DTC C1761: Continuous Electric Current to Height Control Compressor Motor [08/2019 - ]: Procedure

1. Check for air leakage (Refer to PROCEDURE - Step 5 ).

   OK

   No leaks.

Result: 

NG 

REPAIR OR REPLACE AIR TUBE 

Result: 

OK 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG), and turn the Techstream main switch on.
3. Enter the following menus: Chassis / Air suspension / Active Test.
   AIR SUSPENSION
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Exhaust Solenoid	Exhaust solenoid valve	ON or OFF	Operation sound of solenoid (clicking sound) can be heard

   OK

   Operation of solenoid (clicking sound) can be heard

Result: 

NG 

REPLACE NO. 1 HEIGHT CONTROL COMPRESSOR 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG), and turn the Techstream main switch on.
3. Enter the following menus: Chassis / Air suspension / Active Test.
   AIR SUSPENSION
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Rear Gate Solenoid	Gate solenoid valve/	ON or OFF	Operation sound of solenoid (clicking sound) can be heard

   OK

   Operation of solenoid (clicking sound) can be heard

Result: 

NG 

REPLACE NO. 2 HEIGHT CONTROL VALVE SUB-ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG), and turn the Techstream main switch on.
3. Enter the following menus: Chassis / Air suspension / Active Test.
   AIR SUSPENSION
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Rear Leveling Solenoid	Leveling solenoid valve	ON or OFF	Operation sound of solenoid (clicking sound) can be heard

   OK

   Operation of solenoid (clicking sound) can be heard

Result: 

NG 

REPLACE NO. 2 HEIGHT CONTROL VALVE SUB-ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  5

1. Turn the engine switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Remove the AIR SUS relay from the engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	When 12 V battery voltage is not applied to terminal 1 and 2	10 kΩ or higher
   	When 12 V battery voltage is applied to terminal 1 and 2	Below 1 Ω

Result: 

NG 

REPLACE SUSPENSION CONTROL RELAY 

Result: 

OK 

See step  6

1. Remove the AIR SUS relay from the engine room relay block.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Relay block AIR SUS relay terminal 5 - Body ground	Always	11 to 14 V

3. Disconnect the Q7 compressor connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Relay block AIR SUS relay terminal 3 - Q7-1 (B)	Always	Below 1 Ω
   Relay block AIR SUS relay terminal 3 or Q7-1 (B) - Body ground	Always	10 kΩ or higher
   Q7-2 (E) - Body ground	Always	Below 1 Ω

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Check the vehicle height (Refer to ADJUSTMENT [08/2015 - ] ).

Result: 

NG 

ADJUST VEHICLE HEIGHT 

(Refer to ADJUSTMENT [08/2015 - ] )

Result: 

OK 

See step  8

1. Clear the DTC (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
2. Check for DTC (Refer to DTC CHECK / CLEAR [08/2019 - ] ).
   RESULT
   
   

   Result	Proceed to
   DTC is output	A
   DTC is not output	B

Result: 

A 

REPLACE SUSPENSION CONTROL ECU 

(Refer to REMOVAL [08/2015 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )