2001 TOYOTA PRIUS engine coolant

I18376
ECM
E9 THW14
E2 18 E2
Engine Coolant Temp. SensorW
B±RE9 2
1 DI±890
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2001 PRIUS (RM778U)
DTC 14 Engine Coolant Temperature Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects the engine coolant temperature and sends the appropriate signals to the A/C amplifier.
These signals are used for warm up control when the engine is cold.
DTC No.Detection ItemTrouble Area
14Ohtittt iit

Water temperature sensor

Harness or connector between engine coolant temp. sensor
d ECM14Open or short in water temperature sensor circuit.and ECM

Harness or connector between ECM and A/C amplifier

A/C amplifier
WIRING DIAGRAM
DI7S8±01

S05502
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±891
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check engine coolant temp. sensor using hand±held tester.
PREPARATION:
Connect the hand±held tester to the DLC3.
CHECK:
Check the engine coolant temp. sensor using DATA LIST.
OK Check or replace A/C amplifier.
NG
2 Check engine coolant temp. sensor.
PREPARATION:
Remove engine coolant temp. sensor.
CHECK:
Measure resistance between terminals.
OK:
Resistance is within acceptable zone on chart.
Water temperatureResistance
20°C (68°F)2 ± 3 kW
80°C (176°F)0.2 ± 0.4 kW
NG Replace engine coolant temp. sensor.
OK

DI±892
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2001 PRIUS (RM778U)
3 Check for open and short in harness and connector between ECM and engine
coolant temp. sensor (See page IN±41).
NG Repair or replace harness or connector.
OK
Check multiplex communication system (See page DI±750).

DI±956
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2001 PRIUS (RM778U)
6 Check engine coolant temp. switch (See page AC±84).
NG Replace water temp. switch.
OK
7 Check harness and connector between A/C amplifier and pressure switch, pres-
sure switch and body ground (See page IN±41).
NG Repair and replace harness and connector.
OK
8 Check harness and connector between A/C amplifier and water temp. switch, wa-
ter temp. switch and body ground (See page IN±41).
NG Repair and replace harness and connector.
OK
Check and replace A/C amplifier.

EM173±04
A13942
Hood to Cowl Top
seal
VSV for EVAPR/B (ABS) Air Cleaner
Assembly
RH Engine Mounting
Insulator Engine Coolant
Reservoir Tank
Engine Under
Cover RH
N´m (kgf´cm, ft´lbf) : Specified torqueOuter Front Cowl
Top Panel Air Inlet
60 (612, 44)
52 (530, 38)
52 (530, 38)
26 (265, 19)Brake Reservoir
Tank
Wiper Motor and
Wiper Link
Assembly
Cowl Top Ventilator
Lower LH
Cowl Top Ventilator
Lower RH
Wiper Arm
7 (71, 62 in. lbf)
26 (265, 19)
± ENGINE MECHANICALTIMING CHAIN
EM±13
1129 Author: Date:
2001 PRIUS (RM778U)
TIMING CHAIN
COMPONENTS

EM1IU±03
A13907
A13908
A13934
A13943
± ENGINE MECHANICALTIMING CHAIN
EM±15
2001 PRIUS (RM778U)
REMOVAL
1. DISCONNECT BATTERY NEGATIVE (±) TERMINAL
AND HV BATTERY SERVICE PLUG
(See page HV±1)
2. REMOVE OUTER FR COWL TOP PANEL ASSEMBLY
(See page BO±32)
3. REMOVE RH ENGINE UNDER COVER
4. DRAIN ENGINE COOLANT
5. REMOVE AIR CLEANER ASSEMBLY
(a) Disconnect the MAF meter connector.
(b) Disconnect the EVAP hose from the air cleaner case.
(c) Loosen the 2 hose clamps.
(d) Remove the 3 bolts and air cleaner assembly.
6. REMOVE BRAKE RESERVOIR TANK
(a) Disconnect the brake fluid level sensor connector.
(b) Remove the 2 bolts and remove the reservoir tank and
suspend it.
(c) Remove the 3 bolts and reservoir tank bracket.
7. DISCONNECT CONNECTORS
(a) Disconnect the 4 ignition connectors.
(b) Disconnect the 4 injector connectors.
(c) Disconnect the 2 VSV connectors.
(d) Disconnect the camshaft position sensor connector.
(e) Disconnect the water temperature connector.
(f) Disconnect the Camshaft timing oil control valve connec-
tor.
8. REMOVE AIR INLET
9. REMOVE ENGINE COOLANT RESERVOIR TANK
10. REMOVE VSV FROM ENGINE MOUNTING INSULA-
TOR
11. REMOVE DRIVE BELT

