It makes an operating sound (click).
NG -- REPLACE PNEUMATIC W/TUBE TANK ASSEMBLY
OK -- REPLACE SUSPENSION CONTROL ECU
Up to 08/2009
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1781: Suspension Control ECU Malfunction
C1781 - Suspension Control ECU Malfunction
DESCRIPTION
If a malfunction in the suspension control ECU is detected, DTC C1781 is output.
INSPECTION PROCEDURE
NOTICE:
- If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first See:
C1782.
- If the suspension control ECU is replaced, the vehicle height offset calibration and registration of vehicle identification
information must be performed See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic
)/Testing and Inspection/Calibration and See: Steering and Suspension/Suspension/Suspension Control ( Automatic -
Electronic )/Testing and Inspection/Registration)
PROCEDURE
1. CHECK CAN COMMUNICATION SYSTEM
(a) Check the CAN communication system for any malfunctions See: Powertrain Management/Computers and Control
Systems/Information Bus/Testing and Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/Diagnosis
System.
Result:
B -- GO TO CAN COMMUNICATION SYSTEM See: Powertrain Management/Computers and Control Systems/Information
Bus/Testing and Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/How to Proceed With
Troubleshooting
A -- REPLACE SUSPENSION CONTROL ECU
From 08/2009
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1781: Suspension Control ECU Malfunction
C1781 - Suspension Control ECU Malfunction
DESCRIPTION
If a malfunction in the suspension control ECU is detected, DTC C1781 is output.
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