Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUSPENSION CONTROL
CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR - SUSPENSION CONTROL ECU)
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
INSPECTION PROCEDURE
- NOTICE:
| 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
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| OK | |
| 2.INSPECT HEIGHT CONTROL SENSOR |
Check the front height control sensor:
Remove the front height control sensor RH or front height control sensor LH ().
- NOTICE:
- Do not drop the height control sensor. If it is dropped, replace it with a new one.
Connect 3 1.5 V dry cell batteries in series.
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
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.
Remove the rear height control sensor RH or rear height control sensor LH ().
- NOTICE:
- Do not drop the height control sensor. If it is dropped, replace it with a new one.
Connect 3 1.5 V dry cell batteries in series.
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
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 | 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 |
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| A | ||
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