RM35X0E _51 Engine / Hybrid System _078720 7GR-FKS ENGINE CONTROL _0381907 SFI SYSTEM J

7GR-FKS ENGINE CONTROL  SFI SYSTEM  ECM Power Source Circuit  


DESCRIPTION

When the ignition switch is turned to ON, the battery voltage is applied to the IGSW terminal of the ECM.

The output signal from the MREL terminal of the ECM causes a current to flow to the coil of the EFI MAIN relay, closing the contacts and supplying power to terminals +B and +B2 of the ECM.

WIRING DIAGRAM

A446200E01
0.542,4.563 1.615,4.76 1.073,0.198 10 false Battery 2.531,0.615 4.396,0.948 1.865,0.333 10 false Ignition Switch Assembly*2 2.281,2.365 3.219,2.604 0.938,0.24 10 false IG2-MAIN 2.302,3.49 3.094,3.844 0.792,0.354 10 false EFI-MAIN 3.063,2.854 4.135,3.052 1.073,0.198 10 false IG2 MAIN 3.083,4.031 4.208,4.24 1.125,0.208 10 false EFI MAIN 4.958,2.354 6.031,2.552 1.073,0.198 10 false IG2 NO. 1 6.417,5.104 6.896,5.365 0.479,0.26 10 false ECM 5.781,4.5 6.26,4.76 0.479,0.26 10 false E3 6.125,4.51 6.604,4.771 0.479,0.26 10 false E1 5.802,4.323 6.281,4.583 0.479,0.26 10 false 1 6.125,3.708 6.604,3.969 0.479,0.26 10 false MREL 5.781,3.792 6.26,4.052 0.479,0.26 10 false A1 5.802,3.625 6.281,3.885 0.479,0.26 10 false 25 5.823,2.031 6.302,2.292 0.479,0.26 10 false 7 6.125,2.104 6.604,2.365 0.479,0.26 10 false IGSW 5.792,2.219 6.271,2.479 0.479,0.26 10 false A1 5.771,2.979 6.25,3.24 0.479,0.26 10 false A1 5.792,3.354 6.271,3.615 0.479,0.26 10 false A1 5.833,2.802 6.313,3.063 0.479,0.26 10 false 3 5.833,3.198 6.313,3.458 0.479,0.26 10 false 4 6.115,2.99 6.594,3.25 0.479,0.26 10 false +B 6.115,3.354 6.594,3.615 0.479,0.26 10 false +B2 1.854,0.396 2.313,0.594 0.458,0.198 10 false AM2 2.552,0.458 2.865,0.656 0.313,0.198 10 false N28 4.094,2.031 4.25,2.229 0.156,0.198 10 false 1 4.115,2.406 4.271,2.604 0.156,0.198 10 false 2 4.083,3.198 4.563,3.406 0.479,0.208 10 false 10 4.125,3.635 4.552,3.927 0.427,0.292 10 false 8 1.458,3.625 1.938,3.885 0.479,0.26 10 false 4 1.448,2.021 1.604,2.219 0.156,0.198 10 false 1 2.125,4.583 5.646,4.781 3.521,0.198 10 false No. 1 Integration Relay 0.563,2.365 1.271,2.646 0.708,0.281 10 false FL MAIN 2.896,0.146 3.354,0.344 0.458,0.198 10 false AM2 3.521,0.146 3.979,0.344 0.458,0.198 10 false IG2 2.667,0.146 2.823,0.344 0.156,0.198 10 false 1 3.875,0.146 4.031,0.344 0.156,0.198 10 false 2 1.448,2.208 1.74,2.396 0.292,0.188 10 false A 1.406,3.802 1.698,3.99 0.292,0.188 10 false 1E 4.063,3.802 4.354,3.99 0.292,0.188 10 false 1E 4.073,2.604 4.365,2.792 0.292,0.188 10 false 1D 4.073,2.219 4.365,2.406 0.292,0.188 10 false 1D 4.073,3.365 4.365,3.552 0.292,0.188 10 false 1E 3.458,1.115 4.135,1.333 0.677,0.219 10 false IG1D 1.76,1.458 4.969,1.667 3.208,0.208 10 false Certification ECU (Smart Key ECU Assembly)*1 1.781,5.073 6.219,5.271 4.438,0.198 10 false *1: w/ Entry and Start System 1.781,5.396 6.365,5.594 4.583,0.198 10 false *2: w/o Entry and Start System 1.771,1.26 2.396,1.458 0.625,0.198 10 false N156 3.927,1 4.26,1.198 0.333,0.198 10 false 17

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.


