C1791

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1791/91: Adaptive Variable Suspension (AVS) Switch Circuit (Test Mode DTC)
C1791/91 - Adaptive Variable Suspension (AVS) Switch Circuit (Test Mode DTC)

DESCRIPTION

The absorber control switch is used to select the damping force mode of the shock absorber.





HINT
This DTC is stored only during test mode.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the suspension control ECU, perform registration Testing and Inspection.

PROCEDURE

1. READ VALUE USING TECHSTREAM (DAMPING CONTROL SWITCH)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Air suspension / Data List.

Air Suspension





(f) Check that the value displayed on the Techstream changes by operating the absorber control switch between COMF, NORMAL and SPORT.

OK:

Absorber control switch value changes.

NG -- INSPECT ABSORBER CONTROL SWITCH (COMBINATION SWITCH)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. INSPECT ABSORBER CONTROL SWITCH (COMBINATION SWITCH)

(a) Turn the engine switch off.

(b) Remove the combination switch Removal.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





Text in Illustration





NG -- REPLACE COMBINATION SWITCH ASSEMBLY Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (ABSORBER CONTROL SWITCH - SUSPENSION CONTROL ECU)

(a) Disconnect the i5 combination switch connector.

(b) Disconnect the A40 suspension control ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SUSPENSION CONTROL ECU Removal