DTC C1762: Continuous Electric Current to Exhaust Solenoid (TO 08/2009): Procedure

1. Ask the customer about the vehicle and usage conditions when the DTC was stored.

   HINT: 

   DTC C1762 can be stored under unusual vehicle or usage conditions.

   Points to confirm

   Confirm if there were any foreign objects caught between the body and tires. Confirm if the vehicle has been driven on an unpaved surface or with a wheel not contacting the ground. Confirm if the vehicle height mode has been continuously changed using the height control switch, causing the vehicle to raise and lower repeatedly.

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Start the engine and wait for 3 minutes or more.
3. Select luggage mode.
4. Select HI mode.
5. Check the DTC. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC C1762 is output	A
   DTC C1762 is not output	B
   DTC C1762 and other DTCs are output	C

C → See step   9 

B → END (C1762 WAS OUTPUT DUE TO UNUSUAL VEHICLE OR USAGE CONDITION) 

A: Go to next step 

1. Inspect the air tubes for clogs. Refer to PRECAUTION .

   OK

   No clogs are found in the air tubes.

NG → REPAIR OR REPLACE AIR TUBE 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the height control valve No. 1 connector.
   Fig 1: Identifying Height Control Valve No. 1 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the values in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   3 (RH+) - 2 (E)	15 to 25°C (59 to 77°F)	10 to 14 Ω
   1 (LH+) - 2 (E)	15 to 25°C (59 to 77°F)	10 to 14 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Height Control Valve No. 1)

4. Check the front RH valve.
   1. Connect a positive (+) lead from the battery to terminal 3 (RH+) and a negative (-) lead to terminal 2 (E).
   2. Check the operating sound of the height control valve No. 1.

      OK

      It makes an operating sound (click).

5. Check the front LH valve.
   1. Connect a positive (+) lead from the battery to terminal 1 (LH+) and a negative (-) lead to terminal 2 (E).
   2. Check the operating sound of the height control valve No. 1.

      OK

      It makes an operating sound (click).

NG → See step   10 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the rear height control valve No. 2 connector.
   Fig 2: Identifying Rear Height Control Valve No. 2 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the values in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   1 (RH+) - 2 (E)	15 to 25°C (59 to 77°F)	10 to 14 Ω
   3 (LH+) - 2 (E)	15 to 25°C (59 to 77°F)	10 to 14 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Height Control Valve No. 2)

4. Check the rear RH valve.
   1. Connect a positive (+) lead from the battery to terminal 3 (RH+) and a negative (-) lead to terminal 2 (E).
   2. Check the operating sound of the height control valve No. 2.

      OK

      It makes an operating sound (click).

5. Check the rear LH valve.
   1. Connect a positive (+) lead from the battery to terminal 1 (LH+) and a negative (-) lead to terminal 2 (E).
   2. Check the operating sound of the height control valve No. 2.

      OK

      It makes an operating sound (click).

NG → See step   11 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the exhaust valve connector.
   Fig 3: Inspecting Height Control Compressor Assembly (Exhaust Valve)

   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
   2 (B) - 1 (L)	15 to 25°C (59 to 77°F)	10 to 14 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Exhaust Valve)

4. Inspect if the exhaust valve is stuck:
   1. Connect a positive (+) lead from the battery to terminal 2 (B) and a negative (-) lead to terminal 1 (L).
   2. Check the operating sound of the exhaust valve.

      OK

      It makes an operating sound (click).

NG → See step   12 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the low pressure tank valve connector.
   Fig 4: Inspecting Pneumatic W/Tube Tank Assembly (Low Pressure Tank Valve)

   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
   2 (B) - 1 (L)	15 to 25°C (59 to 77°F)	10 to 14 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Low Pressure Tank Valve)

4. Inspect if the low pressure tank valve is stuck :
   1. Connect a positive (+) lead from the battery to terminal 2 (B) and a negative (-) lead to terminal 1 (L).
   2. Check the operating sound of the low pressure tank valve.

      OK

      It makes an operating sound (click).

NG → See step   13 

OK → See step   8