INSPECTION PROCEDURE
NOTICE:
- Before performing troubleshooting, inspect the connectors of related circuits.
- If DTC C1782 (Power Source Voltage Malfunction) is output at the same time, perform troubleshooting for C1782 first See:
C1782.
- Before replacing the suspension control ECU, perform all of the following again: 1) symptom simulation See: Accessories
and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled
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)
PROCEDURE
1. INSPECT PNEUMATIC W/TUBE TANK ASSEMBLY (LOW PRESSURE TANK VALVE)
(a) Turn the engine switch off.
(b) Disconnect the low pressure tank valve connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
(d) 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 -- REPLACE PNEUMATIC W/TUBE TANK ASSEMBLY
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - TANK SOLENOID VALVE)
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