVS): C1713,C1714: Rear Height Control Sensor RH Circuit Malfunction
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.





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 Removal.

(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:





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 Removal.

(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 (SHRL) and terminal 1 (SHG).

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

Standard Voltage:





NOTICE:
Do not apply a voltage of more than 6 V.

Result





C -- REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Removal

B -- REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH Removal
A -- Continue to next step.

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:





(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:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SUSPENSION CONTROL ECU Removal