Systems/How To Proceed With Troubleshooting; 2) DTC inspection See: Steering and Suspension/Suspension/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes; and 3) Techstream inspection (Data List or Active Test) See:
Steering and Suspension/Suspension/Testing and Inspection/Scan Tool Testing and Procedures. If no malfunctions are found
in other areas, replace the suspension control ECU.
- 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)
HINT
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. READ VALUE USING TECHSTREAM (IG AND +B POWER SOURCE VOLTAGE)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG) and the Techstream on.
(d) Enter the following menus: Chassis / Air suspension / Data List.
(e) According to the display on the Techstream.
Air suspension system
OK:
11 to 14 V
Result:
B -- CHECK DTC
A -- Continue to next step.
2. CHECK BATTERY
(a) Measure the battery voltage.
Standard voltage:
NG -- GO TO CHARGING SYSTEM See: Starting and Charging/Charging System/Testing and Inspection/Component Tests and
General Diagnostics
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF ECU)
(a) Disconnect the A56 ECU connector.
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