M20C-FKS, M20D-FKS ENGINE CONTROL SFI SYSTEM Starter Signal Circuit
DESCRIPTION
While the engine is being cranked, current flows from terminal STAR of the certification ECU (smart key ECU assembly) to terminal STA of the ECM (STA signal).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
Inspect the fuses for circuits related to this system before performing the following procedure.
·When disconnecting and reconnecting the battery.
- HINT:
-
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
PROCEDURE
Check if the engine can be cranked.
- Result:
Result Proceed to Engine cannot be cranked A Engine can be cranked B
A
B
Check the value displayed on the GTS when the ignition switch is turned to the ON and engine is cranked.
- Powertrain > Engine > Data List
-
Tester Display Starter SW - 50003 372 11
- OK:
Condition GTS Display (Starter SW) Ignition switch ON OFF Engine started ON
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the starter assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(C123,C122)Location & Routingewd_type=routing;type=c,c;code=C123,C122
Click Connector(C123)Engine Compartment>Engine Wire>Starter Assemblyewd_type=component;type=c;code=C123;pinno=1
Click Connector(C122)Engine Compartment>Engine Wire>Starter Assemblyewd_type=component;type=c;code=C122;pinno=1
3 (ST NO. 1 relay) - C123-1 (ST) Always Below 1 Ω 3 (ST NO. 1 relay) - C122-1 (ZYV) Always Below 1 Ω 3 (ST NO. 1 relay), C123-1 (ST) or C122-1 (ZYV) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(A109)Location & Routingewd_type=routing;type=c;code=A109
Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECMewd_type=component;type=c;code=A109;pinno=18
2 (ST NO. 1 relay) - A109-18 (STA) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the ECM connector.
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
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly |
| *2 | ST NO. 1 Relay |
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
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
NG
Disconnect the ECM connector.
Disconnect the certification ECU (smart key ECU assembly) connector.
Disconnect the engine stop and start ECU connector.
Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Click Location & Routing(A15,A109,A106)Location & Routingewd_type=routing;type=c,c,c;code=A15,A109,A106
Click Connector(A15)Instrument Panel>Engine Room Main Wire>Smart Key ECU Assemblyewd_type=component;type=c;code=A15;pinno=10
Click Connector(A109)Engine Compartment>Engine Room Main Wire / Transmission Wire>ECMewd_type=component;type=c;code=A109;pinno=18
Click Connector(A106)Instrument Panel>Engine Room Main Wire>Engine Stop and Start ECUewd_type=component;type=c;code=A106;pinno=21
A15-10(STAR) - A109-18(STA) Always Below 1 Ω A15-10(STAR) - A106-21(STA) Always Below 1 Ω A109-18 (STA), A106-21 (STA), A15-10 (STAR) or 2 (ST NO. 1 relay) - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
- Result:
Proceed to OK NG
OK
NG
Check the value displayed on the GTS when the ignition switch is turned to the ON and the engine is cranked.
- Powertrain > Engine > Data List
-
Tester Display Starter SW - 50003 372 11
- OK:
Condition GTS Display (Starter SW) Ignition switch ON OFF Engine started ON
- Result:
Proceed to OK NG
OK
NG