TOYOTA CAMRY 1999 Service Repair Manual

A09424
ON
VCNG2
(±)
(+) E01
A09425
ON
VCNG3
(±)(+) E01
DI±90
± DIAGNOSTICSENGINE
OK
7 Check voltage between terminals VCNG2 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals VCNG2 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).
NG
8 Check fuel shutoff valve for fuel pressure regulator (See page SF±30).
NG Replace fuel shutoff valve with fuel pressure
regulator.
OK
Check for open in harness and connector between circuit opening relay (Marking: CIR OPN) and
fuel shutoff valve for fuel pressure regulator, and fuel shutoff valve for fuel pressure regulator
and ECM (See page IN±29).
9 Check voltage between terminals VCNG3 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment.
(b) Start the engine.
CHECK:
Measure the voltage between terminals VCNG3 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V

A03030A09432
ON
FC
OFFON
± DIAGNOSTICSENGINE
DI±91
OK Check and replace ECM (See page IN±29).
NG
10 Check fuel shutoff valve for delivery pipe (See page SF±28).
NG Replace.
OK
Check for open in harness and connector between EFI main relay (Marking: EFI) and fuel shutoff
valve for delivery pipe, and fuel shutoff valve for delivery pipe and ECM (See page IN±29).
OBD II scan tool (excluding TOYOTA hand±held tester):
1 Check operation of fuel shutoff valve for fuel tank.
PREPARATION:
Remove the glove compartment (See Pub. No. RM654U, page
SF±64).
CHECK:
(a) Connect between terminal FC of the ECM connector and
body ground.
(b) Check for operating sound from the fuel shutoff valve for
fuel tank when the ignition switch turned ON.
OK:
There is operating sound from the fuel shutoff valve.
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±21).
NG
2 Check for ECM power source circuit (See page DI±116).
NG Repair or replace.
OK

DI±92
± DIAGNOSTICSENGINE
3 Check circuit opening relay (Marking: CIR OPN) (See Pub. No. RM654U, page
SF±41).
NG Replace circuit opening relay.
OK
4 Check voltage between terminal FC of ECM connector and body ground (See
page DI±86, step 4).
OK Go to step 5.
NG
Check for open in harness and connector between EFI main relay (Marking: EFI) and circuit open-
ing relay (Marking: CIR OPN), and circuit opening relay and ECM (See page IN±29).
5 Check fuel shutoff valve for fuel tank (See page SF±34).
NG Replace.
OK
6 Check for open in harness and connector between circuit opening relay (Mark-
ing: CIR OPN) and fuel shutoff valve for fuel tank, and fuel shutoff valve for fuel
tank and body ground (See page IN±29).
NG Repair or replace harness or connector.
OK

A09424
ON
VCNG2
(±)
(+) E01
A09425
ON
VCNG3
(±)(+) E01
± DIAGNOSTICSENGINE
DI±93
7 Check voltage between terminals VCNG2 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals VCNG2 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).
NG
8 Check fuel shutoff valve for fuel pressure regulator (See page SF±30).
NG Replace fuel shutoff valve with fuel pressure
regulator.
OK
Check for open in harness and connector between circuit opening relay (Marking: CIR OPN) and
fuel shutoff valve for fuel pressure regulator, and fuel shutoff valve for fuel pressure regulator
and ECM (See page IN±29).
9 Check voltage between terminals VCNG3 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment.
(b) Start the engine.
CHECK:
Measure the voltage between terminals VCNG3 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).

DI±94
± DIAGNOSTICSENGINE
NG
10 Check fuel shutoff valve for delivery pipe (See page SF±28).
NG Replace.
OK
Check for open in harness and connector between EFI main relay (Marking: EFI) and fuel shutoff
valve for delivery pipe, and fuel shutoff valve for delivery pipe and ECM (See page IN±29).

