Suspension Control. Dtc C1713/13 Rear Height Control Sensor Rh Circuit Malfunction

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

DTC C1713/13 Rear Height Control Sensor RH Circuit Malfunction

DTC C1714/14 Rear Height Control Sensor LH Circuit Malfunction

DESCRIPTION

The height control sensor changes its resistance value based on changes in vehicle height. The suspension control ECU outputs a fixed voltage of 5 V to the SHB terminal of the height control sensor. If the resistance value of the sensor changes, the voltage value of the sensor changes accordingly. The suspension control ECU then inputs the voltage value from the sensor to detect the vehicle height change.

DTC Code	DTC Detection Condition	Trouble Area
C1713/13	Either condition is met: With the ignition switch ON, a voltage of 5.5 V or higher or 4.3 V or less at the power source of the rear height control sensor RH is detected for 0.5 seconds. With the ignition switch ON, a voltage of 4.7 V or higher or 0.3 V or less at the rear height control sensor RH is detected for 1 second.	Harness or connector Rear height control sensor RH Suspension control ECU
C1714/14	Either condition is met: With the ignition switch ON, a voltage of 5.5 V or higher or 4.3 V or less at the power source of the rear height control sensor LH is detected for 0.5 seconds. With the ignition switch ON, a voltage of 4.7 V or higher or 0.3 V or less at the rear height control sensor LH is detected for 1 second.	Harness or connector Rear height control sensor LH Suspension control ECU

WIRING DIAGRAM

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Suspension Control.Air Suspension System.
Dtc
C1713/13 Rear Height Control Sensor Rh Circuit Malfunction

INSPECTION PROCEDURE

NOTICE:

When replacing the suspension control ECU, perform registration (LandCruiser RM000003X4500TX.html).

1.INSPECT REAR HEIGHT CONTROL SENSOR

Text in Illustration
*A	for RH	*B	for LH
*1	Rear Height Control Sensor	-	-
*a	Component without harness connected (Rear Height Control Sensor)	*b	Min. Low
*c	Normal	*d	Max. High
	45°		45°

Check the rear height control sensor RH (when DTC C1713/13 is output).
1. Remove the rear height control sensor RH (LandCruiser RM000002BGU00QX.html).
2. Connect 3 dry cell batteries of 1.5 V in series.
3. Connect the positive (+) end of the batteries to terminal 1 (SHB) of the height control sensor and the negative (-) end of the batteries to terminal 3 (SHG). While slowly moving the sensor link up and down, measure the voltage between terminal 2 (SHRR) and terminal 3 (SHG).
4. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Condition
  Specified Condition
  3 (SHG) - 2 (SHRR)
  Max. High (45°)
  4.4 to 4.6 V
  Normal (0°)
  2.3 to 2.6 V
  Min. Low (-45°)
  0.4 to 0.6 V
  NOTICE:
  Do not apply a voltage of 5 V or higher.

Check the rear height control sensor LH (when DTC C1714/14 is output).
1. Remove the rear height control sensor LH (LandCruiser RM000002BGU00QX.html).
2. Connect 3 dry cell batteries of 1.5 V in series.
3. Connect the positive (+) end of the batteries to terminal 1 (SHB) of the height control sensor and the negative (-) end of the batteries to terminal 3 (SHG). While slowly moving the sensor link up and down, measure the voltage between terminal 2 (SHRL) and terminal 3 (SHG).
4. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Condition
  Specified Condition
  3 (SHG) - 2 (SHRL)
  Max. High (45°)
  4.4 to 4.6 V
  Normal (0°)
  2.3 to 2.6 V
  Min. Low (-45°)
  0.4 to 0.6 V
  NOTICE:
  Do not apply a voltage of 5 V or higher.

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

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY RH (LandCruiser RM000002BGU00QX.html)

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH (LandCruiser RM000002BGU00QX.html)

A

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

Check the rear height control sensor RH (when DTC C1713/13 is output).

Disconnect the S3 rear height control sensor RH connector.
Disconnect the R19 suspension control ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S3-3 (SHG) - R19-16 (SGR2)	Always	Below 1 Ω
S3-2 (SHRR) - R19-26 (SHRR)	Always	Below 1 Ω
S3-1 (SHB) - R19-13 (SBR2)	Always	Below 1 Ω
S3-3 (SHG) - Body ground	Always	10 kΩ or higher
S3-2 (SHRR) - Body ground	Always	10 kΩ or higher
S3-1 (SHB) - Body ground	Always	10 kΩ or higher

Check the rear height control sensor LH (when DTC C1714/14 is output).

Disconnect the S6 rear height control sensor LH connector.
Disconnect the R19 suspension control ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S6-3 (SHG) - R19-15 (SGL2)	Always	Below 1 Ω
S6-2 (SHRL) - R19-24 (SHRL)	Always	Below 1 Ω
S6-1 (SHB) - R19-14 (SBL2)	Always	Below 1 Ω
S6-3 (SHG) - Body ground	Always	10 kΩ or higher
S6-2 (SHRL) - Body ground	Always	10 kΩ or higher
S6-1 (SHB) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE SUSPENSION CONTROL ECU (LandCruiser RM000002BGR01UX.html)