Suspension Control. Dtc C1711 Front Height Control Sensor Rh Circuit Malfunction

Suspension. Land Cruiser. Urj200, 202 Grj200 Vdj200

Suspension Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

INSPECT HEIGHT CONTROL SENSOR

DTC C1711 Front Height Control Sensor RH Circuit Malfunction

DTC C1712 Front Height Control Sensor LH Circuit Malfunction

DTC C1713 Rear Height Control Sensor RH Circuit Malfunction

DTC C1714 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 sensor resistance value changes, the sensor voltage value changes accordingly. The suspension control ECU then receives the voltage value from the sensor to detect the vehicle height change.

DTC Code	Detection Condition	Trouble Area
C1711	When one of the following conditions is met: With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the front height control sensor RH is detected for 1 second. When there is a height control sensor power supply voltage malfunction. When the height control sensor is determined to be stuck (When the sensor output is constant while the vehicle is turning, the sensor is determined to be stuck).	Harness or connector Front height control sensor RH Suspension control ECU
C1712	When one of the following conditions is met: With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the front height control sensor LH is detected for 1 second. When there is a height control sensor power supply voltage malfunction. When the height control sensor is determined to be stuck (When the sensor output is constant while the vehicle is turning, the sensor is determined to be stuck).	Harness or connector Front height control sensor LH Suspension control ECU
C1713	When one of the following conditions is met: With the engine switch on (IG), 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. When there is a height control sensor power supply voltage malfunction. When the height control sensor is determined to be stuck (When the sensor output is constant while the vehicle is turning, the sensor is determined to be stuck).	Harness or connector Rear height control sensor RH Suspension control ECU
C1714	When one of the following conditions is met: With the engine switch on (IG), 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. When there is a height control sensor power supply voltage malfunction. When the height control sensor is determined to be stuck (When the sensor output is constant while the vehicle is turning, the sensor is determined to be stuck).	Harness or connector Rear height control sensor LH Suspension control ECU

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System.
Dtc
C1711 Front Height Control Sensor Rh Circuit Malfunction

INSPECTION PROCEDURE

NOTICE:

Before performing troubleshooting, inspect the connectors of related circuits.
If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed (Click here).

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

NOTICE:

When inspecting the wire harnesses between the suspension control ECU and each sensor, it is difficult to determine the malfunctioning area if there is a sensor power supply malfunction. Therefore, disconnect each sensor connector (front RH, front LH, rear RH and rear LH) on the ECU side.

Check the front height control sensor RH side: (C1711)

Disconnect the K35 and K36 ECU connectors.
Disconnect the z34 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z34-1 (SHG) - K35-12 (SHG1)	Always	Below 1 Ω
z34-2 (SHFR) - K36-26 (SHFR)	Always	Below 1 Ω
z34-3 (SHB) - K35-15 (SHB1)	Always	Below 1 Ω
z34-1 (SHG) - Body ground	Always	10 kΩ or higher
z34-2 (SHFR) - Body ground	Always	10 kΩ or higher
z34-3 (SHB) - Body ground	Always	10 kΩ or higher

Check the front height control sensor LH side: (C1712)

Disconnect the K35 and K36 ECU connectors.
Disconnect the z35 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z35-1 (SHG) - K36-15 (SHG2)	Always	Below 1 Ω
z35-2 (SHFL) - K35-21 (SHFL)	Always	Below 1 Ω
z35-3 (SHB) - K36-14 (SHB2)	Always	Below 1 Ω
z35-1 (SHG) - Body ground	Always	10 kΩ or higher
z35-2 (SHFL) - Body ground	Always	10 kΩ or higher
z35-3 (SHB) - Body ground	Always	10 kΩ or higher

Check the rear height control sensor RH side: (C1713)

Disconnect the K35 and K36 ECU connectors.
Disconnect the N5 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N5-3 (SHG) - K36-20 (SHG3)	Always	Below 1 Ω
N5-2 (SHRR) - K36-24 (SHRR)	Always	Below 1 Ω
N5-1 (SHB) - K36-13 (SHB3)	Always	Below 1 Ω
N5-3 (SHG) - Body ground	Always	10 kΩ or higher
N5-2 (SHRR) - Body ground	Always	10 kΩ or higher
N5-1 (SHB) - Body ground	Always	10 kΩ or higher

