1ZR-FE ENGINE CONTROL SFI SYSTEM 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
0.469,6.771 1.542,6.969
1.073,0.198
10
false
Battery
0.375,5.073 1.448,5.271
1.073,0.198
10
false
FL MAIN
0.969,3.052 2.042,3.25
1.073,0.198
10
false
AM2
1.427,3.125 2.5,3.323
1.073,0.198
10
false
E4
0.365,1.948 1.438,2.146
1.073,0.198
10
false
IG2
1.719,1.792 2.792,1.99
1.073,0.198
10
false
IG2
1.781,3.031 2.854,3.229
1.073,0.198
10
false
AM2
2.385,3.031 3.458,3.229
1.073,0.198
10
false
IG2
1.427,3.271 5.094,3.469
3.667,0.198
10
false
Ignition Switch Assembly
3.396,1.354 5.208,1.583
1.813,0.229
10
false
No. 1 Fuel Injector Assembly
3.448,2.594 5.26,2.823
1.813,0.229
10
false
No. 2 Fuel Injector Assembly
3.448,3.823 5.26,4.052
1.813,0.229
10
false
No. 3 Fuel Injector Assembly
3.458,5.094 5.271,5.323
1.813,0.229
10
false
No. 4 Fuel Injector Assembly
3.396,1.198 3.854,1.396
0.458,0.198
10
false
B10
3.448,2.448 3.906,2.646
0.458,0.198
10
false
B11
3.448,3.677 3.906,3.875
0.458,0.198
10
false
B12
3.458,4.938 3.917,5.135
0.458,0.198
10
false
B13
1.323,0.875 1.479,1.073
0.156,0.198
10
false
3
2.208,0.885 2.365,1.083
0.156,0.198
10
false
5
2.208,1.344 2.354,1.531
0.146,0.188
10
false
2
1.313,1.344 1.458,1.531
0.146,0.188
10
false
1
1.646,2.823 1.792,3.01
0.146,0.188
10
false
4
2.688,2.823 2.833,3.01
0.146,0.188
10
false
3
3.76,0.896 3.906,1.083
0.146,0.188
10
false
1
4.552,0.906 4.698,1.094
0.146,0.188
10
false
2
4.552,2.156 4.698,2.344
0.146,0.188
10
false
2
3.781,2.146 3.927,2.333
0.146,0.188
10
false
1
3.781,3.406 3.927,3.594
0.146,0.188
10
false
1
4.563,3.417 4.708,3.604
0.146,0.188
10
false
2
4.563,4.667 4.708,4.854
0.146,0.188
10
false
2
3.792,4.667 3.938,4.854
0.146,0.188
10
false
1
5.188,0.896 5.375,1.115
0.188,0.219
10
false
86
5.438,0.896 5.698,1.052
0.26,0.156
10
false
#10
5.427,2.156 5.698,2.344
0.271,0.188
10
false
#20
5.188,2.146 5.531,2.521
0.344,0.375
10
false
85
5.188,3.406 5.458,3.708
0.271,0.302
10
false
84
5.438,3.406 5.688,3.583
0.25,0.177
10
false
#30
5.438,4.656 5.698,4.844
0.26,0.188
10
false
#40
5.188,4.656 5.531,4.99
0.344,0.333
10
false
83
5.198,6.198 5.458,6.448
0.26,0.25
10
false
46
5.438,6.208 5.729,6.427
0.292,0.219
10
false
E01
5.438,6.719 5.719,6.938
0.281,0.219
10
false
E02
5.198,6.719 5.563,7.042
0.365,0.323
10
false
45
5.479,7.292 5.938,7.49
0.458,0.198
10
false
B56
5.823,7.292 6.281,7.49
0.458,0.198
10
false
ECM
CAUTION / NOTICE / HINT
- NOTICE:
-
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
1.CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
0.406,1.958 0.833,2.219
0.427,0.26
0.406,2.906 0.833,3.167
0.427,0.26
0.406,2.271 0.833,2.531
0.427,0.26
0.406,2.583 0.833,2.844
0.427,0.26
0.177,0.115 0.583,0.365
0.406,0.25
10
false
*a
0.5,2.01 0.792,2.177
0.292,0.167
10
false
B10
0.51,2.948 0.813,3.146
0.302,0.198
10
false
B13
0.5,2.323 0.938,2.656
0.438,0.333
10
false
B11
0.51,2.625 1.063,2.854
0.552,0.229
10
false
B12
| *a | Front view of wire harness connector
(to Fuel Injector Assembly) |
a.
Disconnect the fuel injector assembly connector.
b.
Turn the ignition switch to ON.
c.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition B10-1 - Body ground Ignition switch ON 11 to 14 V B11-1 - Body ground Ignition switch ON 11 to 14 V B12-1 - Body ground Ignition switch ON 11 to 14 V B13-1 - Body ground Ignition switch ON 11 to 14 V
- Result:
Proceed to OK NG
OK
2.INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)
NG
4.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - IG2 RELAY)
2.INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)
a.
Inspect the fuel injector assembly.
Click hereEngine / Hybrid System>1ZR-FE FUEL>FUEL INJECTOR>INSPECTION
- Result:
Proceed to OK NG
OK
3.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
NG
3.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
a.
Disconnect the fuel injector assembly connector.
b.
Disconnect the ECM connector.
c.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition B10-2 - B56-86 (#10) Always Below 1 Ω B11-2 - B56-85 (#20) Always Below 1 Ω B12-2 - B56-84 (#30) Always Below 1 Ω B13-2 - B56-83 (#40) Always Below 1 Ω B10-2 or B56-86 (#10) - Body ground Always 10 kΩ or higher B11-2 or B56-85 (#20) - Body ground Always 10 kΩ or higher B12-2 or B56-84 (#30) - Body ground Always 10 kΩ or higher B13-2 or B56-83 (#40) - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - IG2 RELAY)
a.
Disconnect the fuel injector assembly connector.
b.
Remove the IG2 relay from the engine room relay block and junction block assembly.
c.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition B10-1 - 5 (IG2 relay) Always Below 1 Ω B11-1 - 5 (IG2 relay) Always Below 1 Ω B12-1 - 5 (IG2 relay) Always Below 1 Ω B13-1 - 5 (IG2 relay) Always Below 1 Ω B10-1 or 5 (IG2 relay) - Body ground Always 10 kΩ or higher B11-1 or 5 (IG2 relay) - Body ground Always 10 kΩ or higher B12-1 or 5 (IG2 relay) - Body ground Always 10 kΩ or higher B13-1 or 5 (IG2 relay) - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
CHECK ECM POWER SOURCE CIRCUIT
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR