C1788

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1788/88: Height Control OFF Switch Circuit

DTC C1788/88 - Height Control OFF Switch Circuit

DESCRIPTION

Height control can be operated or suspended by pressing the height control OFF switch.
By pressing the switch once, height control can be suspended.
By pressing the switch one more time, height control can be operated.






WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Start the inspection from step 1 when using the Techstream and start from step 2 when not using the Techstream.

PROCEDURE

1. READ VALUE USING DATA LIST (HEIGHT SW HOLD)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and the Techstream on.
(c) Select the item "Height Control Hold Switch" in the Data List, and read its value displayed on the Techstream.
(d) Check that the value displayed on the Techstream changes by pressing the height control mode select switch.
OK:
Height control mode select switch value changes.
OK -- REPLACE SUSPENSION CONTROL ECU
NG -- Continue to next step.
2. INSPECT HEIGHT CONTROL OFF SWITCH




(a) Disconnect the height control OFF switch connector.
(b) Check continuity between terminals 4 and 9 of the height control mode select switch when the height control OFF switch is pushed in and free.
Standard resistance:






NG -- REPLACE HEIGHT CONTROL OFF SWITCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL OFF SWITCH - SUSPENSION CONTROL ECU)
(a) Check for open and short circuit in the harness and the connector between the height control OFF switch and the suspension control ECU Electronic Circuit Inspection Procedure.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SUSPENSION CONTROL ECU