2001 TOYOTA HIGHLANDER Service Repair Manual

wheel size horn spare tire coolant cabin filter catalytic converter

Load previous 8 pages

Page 1665 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual - DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-91
281 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR DESCRIPTION
The ECM monitors the sensor voltage and uses this value to calculate the intake

Page 1666 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual A90293
M1
MAF Meter
(IAT Sensor)ECM
4
5E2THA5 V
E7
E720
28 L-B
BR G
BR
S28S29 5
5 Short
Connector
05-92
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
282 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)

Page 1667 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual Y
A75743
A76903
A85506
M1
MAF MeterECM
THA
E2
Wire Harness Side
M1
MAF Meter
E2THA
Y
A75742
A76903A85507
M1
MAF MeterECM
THA
E2
E7
ECM THA
E2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-93
283 Author: Date:

Page 1668 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual A75766
ECM M1
MAF Meter
THA
E2
Y
A75744
A81699A85508
M1
MAF MeterECM
THA
E2
E7
ECM
05-94
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
284 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
CONFIRM GOOD CON

Page 1669 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual - DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-95
285 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT
DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT
LOW INPUT

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-95
285 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT
DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT
LOW INPUT
DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT
HIGH INPUT
CIRCUIT DESCRIPTION
A thermistor is built into the Engine Coolant Temperature (ECT) sensor and changes the resistance value
according to the engine coolant temperature.
The structure of the sensor and connection to the ECM are the same as the Intake Air Temperature (IAT)
sensor.
HINT:
If the ECM detects the DTC P0115, P0117 or P0118, it operates the fail-safe function in which the ECT is
assumed to be 80C (176F).
DTC No.Proceed toDTC Detection ConditionTrouble Area
P0115Step 1
Open or short in ECT (En-
gine coolant temperature)
sensor circuit for 0.5 se-
condsOpen or short in ECT sensor circuit
ECT sensor
ECM
P0117Step 4Short in ECT sensor circuit
for 0.5 secondsSame as DTC No. P0115
P0118Step 2Open in ECT sensor circuit
for 0.5 secondsSame as DTC No. P0115
HINT:
After confirming DTC P0115, P0117 or P0118, use the hand-held tester or the OBD II scan tool to confirm
the ECT from the ALL menu (to reach the ALL menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL).
Temperature DisplayedMalfunction
-40°C (-40°F)Open circuit
140°C (284°F) or moreShort circuit
MONITOR DESCRIPTION
The ECT sensor is used to monitor the engine coolant temperature. The ECT sensor has a thermistor that
varies its resistance depending on the temperature of the engine coolant. When the coolant temperature
is low, the resistance in the thermistor increases. When the temperature is high, the resistance drops. The
variations in resistance are reflected in the voltage output from the sensor.
The ECM monitors the sensor voltage and uses this value to calculate the engine coolant temperature.
When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a fault
in the ECT sensor and sets a DTC.
Example:
When the ECM calculates that the ECT is -40C (-40F) or more than 140C (284F) and if either condition
continues for 0.5 seconds or more, the ECM will set a DTC.
0596C-07

Page 1670 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual A90294
ECM
THW
E2
1 2 E2
ECT Sensor
5 V
R
THW
E2
E7 E7 19
28
BRG-B
BRBR
S28S29 5
5 Short
Connector 05-96
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
286 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U

Page 1671 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual - DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-97
287 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
If DTCs that are related to different systems are output simultaneously

Page 1672 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual Y
75743
A66104A85509
E2
ECT SensorECM
THW
E2
Wire Harness Side
E2
ECT Sensor
Y
A75742
A76903A85507
ECM
THW
E2
E7
ECM THW
E2E2
ECT Sensor
05-98
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
288 Author: Date:
2005

Load next 8 pages

Page: < prev 1-10 ... 1633-1640 1641-1648 1649-1656 1657-1664 1665-1672 1673-1680 1681-1688 1689-1696 1697-1704 ... 2576 next >

adblue sat nav traction control engine overheat pairing phone open hood