2003 TOYOTA AVENSIS engine coolant




3020
10
5
3
02040
0.1 1
0.3 0.2
0.5 2
60 80 100
±20
(±4) (104) (140) (176)
(32) (68) (212)
Z17274
Ohmmeter
Acceptable
Temperature
C (
F)
Resistance k

THF E2
A30331
30
20
10




0.5
0.3
0.2
0.1
±20

20 40 60
80 100
F14741(±4) (104) (140) (176)
(32) (68) (212)
A56276
Temperature
C (
F)
Resistance k

±
ENGINE CONTROL SYSTEM ECD SYSTEM (1CD±FTV)
10±57
AVENSIS REPAIR MANUAL (RM1018E)
3. INSPECT DIESEL ENGINE ENGINE COOLANT
TEMPERATURE SENSOR
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-tween each terminal.
Resistance:
Approx. 20
C (68
F) 2.32 to 2.59 k

Approx. 80
C (176
F) 0.310 to 0.326 k

NOTICE:
In case of checking the water temperature sensor in the wa-
ter, be careful not to allow water to go into the terminals,
and after checking, wipe out the sensor.
4. INSPECT INJECTION OR SUPPLY PUMP ASSY
(a) Resistance inspection. (Fuel temperature sensor) (1) Using an ohmmeter, measure the resistance be-tween each terminal.
Resistance:
Approx. 20
C (68
F) 2.21 to 2.69 k

Approx. 80
C (176
F) 0.287 to 0.349 k

5. INSPECT DIESEL TURBO INLET AIR TENPERATURE SENSOR
(a) Resistance inspection. (1) Using an ohmmeter, measure the resistance be-
tween each terminal.
Resistance:
Approx. 20
C (68
F) 2.21 to 2.65 k

