RM36D0EC _51 Engine / Hybrid System _087036 M20C-FKS ENGINE CONTROL _0418131 SFI SYSTEM J

M20C-FKS ENGINE CONTROL  SFI SYSTEM  Starter Signal Circuit  


DESCRIPTION

While the engine is being cranked, current flows from terminal ST1 of the ignition switch assembly*1 or terminal STAR of the certification ECU (smart key ECU assembly)*2 to terminal STA of the ECM (STA signal).

*1: w/o Smart Entry and Start System

*2: w/ Smart Entry and Start System

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting and reconnecting the battery.

Click here

HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART




PROCEDURE

1.CHECK WHETHER ENGINE CAN BE CRANKED
a.

Check if the engine can be cranked.


Result:
Result Proceed to
Engine cannot be cranked A
Engine can be cranked B



A

2.READ VALUE USING GTS (STARTER SW)

B

17.READ VALUE USING GTS (STARTER SW)
2.READ VALUE USING GTS (STARTER SW)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Data List / Starter SW.

Powertrain > Engine > Data List
Tester Display
Starter SW
50003 372 11

e.

Check the value displayed on the GTS when the ignition switch is turned to the ON and engine is cranked.


OK:
Condition GTS Display (Starter SW)
Ignition switch ON OFF
Engine started ON


Result:
Proceed to
OK
NG



OK

3.INSPECT ST NO. 1 RELAY

NG

9.CHECK STOP AND START SYSTEM
3.INSPECT ST NO. 1 RELAY
a.

Inspect the ST NO. 1 relay.

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>RELAY>INSPECTION


Result:
Proceed to
OK
NG



OK

4.INSPECT STARTER ASSEMBLY

NG

REPLACE ST NO. 1 RELAY

4.INSPECT STARTER ASSEMBLY
a.

Inspect the starter assembly.

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>STARTER>INSPECTION


Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - STARTER ASSEMBLY)

NG

REPLACE STARTER ASSEMBLY

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>STARTER>REMOVAL


5.CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - STARTER ASSEMBLY)
a.

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


b.

Disconnect the starter assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (ST NO. 1 relay) - C75-1 (ST) Always Below 1 Ω
3 (ST NO. 1 relay) - C76-1 (ZYV) Always Below 1 Ω
3 (ST NO. 1 relay) or C75-1 (ST) - Body ground and other terminals Always 10 kΩ or higher
3 (ST NO. 1 relay) or C76-1 (ZYV) - Body ground and other terminals Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - ECM)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - ECM)
a.

Remove the ST NO. 1 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
2 (ST NO. 2 relay) - A125-18 (STA) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (ST NO. 1 RELAY - BODY GROUND)
a.

Remove the ST NO. 1 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
1 (ST NO. 1 relay) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

8.CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 1 RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 1 RELAY)
A562511C01
0.094,0.063 0.406,0.219 0.313,0.156 10 false *1 2.125,1.188 2.438,1.344 0.313,0.156 10 false *2
*1 No. 1 Engine Room Relay Block and Junction Block Assembly
*2 ST NO. 1 Relay


a.

Remove the ST NO. 1 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
5 (ST NO. 1 relay) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - STARTER ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ST NO 1 RELAY)

9.CHECK STOP AND START SYSTEM
a.

Check the stop and start system.

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING


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



A

10.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ECM - ENGINE STOP AND START ECU - ST NO. 1 RELAY)

B

11.CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - ECM - ENGINE STOP AND START ECU)

C

REPAIR STOP AND START SYSTEM

10.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ECM - ENGINE STOP AND START ECU - ST NO. 1 RELAY)
a.

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


b.

Disconnect the ECM connector.


c.

Disconnect the engine stop and start ECU connector.


d.

