2001 TOYOTA SEQUOIA Page 18

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1611
1805 Author: Date:
2005 SEQUOIA (RM1146U)
6 Problem Symptoms Table (See page DI±1614)
NEXT
7 Circuit Inspection (See page DI±1628 to DI±1658)
NEXT
8 Identification of Problem
NEXT
9 Repair
NEXT
10 Confirmation Test
NEXT
End

DID8U±01
DI±1614
± DIAGNOSTICSCOMBINATION METER SYSTEM
1808 Author: Date:
2005 SEQUOIA (RM1146U)
PROBLEM SYMPTOMS TABLE
HINT:
Inspect the related ºFuseº and ºRelayº before confirming the suspected area as shown in the table below.
MALFUNCTION SYSTEM:
SymptomSuspected AreaSee page
Entire combination meter does not operate.Refer to troubleshooting proceduresDI±1628
Operating light control rheostat does not change light brightness.Refer to troubleshooting proceduresDI±1645
Seat belt warning does not operate.Refer to troubleshooting proceduresDI±1650
Key reminder warning buzzer does not sound.
1. Multiplex communication system
2. Key unlock warning switch circuit
3. Door courtesy lamp switch circuit
4. Combination meter assyDI±1892
DI±1715
DI±1728
IN±35
METER GAUGES:
SymptomSuspected AreaSee page
Malfunction in speedometerRefer to troubleshooting proceduresDI±1632
Malfunction in tachometerRefer to troubleshooting proceduresDI±1636
Malfunction in fuel receiver gaugeRefer to troubleshooting proceduresDI±1640
Malfunction in engine coolant temperature receiver gaugeRefer to troubleshooting proceduresDI±1644
Malfunction in oil pressure receiver gaugeRefer to troubleshooting proceduresDI±1654
Malfunction in volt meterRefer to troubleshooting proceduresDI±1658
WARNING LIGHTS:
SymptomSuspected AreaSee page
Check engine warning light (MIL) does not come on.
1. ECM
2. Wire harness or connector
3. Combination meter assyDI±9
±
IN±35
Discharge warning light does not come on.
1. ECM
2. Wire harness or connector
3. Combination meter assyDI±9
±
IN±35
Brake warning light does not come on.
1. Skid control ECU
2. Wire harness or connector
3. Combination meter assyDI±895
±
IN±35
ABS warning light does not come on.
1. Skid control ECU
2. Wire harness or connector
3. Combination meter assyDI±895
±
IN±35
SRS warning light does not come on.
1. Airbag sensor assy
2. Wire harness or connector
3. Combination meter assyDI±1126
±
IN±35
Open door warning light does not come on.
1. Door courtesy light switch circuit
2. Wire harness or connector
3. Combination meter assy
4. Body ECUDI±1728
±
IN±35
IN±35
Fuel level warning light does not come on.
1. Refer to troubleshooting
2. Wire harness or connector
3. Combination meter assyDI±1640
±
IN±35
Low oil pressure warning light does not come on.
1. Low oil pressure warning switch
2. Wire harness or connector
3. Combination meter assyBE±55
±
IN±35

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1615
1809 Author: Date:
2005 SEQUOIA (RM1146U) Seat belt warning lamp for driver's seat does not operate.
Refer to troubleshooting proceduresDI±1650
SLIP warning light does not come on.
1. SLIP warning light circuit
2. Wire harness and connector
3. Combination meter assy
4. Skid control ECUDI±1041
±
IN±35
IN±35
INDICATOR LIGHTS:
SymptomSuspected AreaSee page
Turn indicator light does not come on.
1. Turn signal flasher relay
2. Wire harness or connector
3. Combination meter assyBE±36
±
IN±35
High beam indicator light does not come on.
1. Headlight dimmer switch (*1)
Headlight dimmer switch circuit (*2)
2. Wire harness or connector
3. Combination meter assyBE±27
DI±1755
±
IN±35
Washer level indicator light does not come on.
1. Washer level warning switch
2. Wire harness or connector
3. Combination meter assyBE±49
±
IN±35
Tire pressure indicator light does not come on.
1. Tire pressure monitor ECU
2. Wire harness or connector
3. Combination meter assyDI±873
±
IN±35
CRUISE main indicator light does not come on.
1. CRUISE main indicator light circuit
2. Cruise main control switch circuit
3. Wire harness or connector
4. Combination meter assyDI±1557
DI±1561
±
IN±35
VSC OFF indicator light does not come on.1. VSC OFF indicator light circuit
2. Combination meter assyDI±1048
IN±35
VSC TRAC indicator light does not come on.1. VSC TRAC indicator light circuit
2. Combination meter assyDI±1027
IN±35
Security indicator light does not come on.1. Security indicator light circuit
2. Combination meter assyDI±1731
IN±35
4HI indicator light does not come on.
1. Wire harness and connector
2. Combination meter assy
3. 4WD control ECU±
IN±35
IN±35
4LO indicator light does not come on.
1. Wire harness and connector
2. Combination meter assy
3. 4WD control ECU±
IN±35
IN±35
CTR DIF LOCK indicator light does not come on.
1. Wire harness and connector
2. Combination meter assy
3. 4WD control ECU±
IN±35
IN±35
Height control indicator lamp does not come on.1. Height control indicator lamp circuit
2. Combination meter assyDI±785
IN±35
Height control manual indicator lamp does not come on.1. Height control manual indicator lamp circuit
2. Combination meter assyDI±789
IN±35
A/T indicator light does not come on.
1. Park/neutral position switch circuit
2. Wire harness and connector
3. Combination meter assyDI±576
±
IN±35
*1: w/o Day time running light
*2: w/ Day time running light
OTHERS:
SymptomSuspected AreaSee page
All buzzers (key reminder, seat belt) do not operate.Combination meter assyIN±35