PROCEDURE

1.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BATTERY)
A444313C01
0.646,2.688 0.906,2.938 0.26,0.25 0.365,0.229 0.677,0.427 0.313,0.198 10 false *1 0.729,2.729 0.885,2.927 0.156,0.198 10 false A
*1 No. 1 Engine Room Relay Block and Junction Block Assembly without No. 1 Integration Relay


a.

Remove the No. 1 integration relay from the No. 1 engine room relay block and junction block assembly.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
A-1 - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

2.INSPECT NO. 1 INTEGRATION RELAY (EFI MAIN RELAY AND IG2 MAIN RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.INSPECT NO. 1 INTEGRATION RELAY (EFI MAIN RELAY AND IG2 MAIN RELAY)
a.

Inspect the EFI MAIN relay.

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION


b.

Inspect the IG2 MAIN relay.

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>RELAY>ON-VEHICLE INSPECTION


Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)

NG

REPLACE NO. 1 INTEGRATION RELAY

3.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)
a.

Remove the No. 1 integration relay from the No. 1 engine room relay block and junction block assembly.


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
A1-25 (MREL) - 1E-8 Always Below 1 Ω
A1-3 (+B) - 1E-10 Always Below 1 Ω
A1-4 (+B2) - 1E-10 Always Below 1 Ω
A1-25 (MREL) or 1E-8 - Body ground and other terminals Always 10 kΩ or higher
A1-3 (+B) or 1E-10 - Body ground and other terminals Always 10 kΩ or higher
A1-4 (+B2) or 1E-10 - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BODY GROUND)
a.

Remove the No. 1 integration relay from the No. 1 engine room relay block and junction block assembly.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
1E-4 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
a.

Disconnect the ECM connector.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition
E3-1 (E1) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.INSPECT ECM (IGSW VOLTAGE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.INSPECT ECM (IGSW VOLTAGE)
a.
A216119C27
2.833,0.958 3.198,1.198 0.365,0.24 1.323,0.958 1.688,1.198 0.365,0.24 1.646,1.594 1.323,2.427 true 2.844,1.583 2.552,2.417 true 0.167,0.167 0.417,0.333 0.25,0.167 10 false *a 2.927,1 3.24,1.281 0.313,0.281 10 false A1 1.417,0.99 1.906,1.302 0.49,0.313 10 false E3 1.188,2.458 1.542,2.708 0.354,0.25 10 false E1 2.406,2.458 2.917,2.688 0.51,0.229 10 false IGSW
*a Component with harness connected
(to ECM)


Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
A1-7 (IGSW) - E3-1 (E1) Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ECM>REMOVAL


NG

7.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)
7.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ECM)
a.

Remove the No. 1 integration relay from the No. 1 engine room relay block and junction block assembly.


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
1D-1 - A1-7 (IGSW) Always Below 1 Ω
1D-1 or A1-7 (IGSW) - Body ground and other terminals Always 10 kΩ or higher



Result:
Result Proceed to
OK (w/ Entry and Start System) A
OK (w/o Entry and Start System) B
NG C



A

8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INTEGRATION RELAY)

B

9.INSPECT IGNITION SWITCH ASSEMBLY

C

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INTEGRATION RELAY)
a.

Remove the No. 1 integration relay from the No. 1 engine room relay block and junction block assembly.


b.

Disconnect the certification ECU (smart key ECU assembly) connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
N156-17 (IG1D) - 1D-2 Always Below 1 Ω
N156-17 (IG1D) or 1D-2 - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

GO TO ENTRY AND START SYSTEM

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ENTRY AND START SYSTEM (for Start Function)>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.INSPECT IGNITION SWITCH ASSEMBLY
a.

Inspect the ignition switch assembly.

Click hereEngine / Hybrid System>7GR-FKS (STARTING)>IGNITION SWITCH>INSPECTION


Result:
Proceed to
OK
NG



OK

10.CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - NO. 1 INTEGRATION RELAY)

NG

REPLACE IGNITION SWITCH ASSEMBLY

Click hereEngine / Hybrid System>7GR-FKS (STARTING)>IGNITION SWITCH>REMOVAL


10.CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - NO. 1 INTEGRATION RELAY)
a.

Disconnect the ignition switch assembly connector.


b.

Remove the No. 1 integration relay from the No. 1 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
N28-2 (IG2) - 1D-2 Always Below 1 Ω
N28-2 (IG2) or 1D-2 - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR