Toyota Sequoia (2005). Manual — part 460
I28569
Combination Meter:
C5–24
I28570
Combination Meter:
C6–12
C6–10
I28573
Vehicle Speed Sensor
Wire Harness Side:
V1
–
DIAGNOSTICS
COMBINATION METER SYSTEM
DI–1635
1829
4
Check harness and connector (Vehicle speed sensor – combination meter and
vehicle speed sensor – battery).
PREPARATION:
Disconnect the combination meter connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connection
Condition
Specified condition
C5–24 – V1–3
Always
Below 1
Ω
C6–10 – V1–2
Always
Below 1
Ω
C6–12 – Body ground
Always
Below 1
Ω
C5–24 – Body ground
Always
10 k
Ω
or higher
C6–10 – Body ground
Always
10 k
Ω
or higher
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connection
Condition
Specified condition
V1–1 – Body ground
Ignition switch OFF
Below 1 V
V1–1 – Body ground
Ignition switch ON
10 to 14 V
NG
Repair or replace harness or connector.
OK
Replace combination meter
(See page
).
I28559
E5
C5
ECU
TACH
Combination Meter
23
J/C
J14
D
J15
F
Y–G
Y–G
1
DI–1636
–
DIAGNOSTICS
COMBINATION METER SYSTEM
1830
Malfunction in tachometer
CIRCUIT DESCRIPTION
The indication on the tachometer is based on information that the ECM receives from the crankshaft position
sensor.
WIRING DIAGRAM
DID90–01
–
DIAGNOSTICS
COMBINATION METER SYSTEM
DI–1637
1831
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand–held tester and start from step 3 when not using the
hand–held tester.
1
Perform active test by hand–held tester.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch to the ON, and push the hand–held tester main switch ON.
CHECK:
From the display on the tester, perform the ”ACTIVE TEST”.
METER:
Item
Test Details
Diagnostic Note
TACHOMETER
0 rpm / 1,000 rpm / 2,000 rpm / 3,000 rpm / 4,000
rpm / 5,000 rpm / 6,000 rpm / 7,000 rpm
Confirm that the vehicle is stopped and engine is
idling.
OK:
Tachometer readings change according to hand–held tester operation.
NG
Replace combination meter
(See page
).
OK
2
Read value of hand–held tester.
PREPARATION:
(a)
Connect the hand–held tester to the DLC3.
(b)
Turn the ignition switch ON, and push the hand–held tester main switch ON.
CHECK:
Operate the hand–held tester according to the steps on the display and select ”DATA LIST”.
METER:
Item
Measurement Item/
Range (Display)
Normal Condition
Diagnostic Note
TACHO METER
Engine RPM /
Min.: 0 rpm Max.: 12,750 rpm
Almost the same as actual engine
speed (When engine is running)
OK:
Engine speed displayed on the tester is almost the same as the actual engine speed.
OK
Replace combination meter
(See page
).
NG
I28571
C5–23
Combination Meter:
I28567
GND
DI–1638
–
DIAGNOSTICS
COMBINATION METER SYSTEM
1832
3
Inspect combination meter.
PREPARATION:
(a)
Check the input signal waveform.
(1)
Remove the combination meter with the connectors
connected.
(2)
Connect the oscilloscope to terminal C5–23 and
body ground.
(3)
Start the engine.
CHECK:
Check signal waveform according to the condition(s) in the
table below.
Item
Condition
Tool setting
5 V/DIV, 10 ms/DIV
Vehicle condition
Engine idle speed
OK:
Waveform appears as shown in the illustration.
HINT:
As engine speed increases, the cycle of the signal waveform
narrows.
OK
Replace combination meter
(See page
).
NG
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