I28569
C5±3
C5±28
Combination Meter:
I28570
C6±12
C6±24
C6±23
Combination Meter:
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1631
1825 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect combination meter (Power source).
PREPARATION:
Disconnect the combination meter connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Terminal NoConditionSpecified condition
C6±12 ± Body groundAlwaysBelow 1 W
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Terminal NoConditionSpecified condition
C6±23 ± Body groundAlways10 to 14 V
C5±28 ± Body groundIgnition switch ON10 to 14 V
C6±24 ± Body groundIgnition switch ON10 to 14 V
C5±3 ± Body groundIgnition switch ST10 to 14 V
NG Repair or replace harness or connector.
OK
Replace combination meter
(See page IN±35).

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1633
1827 Author: Date:
2005 SEQUOIA (RM1146U)
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 ON, and push the hand±held tester main switch ON.
CHECK:
From the display on the tester, perform the ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
SPEED METER0 / 40 (24) / 80 (48) / 120 (72) / 160 (96) /
200 (120) km/h (mph)The needle position should be within the accept-
able tolerance.
OK:
Speedometer readings change according to hand±held tester operation.
NG Replace combination meter
(See page IN±35).
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 ºDATA LISTº.
METER:
ItemMeasurement Item/
Range (Display)Normal ConditionDiagnostic Note
SPEED METER
Vehicle Speedometer /
Min.: 0 km/h (0 mph)
Max.: 255 km/h (158 mph)Almost the same as actual vehicle
speed (When driving)
OK:
Vehicle speed displayed on the tester is almost the same as the actual vehicle speed.
OK Replace combination meter
(See page IN±35).
NG

I28569
Combination Meter:
C5±24
I28570
Combination Meter:
C6±12
C6±10
I28573
Vehicle Speed Sensor
Wire Harness Side:
V1
± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1635
1829 Author: Date:
2005 SEQUOIA (RM1146U)
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 connectionConditionSpecified condition
C5±24 ± V1±3AlwaysBelow 1 W
C6±10 ± V1±2AlwaysBelow 1 W
C6±12 ± Body groundAlwaysBelow 1 W
C5±24 ± Body groundAlways10 kW or higher
C6±10 ± Body groundAlways10 kW or higher
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connectionConditionSpecified condition
V1±1 ± Body groundIgnition switch OFFBelow 1 V
V1±1 ± Body groundIgnition switch ON10 to 14 V
NG Repair or replace harness or connector.
OK
Replace combination meter
(See page IN±35).

± DIAGNOSTICSCOMBINATION METER SYSTEM
DI±1637
1831 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
TACHOMETER0 rpm / 1,000 rpm / 2,000 rpm / 3,000 rpm / 4,000
rpm / 5,000 rpm / 6,000 rpm / 7,000 rpmConfirm 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 IN±35).
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 ºDATA LISTº.
METER:
ItemMeasurement Item/
Range (Display)Normal ConditionDiagnostic Note
TACHO METEREngine RPM /
Min.: 0 rpm Max.: 12,750 rpmAlmost 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 IN±35).
NG

I28571
C5±23
Combination Meter:
I28567
GND
DI±1638
± DIAGNOSTICSCOMBINATION METER SYSTEM
1832 Author: Date:
2005 SEQUOIA (RM1146U)
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.
ItemCondition
Tool setting5 V/DIV, 10 ms/DIV
Vehicle conditionEngine 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 IN±35).
NG