TOYOTA LAND CRUISER 1998 Factory Repair Manual

DI-252
- DIAGNOSTICSENGINE
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: Date
:
7 Check operation of EVAP VSV (See page SF-44).
NG Replace EVAP VSV.
OK
8 Check for open and short in harness and connector between EFI or ECD relay
and EVAP VSV, and EVAP VSV and ECM (See page IN-36).
NG Repair or replace harness or connector.
OK
Replace ECM (See page SF-60).

A10150A10149BE6653
A10281VSV is OFFVSV is ON ON
Air
FAir
E
F E
- DIAGNOSTICSENGINE
DI-253
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9 Check CCV.
PREPARATION:
(a) Disconnect the vacuum hose for the CCV from the char-
coal canister.
(b) Turn the ignition switch ON and push the hand-held tes-
ter main switch ON.
(c) Select the ºENHANCED OBD II / ACTIVE TESTº mode on
the hand-held tester.
(d) Select the item ºCAN CTRL VSV / ALLº in the ACTIVE
TEST and operate CAN CTRL VSV (Press the right or left
button).
CHECK:
Check the VSV operation when it is operated by the hand-held
tester.
OK:
VSV is ON:
Air does not flow from port E to port F.
VSV is OFF:
Air from port E flows out through port F.
OK Go to step 13.
NG
10 Check vacuum hose between CCV and charcoal canister.
CHECK:
(a) Check that the vacuum hose is connected correctly.
(b) Check the vacuum hose for looseness and disconnection.
(c) Check the vacuum hose for cracks, hole damage, and blockage.
NG Repair or replace vacuum hose.
OK

BE6653A10143A10144A10801VSV is ONVSV is OFF ON
Air
Air
E
FE
F
DI-254
- DIAGNOSTICSENGINE
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11 Check operation of CCV (See page SF-48).
NG Replace CCV.
OK
12 Check for open and short in harness and connector between EFI or ECD relay
and CCV, and CCV and ECM (See page IN-36).
NG Repair or replace harness or connector.
OK
Replace ECM (See page SF-60).
13 Check pressure switching valve.
PREPARATION:
(a) Turn the ignition switch ON and push the hand-held tes-
ter main switch ON.
(b) Select the ºENHANCED OBD II / ACTIVE TESTº mode on
the hand-held tester.
(c) Select the item ºTANK BYPASS VSV / ALLº in the AC-
TIVE TEST and operate TANK BYPASS VSV (press the
right or left button).
CHECK:
Check the VSV operation when it is operated by the hand-held
tester.
OK:
VSV is ON:
Air from port E flows out through port F.
VSV is OFF:
Air does not flow from port E to port F.
OK Go to step 16.
NG

A10193
A20058
- DIAGNOSTICSENGINE
DI-255
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:
14 Check operation of pressure switching valve (See page SF-46).
NG Replace pressure switching valve.
OK
15 Check for open and short in harness and connector between EFI or ECD relay
and pressure switching valve, and pressure switching valve and ECM (See page
IN-36).
NG Repair or replace harness or connector.
OK
Replace ECM (See page SF-60).
16 Check whether hose close to fuel tank has been modified, and check whether
there are signs of any accident near fuel tank or charcoal canister.
CHECK:
Check for cracks, deformation and loose connection of the fol-
lowing parts:

Fuel tank

Charcoal canister

Fuel tank filler pipe

Hoses and tubes around fuel tank and charcoal
canister
NG Repair or replace evaporative emissions leak
part.
OK

A19522A19630
VC
E2(+)
(-) E5
ECM Connector
DI-256
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17 Check vacuum hoses between vapor pressure sensor and fuel tank, and char-
coal canister and pressure switching valve.
CHECK:
(a) Check that the vacuum hose is connected correctly.
(b) Check the vacuum hose for looseness and disconnection.
(c) Check the vacuum hose for cracks, hole and damage.
NG Repair or replace vacuum hose and tube.
OK
18 Check hose and tube between fuel tank and charcoal canister.
CHECK:
(a) Check for proper connection of the fuel tank and fuel evap pipe (See page EC-2), fuel evap pipe and
fuel tube under the floor, fuel tube under the floor and charcoal canister.
(b) Check the hose and tube for cracks, hole and damage.
NG Repair or replace hose and tube.
OK
19 Check voltage between terminals VC and E2 of ECM connector.
CHECK:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals of the E5 ECM connec-
tor.
OK:
Tester ConnectionSpecified Condition
VC (E5-18) - E2 (E5-28)4.5 to 5.5 V
NG Replace ECM (See page SF-60).
OK

