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DI-937
DIAGNOSTICS - ENGINE (2UZ-FE)
DIDSI-01
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
Refer to DTC P0230 on page DI-600.
WIRING DIAGRAM
Refer to DTC P0230 on page DI-600.
INSPECTION PROCEDURE
1 Check fuel pump operation (See page SF-7).
OK Go to step 8.
NG
2 Connect hand-held tester, and check operation of fuel pump relay.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Enter the following menu: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP SPD.
CHECK:
Check the operation of the fuel pump relay when it is switched ON and OFF by the hand-held tester.
OK:
Operating noise can be heard from the relay.
OK Go to step 4.
NG
DI-938
DIAGNOSTICS - ENGINE (2UZ-FE)
3 Check operation of fuel pump relay.
PREPARATION:
Remove the fuel pump relay from the engine room R/B.
CHECK:
Inspect the fuel pump relay.
OK:
Terminal No. Condition Specified Condition
Apply B+ between
3-4 10 K or higher
terminals 1 and 2
A21024 3-4 Always Below 1
3-5 Always 10 K or higher
Apply B+ between
3-5 Below 1
terminals 1 and 2
NG Replace fuel pump relay.
OK
4 Check fuel pump (See page SF-15).
NG Repair or replace fuel pump.
OK
5 Check circuit opening relay).
PREPARATION:
Remove the C/OPN relay from the engine room J/B.
CHECK:
Inspect the C/OPN relay.
OK:
Standard:
Terminal No. Condition Specified Condition
3-5 Always 10 K or higher
A19288
Apply B+ between
3-5 Below 1
terminals 1 and 2
NG Replace circuit opening relay.
OK
DI-939
DIAGNOSTICS - ENGINE (2UZ-FE)
6 Check for open in harness and connector between circuit opening relay and fuel
pump, and fuel pump and body ground (See page IN-30).
NG Repair or replace harness or connector.
OK
7 Check voltage between terminal FC and E1 of ECM connector.
PREPARATION:
Turn the ignition switch ON.
E3 CHECK:
Measure the voltage between terminal FC of the ECM connec-
tor and body ground.
OK:
Voltage: 9 to 14 V
FC (+)
B17411 NG Check for open in harness and connector be-
tween battery and FC terminal of ECM (See page
IN-30).
OK
Proceed to problem symptoms table
(See page DI-452).
8 Check fuel pump resistor (See page SF-63).
NG Replace fuel pump resistor.
OK
Check for open in harness and connector between circuit opening relay and fuel pump resistor,
and fuel pump resistor and fuel pump (See page IN-30).
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