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100FL±01
A77917
A77918
(a)
(b)
A77919
10±34
±
ENGINE CONTROL SYSTEMKNOCK SENSOR(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
1.DISCHARGE FUEL SYSTEM PRESSURE (See page 11±15)
2.REMOVE ENGINE ROOM COVER SIDE (See page 10±26)
3.REMOVE RADIATOR SUPPORT OPENING COVER (See page 10±26)
4.ENGINE COOLANT (See page 16±19)
5.REMOVE ENGINE COVER SUB±ASSY NO.1 (See page 10±26)
6.REMOVE AIR CLEANER CAP SUB±ASSY (See page 10±26)
7.SEPARATE ACCELERATOR CONTROL CABLE ASSY (See page 10±26)
8.REMOVE THROTTLE BODY ASSY (See page 10±26)
9.DISCONNECT FUEL TUBE SUB±ASSY (See page 11±26) SST 09268±21010
10.REMOVE FUEL DELIVERY PIPE SUB±ASSY (See page 11±26)
11. REMOVE VARIABLE RESISTOR (LHD STEERINGPOSITION TYPE, LEADED GASOLINE)
(a) Disconnect the variable resistor connector.
(b) Remove the bolt, and then remove the variable resistor.
12. REMOVE CHARCOAL CANISTER ASSY
(a) Disconnect the charcoal canister outlet hose No. 1.
(b) Disconnect the fuel hose.
(c) Pull up and remove the charcoal canister.
13. DISCONNECT HEATER INLET WATER HOSE
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10±36
±
ENGINE CONTROL SYSTEMKNOCK SENSOR(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
18.INSTALL INTAKE MANIFOLD INSULATOR NO.1
19.INSTALL INTAKE MANIFOLD
(a)Install a new gasket to the intake manifold.
(b)Install the intake manifold with the 5 bolts and 2 nuts. Torque: 30 N
m (306 kgf
cm, 22 ft
lbf)
(c)Install the wire harness clamp.
(d)Connect the union to connector tube hose.
20.CONNECT HEATER INLET WATER HOSE
21.INSTALL CHARCOAL CANISTER ASSY
22.INSTALL VARIABLE RESISTOR (LHD STEERING POSITION TYPE, LEADED GASOLINE) Torque: 5.0 N
m (51 kgf
cm, 44 in.
lbf)
23.INSTALL FUEL DELIVERY PIPE SUB±ASSY (See page 11±26)
24.CONNECT FUEL TUBE SUB±ASSY (See page 11±26)
25.INSTALL THROTTLE BODY ASSY (See page 10±26)
26.INSTALL ACCELERATOR CONTROL CABLE ASSY (See page 10±26)
27. INSTALL AIR CLEANER CAP SUB±ASSY
28.ADD ENGINE COOLANT (See page 16±19)
29.CHECK FOR ENGINE COOLANT LEAKS (See page 16±13)
30.CHECK FOR FUEL LEAKS (See page 11±19)
31.INSTALL ENGINE COVER SUB±ASSY NO.1 (See page 10±26)
32. INSTALL ENGINE ROOM COVER SIDE
33. INSTALL RADIATOR SUPPORT OPENING COVER
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100FL±01
A77917
A77918
(a)
(b)
A77919
10±34
±
ENGINE CONTROL SYSTEMKNOCK SENSOR(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
1.DISCHARGE FUEL SYSTEM PRESSURE (See page 11±15)
2.REMOVE ENGINE ROOM COVER SIDE (See page 10±26)
3.REMOVE RADIATOR SUPPORT OPENING COVER (See page 10±26)
4.ENGINE COOLANT (See page 16±19)
5.REMOVE ENGINE COVER SUB±ASSY NO.1 (See page 10±26)
6.REMOVE AIR CLEANER CAP SUB±ASSY (See page 10±26)
7.SEPARATE ACCELERATOR CONTROL CABLE ASSY (See page 10±26)
8.REMOVE THROTTLE BODY ASSY (See page 10±26)
9.DISCONNECT FUEL TUBE SUB±ASSY (See page 11±26) SST 09268±21010
10.REMOVE FUEL DELIVERY PIPE SUB±ASSY (See page 11±26)
11. REMOVE VARIABLE RESISTOR (LHD STEERINGPOSITION TYPE, LEADED GASOLINE)
(a) Disconnect the variable resistor connector.
(b) Remove the bolt, and then remove the variable resistor.
12. REMOVE CHARCOAL CANISTER ASSY
(a) Disconnect the charcoal canister outlet hose No. 1.
(b) Disconnect the fuel hose.
(c) Pull up and remove the charcoal canister.
13. DISCONNECT HEATER INLET WATER HOSE
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10±36
±
ENGINE CONTROL SYSTEMKNOCK SENSOR(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
18.INSTALL INTAKE MANIFOLD INSULATOR NO.1
19.INSTALL INTAKE MANIFOLD
(a)Install a new gasket to the intake manifold.
(b)Install the intake manifold with the 5 bolts and 2 nuts. Torque: 30 N
m (306 kgf
cm, 22 ft
lbf)
(c)Install the wire harness clamp.
(d)Connect the union to connector tube hose.
20.CONNECT HEATER INLET WATER HOSE
21.INSTALL CHARCOAL CANISTER ASSY
22.INSTALL VARIABLE RESISTOR (LHD STEERING POSITION TYPE, LEADED GASOLINE) Torque: 5.0 N
m (51 kgf
cm, 44 in.
lbf)
23.INSTALL FUEL DELIVERY PIPE SUB±ASSY (See page 11±26)
24.CONNECT FUEL TUBE SUB±ASSY (See page 11±26)
25.INSTALL THROTTLE BODY ASSY (See page 10±26)
26.INSTALL ACCELERATOR CONTROL CABLE ASSY (See page 10±26)
27. INSTALL AIR CLEANER CAP SUB±ASSY
28.ADD ENGINE COOLANT (See page 16±19)
29.CHECK FOR ENGINE COOLANT LEAKS (See page 16±13)
30.CHECK FOR FUEL LEAKS (See page 11±19)
31.INSTALL ENGINE COVER SUB±ASSY NO.1 (See page 10±26)
32. INSTALL ENGINE ROOM COVER SIDE
33. INSTALL RADIATOR SUPPORT OPENING COVER
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100FA±01
A79596
A78436
10

