Toyota Sequoia (2005). Manual — part 179
B17411
FC (+)
E4
–
DIAGNOSTICS
ENGINE
DI–511
705
6
Check for open in harness and connector between circuit opening relay and fuel
pump, and fuel pump and body ground (See page
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.
CHECK:
Measure the voltage between terminal FC of the ECM connec-
tor and body ground.
OK:
Voltage: 9 to 14 V
NG
Check for open in harness and connector be-
tween battery and FC terminal of ECM (See page
OK
Proceed to problem symptoms table
(See page
).
8
Check fuel pump resistor (See page
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
A21044
Engine
Room
R/B
R–B
7
ECM
W
E4
11
C8
C10
1
2
B
R–L
15
2
2
Battery
7
6
I18
Ignition
Switch
4
1D
1G
6
B–R
R
GAUGE
Combination
Meter
Malfunction
Indicator
Lamp
AM2
IG2
AM2
DI–512
–
DIAGNOSTICS
ENGINE
706
MIL Circuit
CIRCUIT DESCRIPTION
If the ECM detects a trouble, the MIL lights up. At this time, the ECM records a DTC in the memory.
WIRING DIAGRAM
DICFG–02
B17418
W
E5
–
DIAGNOSTICS
ENGINE
DI–513
707
INSPECTION PROCEDURE
HINT:
Troubleshoot each trouble symptom in accordance with the chart below.
MIL remains on
Start inspection from step 1
MIL does not light up
Start inspection from step 3
1
Clear DTC.
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)
Read the DTC (See page
).
(d)
).
CHECK:
(a)
Check that MIL does not light up.
OK:
Standard: MIL does not light up
OK
Repair circuit indicated by output code
(See page
).
NG
2
Check Harness and connector (Check for short in wire harness).
PREPARATION:
(a)
Disconnect the E4 ECM connector.
(b)
Turn the ignition switch ON.
CHECK:
(a)
Check that MIL does not light up.
OK:
Standard: MIL does not light up
OK
Replace ECM (See page
NG
Check and repair harness and connector be-
tween combination meter and ECM.
DI–514
–
DIAGNOSTICS
ENGINE
708
3
Check that MIL lights up.
CHECK:
Check that MIL lights up when turning the ignition switch ON.
OK:
Standard: MIL lights up
OK
System OK.
NG
4
Inspect combination meter assy (MIL circuit).
See the combination meter troubleshooting on page
NG
Repair or replace bulb or combination meter as-
sembly.
OK
Check and repair harness and connector be-
tween combination meter and ECM.
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