A11262
SST
SST
B00301
Seal
Packing
A11222
1
23
4
5
6
7
8
9
10
11
B11761
A13928
EM±24
± ENGINE MECHANICALTIMING CHAIN
2001 PRIUS (RM778U)
7. INSTALL CRANKSHAFT PULLEY
(a) Clean the crankshaft pulley inside.
(b) Install the pin to the crankshaft.
(c) Align the hole in the crank pulley with the pin position and
install the crank pulley.
(d) Using SST, install the pulley bolt.
SST 09213±70010, 09330±00021
Torque: 128 N´m (1,300 kgf´cm, 94 ft´lbf)
8. INSTALL CYLINDER HEAD COVER
(a) Remove any old packing (FIPG) material.
(b) Apply seal packing to 2 locations as shown in the illustra-
tion.
Seal packing:
Part No. 08826 ± 00080 or equivalent
(c) Install the gasket to the cylinder head cover.
HINT:
Part must be assembled within 3 minutes of application.
Otherwise the material must be remove and reapplied.
(d) Install the cylinder head cover and cable bracket with the
7 bolts, 2 seal washers and 2 nuts.
Uniformly tighten the bolts and nuts, in the several
passes, in the sequence shown.
Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
(e) Connect the 2 PCV hoses to the cylinder head cover.
9. CONNECT ENGINE WIRE TO CYLINDER HEAD COV-
ER
10. INSTALL IGNITION COILS (See page IG±7)
11. REMOVE RH ENGINE MOUNTING INSULATOR
Install the RH engine mounting insulator with the 5 bolts and 2
nuts.
12. INSTALL VSV TO RH ENGINE MOUNTING INSULA-
TOR
13. INSTALL DRIVE BELT
14. INSTALL ENGINE COOLANT RESERVOIR TANK
15. INSTALL AIR INLET

A13934
A13907
± ENGINE MECHANICALTIMING CHAIN
EM±25
2001 PRIUS (RM778U)
16. CONNECT CONNECTORS
(a) Connect the Camshaft timing oil control valve connector.
(b) Connect the water temperature sensor connector.
(c) Connect the camshaft position sensor connector.
(d) Connect the 2 VSV connectors.
(e) Connect the 4 injector connectors.
(f) Connect the 4 ignition connectors.
17. INSTALL AIR CLEANER ASSEMBLY
(a) Install the air cleaner assembly with the 2 bolts.
(b) Tighten the 2 hose clamps.
(c) Connect the EVAP hose to the air cleaner case.
(d) Connect the MAF meter connector.
18. INSTALL BRAKE RESERVOIR TANK
19. INSTALL OUTER FR COWL TOP PANEL ASSEMBLY
(See page BO±35)
20. FILL WITH ENGINE COOLANT
21. INSTALL ENGINE UNDER COVERS
22. CONNECT BATTERY NEGATIVE (±) TERMINAL AND
HV BATTERY SERVICE PLUG (See page HV±1)
23. ROAD TEST VEHICLE
Check for abnormal noises, shock slippage, correst shift points
and smooth operation.
24. RECHECK ENGINE COOLANT AND HV TRANSAXLE
COOLANT