Initial Inspection and Diagnostic Overview

TEST EQUIPMENT
This control module is diagnosed using Rotunda Super Star II Tester 007-0041B or equivalent. The test connector used to communicate with the EVO control module is located on the RH side of the luggage compartment.


INSPECTION AND VERIFICATION
1. Verify the customer's concern by operating the computer controlled suspension system to duplicate concern.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

Mechanical
^ Shock absorber failure
^ Leak from air liners)
^ Leak from air spring(s)
^ Ruptured air spring(s)
^ Height sensor damaged
^ Height sensor off ball studs

Electrical
^ Open fuses:
^ Power distribution box
AIR SUSPN PUMP (30A MAXI).
^ Junction Panel Fuse
Fuse 5 (15A).
^ Loose connectors.
^ Corroded connectors.
^ Air suspension service switch OFF.

3. If the inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
4. When the tester is connected, the engine is started and the HOLD/TEST button is latched down, the EVO controller will respond by sending a code 10 to the Star Tester which represents "Diagnostics mode entered." If diagnostic trouble code (DTC) 10 is not displayed, go to Pinpoint Test R.
5. Review diagnostic instructions.
5. If codes are retrieved go to DTC code index.
5. If the concern(s) remain after the inspection, determine the symptom(s) and go to diagnosis by symptom. Symptom Related Diagnostic Procedures