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: Procedure

1. Check the front height control sensor:
   1. Remove the front height control sensor RH or front height control sensor LH. Refer to REMOVAL .
      NOTE:

      Do not drop the height control sensor. If it is dropped, replace it with a new one.

      Fig 1: Identifying Front Height Control Sensor RH And LH

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Connect 3 1.5 V dry cell batteries in series.
   3. Connect the positive (+) end of the battery to terminal 3 (SHB) of the height control sensor and the negative (-) end of the battery to terminal 1 (SHG). While applying 4.5 V, slowly moving the sensor's link up and down, and measure the voltage between terminal 2 (SHFR*1 or SHFL*2) and terminal 1 (SHG).

      HINT: 

      *1: for RH

      *2: for LH

      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

      NOTE:

      Do not apply a voltage of more than 6 V.

2. Check the rear height control sensor:
   1. Remove the rear height control sensor RH or rear height control sensor LH. Refer to REMOVAL .
      NOTE:

      Do not drop the height control sensor. If it is dropped, replace it with a new one.

      Fig 2: Identifying Front Height Control Sensor RH And LH

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Connect 3 1.5 V dry cell batteries in series.
   3. Connect the positive (+) end of the battery to terminal 3 (SHB) of the height control sensor and the negative (-) end of the battery to terminal 1 (SHG). While applying 4.5 V, slowly moving the sensor's link up and down, and measure the voltage between terminal 2 (SHRR*1 or SHRL*2) and terminal 1 (SHG).

      HINT: 

      *1: for RH

      *2: for LH

      Standard Voltage

      FOR RH
      
      

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

      NOTE:

      Do not apply a voltage of more than 6 V.

   RESULT
   
   

   Condition	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

E → See step   7 

D → See step   6 

C → See step   5 

B → See step   4 

A: Go to next step 

1. Check the front height control sensor RH side: (C1711)
   1. Turn the engine switch off.
   2. Disconnect the A39 and L88 ECU connectors.
   3. Disconnect the A54 sensor connector.
   4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      A54-1 (SHG) - L88-21 (SGR1)	Always	Below 1 Ω
      A54-2 (SHFR) - A39-20 (SHFR)	Always	Below 1 Ω
      A54-3 (SHB) - L88-20 (SBR1)	Always	Below 1 Ω
      A54-1 (SHG) or L88-21 (SGR1) - Body ground	Always	10 kΩ or higher
      A54-2 (SHFR) or A39-20 (SHFR) - Body ground	Always	10 kΩ or higher
      A54-3 (SHB) or L88-20 (SBR1) - Body ground	Always	10 kΩ or higher

2. Check the front height control sensor LH side: (C1712)
   1. Turn the engine switch off.
   2. Disconnect the A39 and L88 ECU connectors.
   3. Disconnect the A4 sensor connector.
   4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      A4-1 (SHG) - L88-22 (SGL1)	Always	Below 1 Ω
      A4-2 (SHFL) - A39-22 (SHFL)	Always	Below 1 Ω
      A4-3 (SHB) - L88-18 (SBL1)	Always	Below 1 Ω
      A4-1 (SHG) or L88-22 (SGL1) - Body ground	Always	10 kΩ or higher
      A4-2 (SHFL) or A39-22 (SHFL) - Body ground	Always	10 kΩ or higher
      A4-3 (SHB) or L88-18 (SBL1) - Body ground	Always	10 kΩ or higher

3. Check the rear height control sensor RH side: (C1713)
   1. Turn the engine switch off.
   2. Disconnect the R1 ECU connector.
   3. Disconnect the "A" sensor connector.
   4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      "A"-1 (SHG) - R1-25 (SGR2)	Always	Below 1 Ω
      "A"-2 (SHRR) - R1-28 (SHRR)	Always	Below 1 Ω
      "A"-3 (SHB) - R1-26 (SBR2)	Always	Below 1 Ω
      "A"-1 (SHG) or R1-25 (SGR2) - Body ground	Always	10 kΩ or higher
      "A"-2 (SHRR) or R1-28 (SHRR) - Body ground	Always	10 kΩ or higher
      "A"-3 (SHB) or R1-26 (SBR2) - Body ground	Always	10 kΩ or higher

4. Check the rear height control sensor LH side: (C1714)
   1. Turn the engine switch off.
   2. Disconnect the R1 ECU connector.
   3. Disconnect the "B" sensor connector.
   4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      "B"-1 (SHG) - R1-23 (SGL2)	Always	Below 1 Ω
      "B"-2 (SHRL) - R1-30 (SHRL)	Always	Below 1 Ω
      "B"-3 (SHB) - R1-24 (SBL2)	Always	Below 1 Ω
      "B"-1 (SHG) or R1-23 (SGL2) - Body ground	Always	10 kΩ or higher
      "B"-2 (SHRL) or R1-30 (SHRL) - Body ground	Always	10 kΩ or higher
      "B"-3 (SHB) or R1-24 (SBL2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3