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


e.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A126-10 (STAR) - A125-18 (STA) Always Below 1 Ω
A126-10 (STAR) - A34-21 (STA) Always Below 1 Ω
A126-10 (STAR), A125-18 (STA), 2 (ST NO. 1 relay) or A34-21 (STA) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

GO TO SMART ENTRY AND START SYSTEM

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (GTMC Made))>HOW TO PROCEED WITH TROUBLESHOOTING


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK HARNESS AND CONNECTOR (ST NO. 2 RELAY - ECM - ENGINE STOP AND START ECU)
a.

Disconnect the ECM connector.


b.

Disconnect the engine stop and start ECU connector.


c.

Remove the ST NO. 2 relay from the No. 1 engine room relay block and junction block assembly.


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 (ST NO. 2 relay) - A125-18 (STA) Always Below 1 Ω
3 (ST NO. 2 relay) - A34-21 (STA) Always Below 1 Ω
3 (ST NO. 2 relay), A125-18 (STA) or A34-21 (STA) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

12.INSPECT ST NO. 2 RELAY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.INSPECT ST NO. 2 RELAY
a.

Inspect the ST NO. 2 relay.

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>RELAY>INSPECTION


Result:
Proceed to
OK
NG



OK

13.CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 2 RELAY)

NG

REPLACE ST NO. 2 RELAY

13.CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST NO. 2 RELAY)
A566364C01
0.094,0.063 0.406,0.219 0.313,0.156 10 false *1 2.188,0.958 2.5,1.115 0.313,0.156 10 false *2
*1 No. 1 Engine Room Relay Block and Junction Block Assembly
*2 ST NO. 2 Relay


a.

Remove the ST NO. 2 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
5 (ST NO. 2 relay) - Body ground Engine started 11 to 14 V



Result:
Proceed to
OK
NG



OK

14.CHECK HARNESS AND CONNECTOR (ECM - ST NO. 2 RELAY)

NG

15.CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - ST NO. 2 RELAY)
14.CHECK HARNESS AND CONNECTOR (ECM - ST NO. 2 RELAY)
a.

Disconnect the ECM connector.


b.

Remove the ST NO. 2 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
C71-32 (NSR+) - 2 (ST NO. 2 relay) Always Below 1 Ω
C71-33 (NSR-) - 1 (ST NO. 2 relay) Always Below 1 Ω
C71-32 (NSR+) or 2 (ST NO. 2 relay) - Body ground and other terminals Always 10 kΩ or higher
C71-33 (NSR-) or 1 (ST NO. 2 relay) - Body ground and other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

CHECK SHIFT LEVER POSITION SENSOR CIRCUIT

for 2WD: Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>P070562

for AWD: Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>P070562


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.CHECK HARNESS AND CONNECTOR (IGNITION SWITCH ASSEMBLY - ST NO. 2 RELAY)
a.

Disconnect the ignition switch assembly connector.


b.

Remove the ST NO. 2 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
G28-5 (ST1) - 5 (ST NO. 2 relay) Always Below 1 Ω
G28-5 (ST1) or 5 (ST NO. 2 relay) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

16.INSPECT IGNITION SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

16.INSPECT IGNITION SWITCH ASSEMBLY
a.

Inspect the ignition switch assembly.

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>IGNITION SWITCH>INSPECTION


Result:
Proceed to
OK
NG



OK

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

NG

REPLACE IGNITION SWITCH ASSEMBLY

Click hereEngine / Hybrid System>M20C-FKS (STARTING)>IGNITION SWITCH>REMOVAL


17.READ VALUE USING GTS (STARTER SW)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Data List / Starter SW.

Powertrain > Engine > Data List
Tester Display
Starter SW
50003 372 11

e.

Check the value displayed on the GTS when the ignition switch is turned to the ON and the engine is cranked.


OK:
Condition GTS Display (Starter SW)
Ignition switch ON OFF
Engine started ON


Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>M20C-FKS (ENGINE CONTROL)>SFI SYSTEM>PROBLEM SYMPTOMS TABLE


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (ST NO. 1 RELAY - ECM)