SFI SYSTEM > Starter Signal Circuit |
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DESCRIPTION
While the engine is being cranked, current flows from terminal STAR of the certification ECU (smart key ECU assembly) to the park/neutral position switch assembly and to terminal STA of the ECM (STA signal).WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK WHETHER ENGINE CAN BE CRANKED |
Check if the engine can be cranked.
Result Result Proceed to Engine cannot be cranked A Engine can be cranked B
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A | |
2.READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) |
Connect the intelligent tester to DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / Starter Signal.
Check the value displayed on the tester when the engine switch is turned to the on (IG) and the engine is started.
OK Switch Condition Tester Display (Starter Signal) Engine switch on (IG) Close (Off) Engine started Open (On)
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OK | |
3.INSPECT RELAY (ST RELAY) |
Inspect the ST relay (Click here).
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OK | |
4.INSPECT STARTER ASSEMBLY |
Inspect the starter assembly (Click here).
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OK | |
5.CHECK HARNESS AND CONNECTOR (ST RELAY - STARTER ASSEMBLY) |
Remove the ST relay from the engine room relay block and 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 3 (ST relay) - E9-1 Always Below 1 Ω 3 (ST relay) or E9-1 - Body ground Always 10 kΩ or higher
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OK | |
6.CHECK HARNESS AND CONNECTOR (BATTERY - STARTER ASSEMBLY) |
Disconnect the starter assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition F2-1 - Body ground Always 11 to 14 V
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OK | |
7.CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND) |
Remove the ST relay from the engine room relay block and junction block assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 1 (ST relay) - Body ground Always Below 1 Ω
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OK | |
8.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ST RELAY) |
Remove the ST relay from the engine room relay block and junction block assembly.
Disconnect the park/neutral position switch assembly connector.
Disconnect the certification ECU (smart key ECU assembly) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E85-9 (L) - 2 (ST relay) Always Below 1 Ω A43-7 (STA) - 2 (ST relay) Always Below 1 Ω
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OK | |
9.CHECK HARNESS AND CONNECTOR (BATTERY - ST RELAY) |
Remove the ST relay from the engine room relay block and junction block assembly.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition 5 (ST relay) - Body ground Always 11 to 14 V
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OK | ||
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10.READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL) |
Connect the intelligent tester to DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / All Data / Starter Signal.
Check the value displayed on the tester when the engine switch is turned to the on (IG) and the engine is started.
OK Switch Condition Tester Display (Starter Signal) Engine switch on (IG) OFF Engine started ON
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OK | ||
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11.INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY |
Inspect the park/neutral position switch assembly (Click here).
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OK | |
12.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM) |
Disconnect the park/neutral position switch assembly connector.
Disconnect the certification ECU (smart key ECU assembly) connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A43-5 (STAR) - E85-4 (B) Always Below 1 Ω A43-5 (STAR) - E26-65 (NSW) Always Below 1 Ω A43-5 (STAR) or E85-4 (B) or E26-65 (NSW) - Body ground Always 10 kΩ or higher
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OK | |
13.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - ECM - ST RELAY - CERTIFICATION ECU) |
Disconnect the park/neutral position switch assembly connector.
Disconnect the ECM connector.
Remove the ST relay from the engine room relay block and junction block assembly.
Disconnect the certification ECU (smart key ECU assembly) connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E85-9 (L) - A25-9 (STA) Always Below 1 Ω E85-9 (L) or A25-9 (STA) or 2 (ST relay) or A43-7 (STA) - Body ground Always 10 kΩ or higher
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OK | ||
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