C1799

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1799/99: Access Mode Switch Circuit

DTC C1799/99 - Access Mode Switch Circuit

DESCRIPTION

By selecting the access mode switch, the vehicle's height is set approx. 25 mm (0.98 in.) (approx. 30 mm (1.18 in.) for 4WD) lower than normal vehicle height.
While driving, vehicle height returns to the previously selected position.
HINT: If the vehicle height mode is set in "HI mode", the access mode can not be operated.





WIRING DIAGRAM





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

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position, and push the intelligent tester main switch on.
(c) Select the item below in the DATA LIST, and read its value displayed on the intelligent tester.
AIRSUS:





(d) Check that the value displayed on the intelligent tester changes by pressing the access mode switch.
OK:
Access mode switch value changes.
NG -- INSPECT ACCESS MODE SWITCH
OK -- REPLACE SUSPENSION CONTROL ECU
2. INSPECT ACCESS MODE SWITCH





(a) Disconnect the access mode switch connector.
(b) Measure the resistance according to the values in the table below.
Standard resistance:






NG -- REPLACE ACCESS MODE SWITCH
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - ACCESS MODE SWITCH)





(a) Disconnect the suspension control ECU S16 connector.
(b) Measure the resistance according to the values in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (ACCESS MODE SWITCH - BODY GROUND)





(a) Measure the resistance according to the values in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SUSPENSION CONTROL ECU