A19627A19432
A19637
E2PTNK
Vacuum Disconnect(+)
(-) E5
E9
- DIAGNOSTICSENGINE
DI-257
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20 Check voltage between terminals PTNK and E2 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment door (See page
SF-60).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals PTNK and E2 of the
ECM connectors at following condition (1) and (2).
(1) Disconnect the vacuum hose from the vapor pres-
sure sensor.
(2) Using the MITYVAC (Hand-Held Vacuum Pump),
apply a vacuum of 4.0 kPa (30 mmHg, 1.18 in.Hg)
to the vapor pressure sensor.
NOTICE:
The vacuum applied to the vapor pressure sensor must be
less than 66.7 kPa (500 mmHg, 19.7 in.Hg).
OK:
Condition (1) Voltage: 2.9 to 3.7 V
Condition (2) Voltage: 0.5 V or less
OK Go to step 22.
NG
21 Check for open and short in harness and connector between vapor pressure
sensor and ECM (See page IN-36).
NG Repair or replace harness or connector.
OK
Replace ECM (See page SF-60).
22 Check fuel tank inlet valve.
NG Replace fuel tank inlet valve.
OK

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23 Check fuel tank.
NG Replace fuel tank.
OK
24 Check charcoal canister for cranks, hole and damage.
NG Replace charcoal canister.
OK
Replace ECM (See page SF-60).

- DIAGNOSTICSENGINE
DI-259
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OBD II scan tool (excluding hand-held tester):
1 Check that fuel tank cap meets OEM specifications.
NG Replace with a cap that meets OEM specifica-
tions.
OK
2 Check that fuel tank cap is correctly installed.
NG Correctly install fuel tank cap.
OK
3 Check fuel tank cap (See page EC-5).
NG Replace fuel tank cap.
OK
4 Check filler neck for damage.
PREPARATION:
Remove the fuel tank cap.
CHECK:
Visually inspect the filler neck for damage.
NG Replace filler pipe.
OK

A10193
A20058
DI-260
- DIAGNOSTICSENGINE
453 Author
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5 Check whether hose close to fuel tank has been modified, and check whether
there are signs of any accident near fuel tank or charcoal canister.
CHECK:
Check for cracks, deformation and loose connection of the fol-
lowing parts:

Fuel tank

Charcoal canister

Fuel tank filler pipe

Hoses and tubes around fuel tank and charcoal
canister
NG Repair or replace evaporative emission leak
part.
OK
6 Check vacuum hoses between vapor pressure sensor and fuel tank, charcoal
canister and pressure switching valve, and pressure switching valve and char-
coal canister.
CHECK:
(a) Check that the vacuum hose is connected correctly.
(b) Check the vacuum hose for looseness and disconnection.
(c) Check the vacuum hose for cracks, hole and damage.
NG Repair or replace vacuum hose.
OK
7 Check hose and tube between fuel tank and charcoal canister.
CHECK:
(a) Check for proper connection of the fuel tank and fuel evap pipe (See page EC-2), fuel evap pipe and
fuel tube under the floor, fuel tube under the floor and charcoal canister.
(b) Check the hose and tube for cracks, hole and damage.
NG Repair or replace hose and tube.
OK

- DIAGNOSTICSENGINE
DI-261
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8 Check vacuum hoses ((5), (6), (7), (8) and (9) in Fig. 1 in circuit description).
CHECK:
(a) Check that the vacuum hose is connected correctly.
(b) Check the vacuum hose for looseness and disconnection.
(c) Check the vacuum hose for cracks, hole damage, and blockage.
NG Repair or replace vacuum hose.
OK
9 Check VSV connector for EVAP, VSV connector for CCV, VSV connector for pres-
sure switching valve and vapor pressure sensor connector for looseness and
disconnection.
NG Repair or connect VSV or sensor connector.
OK
10 Check charcoal canister for cracks, hole and damage.
NG Replace charcoal canister.
OK