| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM00000330200AX |
| Title: 3UR-FE ENGINE CONTROL: SFI SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Fuel Injector Circuit |
DESCRIPTION
The fuel injectors are located on the intake manifold. They inject fuel into the cylinders based on the signals from the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
INSPECT INJECTOR ASSEMBLY (POWER SOURCE) |
(a) Disconnect the injector connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Cylinder |
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|---|
|
No. 1 |
d1-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 2 |
c1-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 3 |
d2-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 4 |
c2-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 5 |
d3-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 6 |
c3-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 7 |
d4-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
No. 8 |
c4-2 - Ground |
Ignition switch ON |
11 to 14 V |
|
|
2. |
INSPECT INJECTOR ASSEMBLY |
(a) Inspect the injector
.
|
|
3. |
CHECK HARNESS AND CONNECTOR (INJECTOR ASSEMBLY - ECM) |
(a) Disconnect the injector connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Cylinder |
Tester Connection |
Condition |
Specified Condition |
|---|---|---|---|
|
No. 1 |
d1-1 - Body ground |
Always |
10 kΩ or higher |
|
d1-1 - D56-86 (#10) |
Always |
Below 1 Ω |
|
|
No. 2 |
c1-1 - Ground |
Always |
10 kΩ or higher |
|
c1-1 - D56-109 (#20) |
Always |
Below 1 Ω |
|
|
No. 3 |
d2-1 - Ground |
Always |
10 kΩ or higher |
|
d2-1 - D56-85 (#30) |
Always |
Below 1 Ω |
|
|
No. 4 |
c2-1 - Ground |
Always |
10 kΩ or higher |
|
c2-1 - D56-108 (#40) |
Always |
Below 1 Ω |
|
|
No. 5 |
d3-1 - Ground |
Always |
10 kΩ or higher |
|
d3-1 - D56-84 (#50) |
Always |
Below 1 Ω |
|
|
No. 6 |
c3-1 - Ground |
Always |
10 kΩ or higher |
|
c3-1 - D56-107 (#60) |
Always |
Below 1 Ω |
|
|
No. 7 |
d4-1 - Ground |
Always |
10 kΩ or higher |
|
d4-1 - D56-83 (#70) |
Always |
Below 1 Ω |
|
|
No. 8 |
c4-1 - Ground |
Always |
10 kΩ or higher |
|
c4-1 - D56-106 (#80) |
Always |
Below 1 Ω |
|
|
4. |
INSPECT FUSES (INJ, IG2 MAIN) |
(a) Remove the INJ fuse and IG2 MAIN fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
INJ fuse |
Always |
Below 1 Ω |
|
IG2 fuse |
Always |
Below 1 Ω |
|
|
5. |
INSPECT INTEGRATION RELAY (IG2) |
(a) Inspect the integration relay
.
|
|
|