Toyota Sequoia (2005). Manual — part 248
I27705
Combination Meter Wire Harness View:
C6
C6–16
C6–15
C6–14
F16805
Suspension Control ECU
Wire Harness View:
S25
NR
HI
LO
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
DI–787
981
2
Check harness and connector (Suspension control ECU – Combination meter
assy).
PREPARATION:
Disconnect the suspension control ECU connector and the
combination meter connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connection
(Symbol)
Condition
Specified condition
S25–8 (HI) – C6–16
Always
Below 1
Ω
S25–9 (NR) – C6–15
Always
Below 1
Ω
S25–26 (LO) – C6–14
Always
Below 1
Ω
S25–8 (HI) – Body ground
Always
10 k
Ω
or higher
S25–9 (NR) –
Body ground
Always
10 k
Ω
or higher
S25–26 (LO) –
Body ground
Always
10 k
Ω
or higher
NG
Repair or replace harness or connector.
OK
F16805
Suspension Control ECU
Wire Harness View:
S25
NR
HI
LO
DI–788
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
982
3
Check combination meter.
PREPARATION:
Reconnect the combination meter connector.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connection
(Symbol)
Condition
Specified condition
S25–8 (HI) – Body ground
Ignition switch ON
10 to 14 V
S25–9 (NR) –
Body ground
Ignition switch ON
10 to 14 V
S25–26 (LO) –
Body ground
Ignition switch ON
10 to 14 V
NG
Replace combination meter.
OK
Replace suspension control ECU
(See page
).
F19451
C6
Combination
Meter
Suspension Control
ECU
I18
Ignition SW
Engine Room J/B
Instrument Panel J/B
B–O
W–R
11
7
1H
1J
IGN1
1C
1C
3
2
B–R
MAN.
24
13
LG
11
S25 VN
5
IG2
AM2
6
W–R
B
Battery
1
2D
AM2
2C
1
B
5
4
F10
FL Block
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
DI–789
983
Height Control Manual Indicator Lamp Circuit
CIRCUIT DESCRIPTION
When manual mode is selected by pressing the height control mode select switch, the manual indicator lamp
comes on. (For the wiring diagram of the height control mode select switch circuit, see page
suspension control ECU detects a problem, the height control manual indicator lamp blinks while suspend-
ing the height control function. At the same time, the suspension control ECU records a DTC in the memory.
Connect terminals TC and CG of the DLC3 to make the height control manual indicator lamp blink and output
DTCs.
WIRING DIAGRAM
DIDEN–01
DI–790
–
DIAGNOSTICS
AIR SUSPENSION SYSTEM
984
INSPECTION PROCEDURE
1
Inspect height control manual indicator lamp.
PREPARATION:
Turn the ignition switch to the ON position.
CHECK:
Check that the height control manual indicator lamp comes on.
OK:
Height control manual indicator lamp comes on, and then goes off after 2 seconds.
NG
Go to combination meter
(See page
OK
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