Check the rear height control sensor LH side: (C1714)

Disconnect the K35 and K36 ECU connectors.
Disconnect the N7 sensor connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N7-3 (SHG) - K36-19 (SHG4)	Always	Below 1 Ω
N7-2 (SHRL) - K36-27 (SHRL)	Always	Below 1 Ω
N7-1 (SHB) - K36-25 (SHB4)	Always	Below 1 Ω
N7-3 (SHG) - Body ground	Always	10 kΩ or higher
N7-2 (SHRL) - Body ground	Always	10 kΩ or higher
N7-1 (SHB) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.INSPECT HEIGHT CONTROL SENSOR

Check the front height control sensor:
1. Remove the front height control sensor RH or front height control sensor LH (Click here).
  
  NOTICE:
  Do not drop the height control sensor. If it is dropped, replace it with a new one.
2. Connect 3 1.5 V dry cell batteries 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 (SHFR*1 or SHFL*2) and terminal 1 (SHG).
  NOTICE:
  Do not apply a voltage of higher than 6 V.
  HINT:
  *1: for RH
  *2: for LH
4. Measure the voltage according to the value(s) in the table below.
  
  Standard Voltage:
  for RH
  Tester Connection
  Condition
  Specified Condition
  2 (SHFR) - 1 (SHG)
  Max. HI
  Approx. 4.1 V
  Normal
  Approx. 2.25 V
  Min. LO
  Approx. 0.45 V
  for LH
  Tester Connection
  Condition
  Specified Condition
  2 (SHFL) - 1 (SHG)
  Max. HI
  Approx. 4.1 V
  Normal
  Approx. 2.25 V
  Min. LO
  Approx. 0.45 V

Check the rear height control sensor.
1. Remove the rear height control sensor RH or rear height control sensor LH (Click here).
  NOTICE:
  Do not drop the height control sensor. If it is dropped, replace it with a new one.
2. Connect 3 1.5 V dry cell batteries 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*1 or SHRL*2) and terminal 3 (SHG).
  NOTICE:
  Do not apply a voltage of higher than 6 V.
  HINT:
  *1: for RH
  *2: for LH
4. Measure the voltage according to the value(s) in the table below.
  
  Standard Voltage:
  for RH
  Tester Connection
  Condition
  Specified Condition
  2 (SHRR) - 3 (SHG)
  Max. HI
  Approx. 4.1 V
  Normal
  Approx. 2.25 V
  Min. LO
  Approx. 0.45 V
  for LH
  Tester Connection
  Condition
  Specified Condition
  2 (SHRL) - 3 (SHG)
  Max. HI
  Approx. 4.1 V
  Normal
  Approx. 2.25 V
  Min. LO
  Approx. 0.45 V

Result
Result	Proceed to
OK	A
Front height control sensor RH malfunction	B
Front height control sensor LH malfunction	C
Rear height control sensor RH malfunction	D
Rear height control sensor LH malfunction	E

REPLACE FRONT HEIGHT CONTROL SENSOR RH (Click here)

REPLACE FRONT HEIGHT CONTROL SENSOR LH (Click here)

REPLACE REAR HEIGHT CONTROL SENSOR RH (Click here)

REPLACE REAR HEIGHT CONTROL SENSOR LH (Click here)

REPLACE SUSPENSION CONTROL ECU (Click here)

for RH
Tester Connection	Condition	Specified Condition
2 (SHFR) - 1 (SHG)	Max. HI	Approx. 4.1 V
	Normal	Approx. 2.25 V
	Min. LO	Approx. 0.45 V

for LH
Tester Connection	Condition	Specified Condition
2 (SHFL) - 1 (SHG)	Max. HI	Approx. 4.1 V
	Normal	Approx. 2.25 V
	Min. LO	Approx. 0.45 V

for RH
Tester Connection	Condition	Specified Condition
2 (SHRR) - 3 (SHG)	Max. HI	Approx. 4.1 V
	Normal	Approx. 2.25 V
	Min. LO	Approx. 0.45 V

for LH
Tester Connection	Condition	Specified Condition
2 (SHRL) - 3 (SHG)	Max. HI	Approx. 4.1 V
	Normal	Approx. 2.25 V
	Min. LO	Approx. 0.45 V