± DIAGNOSTICSENGINE
DI±95
DTC P1240 Fuel Fuel Shutoff Valve Circuit for Delivery
Pipe Malfunction
CIRCUIT DESCRIPTION
Refer to DTC P1190 on page DI±86.
DTC No.DTC Detecting ConditionTrouble Area
P1240Open in fuel shutoff valve circuit for fuel delivery pipe

Open or short in fuel shutoff valve circuit for fuel delivery pipe

Fuel shutoff valve for fuel delivery pipe

ECM
WIRING DIAGRAM
Refer to DTC P1190 on page DI±86.
INSPECTION PROCEDURE
TOYOTA hand±held tester:
1 Check fuel shutoff valve for delivery pipe.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand±held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand±held tester.
CHECK:
Check the operating sound of the fuel shutoff valve for delivery pipe when it is operated by the TOYOTA
hand±held tester.
HINT:
Use a sound scope or your finger to check the operating sound.
OK:
There is operating sound from the shutoff valve.
OK Go to step 5.
NG
2 Check for ECM power source circuit (See page DI±116).
NG Repair or replace.
DI64Y±01

A09425
ON
VCNG3
(±)(+) E01
DI±96
± DIAGNOSTICSENGINE
OK
3 Check voltage between terminals VCNG3 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
(b) Start the engine.
CHECK:
Measure the voltage between terminals VCNG3 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).
NG
4 Check fuel shutoff valve for delivery pipe (See page SF±28).
NG Replace.
OK
Check for open in harness and connector between EFI main relay (Marking: EFI) and fuel shutoff
valve for delivery pipe, and fuel shutoff valve for delivery pipe and ECM (See page IN±29).
OBD II scan tool (excluding TOYOTA hand±held tester):
1 Check for ECM power source circuit (See page DI±116).
NG Repair or replace.
OK

A09425
ON
VCNG3
(±)(+) E01
± DIAGNOSTICSENGINE
DI±97
2 Check voltage between terminals VCNG3 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
(b) Start the engine.
CHECK:
Measure the voltage between terminals VCNG3 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).
NG
3 Check fuel shutoff valve for delivery pipe (See page SF±28).
NG Replace.
OK
Check for open in harness and connector between EFI main relay (Marking: EFI) and fuel shutoff
valve for delivery pipe, and fuel shutoff valve for delivery pipe and ECM (See page IN±29).

DI±98
± DIAGNOSTICSENGINE
DTC P1245 Fuel Fuel Shutoff Valve Circuit for Pressure
Regulator Malfunction
CIRCUIT DESCRIPTION
Refer to DTC P1190 on page DI±86.
DTC No.DTC Detecting ConditionTrouble Area
P1245Open in fuel shutoff valve circuit for fuel pressure regulator

Open or short in fuel shutoff valve circuit for fuel pressure
regulator

Fuel shutoff valve for fuel pressure regulator

ECM
WIRING DIAGRAM
Refer to DTC P1190 on page DI±86.
INSPECTION PROCEDURE
TOYOTA hand±held tester:
1 Check fuel shutoff valve circuit for fuel pressure regulator.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand±held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand±held tester.
CHECK:
Check the operating sound of the fuel shutoff valve for the pressure regulator when it is operated by the TOY-
OTA hand±held tester.
HINT:
Use a sound scope or your finger to check the operating sound.
OK:
There is operating sound from the shutoff valve.
OK Go to step 4.
NG
2 Check for ECM power source circuit (See page DI±116).
NG Repair or replace.
OK
DI64Z±01

A09277
FC ON
(±) (+)
A09424
ON
VCNG2
(±)
(+) E01
± DIAGNOSTICSENGINE
DI±99
3 Check circuit opening relay (Marking: CIR OPN) (See Pub. No. RM654U, page
SF±41).
NG Replace circuit opening relay.
OK
4 Check voltage between terminal FC of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment.
(b) Disconnect the E4 connector from the ECM.
(c) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal FC of the ECM connec-
tor and body ground.
OK:
Voltage 9 ± 14 V
OK Go to step 5.
NG
Check for open in harness and connector between EFI main relay (Marking: EFI) and circuit open-
ing relay (Marking: CIR OPN), and circuit opening relay and ECM (See page IN±29).
5 Check voltage between terminals VCNG2 and E01 of ECM connectors.
PREPARATION:
(a) Remove the glove compartment.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals VCNG2 and E01 of the
ECM connectors.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).
NG