1999 TOYOTA CAMRY relay

A09277
FC ON
(±) (+)
± DIAGNOSTICSENGINE
DI±89
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 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.

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).

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).