DTC C1761: Continuous Electric Current to Height Control Compressor Motor: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Check for air leakage. Refer to OPERATION CHECK .

   OK

   No leaks.

NG → REPAIR OR REPLACE AIR TUBE 

OK: Go to next step 

1. Remove the front height control valve. Refer to REMOVAL .
2. Check the front height control valve RH valve.
   Fig 1: Identifying Front Height Control Valve RH Valve Connector Terminals

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   1. Connect terminal 1 (RH+) to the battery positive (+) terminal, and terminal 2 (E) to the battery negative (-) terminal.
   2. Check the operating sound of the height control valve.

      OK

      It makes an operating sound (click).

3. Check the front height control valve LH valve.
   Fig 2: Identifying Front Height Control Valve LH Valve Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Connect terminal 3 (LH+) to the battery positive (+) terminal, and terminal 2 (E) to the battery negative (-) terminal.
   2. Check the operating sound of the height control valve.

      OK

      It makes an operating sound (click).

NG → See step   9 

OK: Go to next step 

1. Remove the rear height control valve. Refer to REMOVAL .
2. Check the rear height control valve RH valve.
   Fig 3: Identifying Rear Height Control Valve RH Valve

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   1. Connect terminal 1 (+RH) to the battery positive (+) terminal, and terminal 2 (E) to the battery negative (-) terminal.
   2. Check the operating sound of the height control valve.

      OK

      It makes an operating sound (click).

3. Check the rear height control valve LH valve.
   Fig 4: Identifying Rear Height Control Valve LH Valve Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Connect terminal 3 (+LH) to the battery positive (+) terminal, and terminal 2 (E) to the battery negative (-) terminal.
   2. Check the operating sound of the height control valve.

      OK

      It makes an operating sound (click).

NG → See step   10 

OK: Go to next step 

1. Remove the height control compressor. Refer to REMOVAL .
2. Inspect if exhaust valve is stuck:
   Fig 5: Inspecting Exhaust Valve

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   1. Connect terminal 1 to the battery positive (+) terminal, and terminal 2 to the battery negative (-) terminal.
   2. Check the operating sound of the height control valve.

      OK

      It makes an operating sound (click).

3. Inspect if compressor is stuck:
   Fig 6: Identifying Height Control Compressor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Connect terminal 1 (B) to the battery positive (+) terminal, and terminal 2 (E) to the battery negative (-) terminal.
   2. Check that the motor rotates.
      WARNING:

      If the compressor is shorted, locked, or has a similar type of malfunction, a large amount of voltage will be flowing. Therefore, if the motor does not operate, immediately stop this inspection.

      NOTE:

      Do not allow the motor to operate for approximately 60 seconds or more.

      OK

      Motor operates

NG → See step   7 

OK: Go to next step 

1. Turn the engine switch off.
2. Remove the suspension control relay from the engine room No. 1 relay block.
   Fig 7: Identifying Suspension Control Relay Circuit Diagram

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	When battery voltage is not applied to terminal 1 and 2	10 kΩ or higher
   	When battery voltage is applied to terminal 1 and 2	Below 1 Ω

NG → REPLACE SUSPENSION CONTROL RELAY 

OK → See step   8