Toyota Sequoia (2005). Manual - part 228

DIDCP–01

–

DIAGNOSTICS

AIR SUSPENSION SYSTEM

DI–707

901

HOW TO PROCEED WITH TROUBLESHOOTING

1

Vehicle Brought to Workshop

NEXT

2

Customer Problem Analysis (See page 

DI–710

)

NEXT

3

Check CAN Communication System (See page 

DI–1065

)

Check if any DTCs are output.
HINT:
The suspension control ECU of this system is connected to the CAN communication system. Therefore, be-
fore starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

CAN System DTC is Output (Proceed To ”CAN
COMMUNICATION SYSTEM” (See page 

DI–1065

))

No CAN System DTC is Output (Go to step 4)

4

Check and Clear DTCs (See page 

DI–723

)

NEXT

5

Problem Symptom Confirmation

Symptom Does Not Occur (Go to step 6)

Symptom Occurs (Go to step 7)

DI–708

–

DIAGNOSTICS

AIR SUSPENSION SYSTEM

902

6

Symptom Simulation (See page 

IN–35

)

NEXT

7

DTC Check (See page 

DI–723

), Test Mode (See page 

DI–711

)

Normal System Code (Go to step 8)

Trouble Code (Go to step 9)

8

Problem Symptoms Table (See page 

DI–716

)

NEXT

Go To Step 10

9

DTC Chart (See page 

DI–729

)

NEXT

10

Circuit Inspection (See page 

DI–731

 to 

DI–793

)

NEXT

11

Identification of Problem

NEXT

12

Repair

NEXT

–

DIAGNOSTICS

AIR SUSPENSION SYSTEM

DI–709

903

13

Confirmation Test

NEXT

End

HINT:
Step 4, 7, 10, 13:
Diagnostic steps permitting use of the hand–held tester.

DIDCS–01

Air Suspension System Check Sheet

:

Always
Once only

Sometimes (      times per   day,  month)

Inspector’s
Name

Customer’s Name

/                  /

Odometer Reading

/                  /

Frequency Problem Occurs

Weather

Outdoor Temperature

Symptoms

Place

Conditions When 
Problem Occurred

Cloudy

Fine

Rainy

Snowy

Various/Other

Cool

Warm

Hot
Cold (Approx.           

°

F (     

°

C))

Rough Road

Inner City

Hill (Up, Down)

Other

Suburbs

Highway

Vehicle height cannot be changed by operating the
height control switch

Normal System Code

Malfunction in
vehicle height
control

Other (                                  )

High speed control does not operate

Trouble Code (Code        )

Normal System Code

Trouble Code (Code        )

DTC Check

2nd Time

1st Time

Indicator lamp does 
not come on

Height control manual indicator lamp does not come on

Height control indicator lamp does not come on

Licence Plate No.

VIN

Production Date

Other

km
miles

DI–710

–

DIAGNOSTICS

AIR SUSPENSION SYSTEM

904

CUSTOMER PROBLEM ANALYSIS CHECK