1. Diagnosis
If the EMS/air suspension ECU detects a malfunction in this system, it blinks the damping mode or vehicle height indicator light to alert the driver of the malfunction. The ECU will also store the codes of the malfunctions.
Reading DTC The DTCs can be read by connecting the hand-held tester to the DLC3 to communicate with the ECU directly or causing a short between TC and CG terminals of the DLC3 and observing the blinking pattern.
Clearing DTC The DTCs can be cleared by connecting the hand-held tester to the DLC3 or causing a short between TC and CG terminals of the check connector and depressing the brake pedal 8 or more times within 5 seconds.
2. Fail-safe
If the ECU detects a malfunction in any of the sensors or actuator, the ECU prohibits the vehicle height control and/or the damping force control.
3. Input signal check (test mode)
The input signal check is to see whether signals from the steering sensor and stop light switch, etc. are being input normally to the ECU. By connecting the TS and CG of the DLC3 with the SST and carrying out the prescribed operation, you can read the input signal from the pattern with which the indicator light flashes. Alternatively, you can connect a hand-held tester and read the input signals on it. This depends on the model. For details, refer to Repair Manual.
4. Damping force controlling condition check
With the DLC3 TS and CG connected with the SST, you can check the change in the shock absorber damping force by operating the absorber control switch or pressing the brake pedal. This depends on the model. For details, refer to Repair Manual.