10
Upper
Engine
Front
10±52
±
ENGINE CONTROL SYSTEMKNOCK SENSOR(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
1.DISCHARGE FUEL SYSTEM PRESSURE (See page 11±30)
2.REMOVE RADIATOR SUPPORT OPENING COVER (See page 18±16)
3.REMOVE ENGINE ROOM COVER SIDE (See page 18±17)
4.REMOVE ENGINE COVER SUB±ASSY NO.1 (See page 10±44)
5.DRAIN ENGINE COOLANT (See page 16±31)
6.REMOVE AIR CLEANER CAP SUB±ASSY (See page 10±44)
7.REMOVE THROTTLE BODY ASSY (See page 10±44)
8.REMOVE CHARCOAL CANISTER ASSY
9.REMOVE ENGINE COVER BRACKET (See page 11±52)
10.REMOVE FUEL PUMP ASSY (See page 11±52)
11.REMOVE INTAKE MANIFOLD (See page 11±42)
12.REMOVE SURGE TANK STAY NO.1 (See page 11±42)
13.REMOVE INTAKE MANIFOLD INSULATOR NO.2 (See page 11±42) 14.REMOVE KNOCK SENSOR
(a)Remove the nut and the knock sensor.
15.INSTALL KNOCK SENSOR
(a)Install the knock sensor with the nut as shown in the il-lustration.
Torque: 20 N
m (204 kgf
cm, 15 ft
lbf)
16.INSTALL INTAKE MANIFOLD INSULATOR NO.2 (See page 11±42)
17.INSTALL SURGE TANK STAY NO.1 (See page 11±42)
18.INSTALL INTAKE MANIFOLD (See page 11±42)
19.INSTALL FUEL PUMP ASSY (See page 11±52)
20. INSTALL ENGINE COVER BRACKET
(a) Install the engine cover bracket and the bolt. Torque: 38 N
m (388 kgf
cm, 28 ft
lbf)
21. INSTALL CHARCOAL CANISTER ASSY
22.INSTALL THROTTLE BODY ASSY (See page 10±44)
23.INSTALL AIR CLEANER CAP SUB±ASSY (See page 10±44)
24.ADD ENGINE COOLANT (See page 16±31)
25.CHECK FOR ENGINE COOLANT LEAKS (See page 16±25)
26. CHECK FOR FUEL LEAKS
27. INSTALL ENGINE COVER SUB±ASSY NO.1
Torque: 7.0 N
m (71 kgf
cm, 62 in.
lbf)
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TEMPERATURE
C(
F)
RESISTANCE k
30
20
10
5
2
1
0.5
0.3
0.2
0.1 3
±20 0 20 40 60 80 100
(±4) (32) (80) (140)(104)
(212)
(176)
A50371
A65174
Ohmmeter
E34090
10±22
±
ENGINE CONTROL SYSTEM SFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
5. INSPECT ENGINE COOLANT TEMPERA TURE
SENSOR
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-tween each terminal.
Resistance:
Approx. 20
C (68
F) 2.32 to 2.59k
Approx. 80
C (176
F) 0.310 to 0.326k 
NOTICE:
In case of checking the water temperature sensor in the wa-
ter, be careful not to allow water to go into the terminals,
and after checking, wipe out the sensor.
6. INSPECT KNOCK SENSOR
(a) Using an ohmmeter, measure the resistance between ter- minals.
Resistance: 120 to 280 k at 20
C (68
F)
HINT:
If the resistance is not specified, replace the sensor.
7. INSPECT EFI RELAY
(a) Inspect the relay continuity.
(1) Using an ohmmeter, check that there is continuitybetween terminals 1 and 2.
Specified condition: Continuity
(2) Check that there is no continuity between terminals 3 and 5.
Specified condition: No continuity
(b) Inspect the relay operation. (1) Apply battery voltage across terminals 1 and 2.
(2) Using an ohmmeter, check that there is continuitybetween terminals 3 and 5.
Specified condition: Continuity
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TEMPERATURE
C(
F)
RESISTANCE k
30
20
10
5
2
1
0.5
0.3
0.2
0.1 3
±20 0 20 40 60 80 100
(±4) (32) (80) (140)(104)
(212)
(176)
A50371
A65174
Ohmmeter
E34090
10±40
±
ENGINE CONTROL SYSTEM SFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4. INSPECT ENGINE COOLANT TEMPERA TURE
SENSOR
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-tween each terminal.
Resistance:
Approx. 20
C (68
F) 2.32 to 2.59k
Approx. 80
C (176
F) 0.310 to 0.326k 
NOTICE:
In case of checking the water temperature sensor in the wa-
ter, be careful not to allow water to go into the terminals,
and after checking, wipe out the sensor.
5. INSPECT KNOCK SENSOR
(a) Using an ohmmeter, measure the resistance between ter- minals.
Resistance: 120 to 280 k at 20
C (68
F)
HINT:
If the resistance is not specified, replace the sensor.
6. INSPECT EFI RELAY
(a) Inspect the relay continuity.
(1) Using an ohmmeter, check that there is continuitybetween terminals 1 and 2.
Specified condition: Continuity
(2) Check that there is no continuity between terminals 3 and 5.
Specified condition: No continuity
(b) Inspect the relay operation. (1) Apply battery voltage across terminals 1 and 2.
(2) Using an ohmmeter, check that there is continuitybetween terminals 3 and 5.
Specified condition: Continuity
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