SFI SYSTEM Starter Signal Circuit

DESCRIPTION

w/o Entry and Start System

• While the engine is being cranked, current flows from terminal ST1 of the ignition switch assembly to the park/neutral position switch assembly and also flows to terminal STA of the ECM (STA Signal).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

   4. Enter the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.

   5. Read the value.

      OK
      Ignition Switch Position Starter Signal ON OFF START ON

   
   

   OK

   PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

2. CHECK ST RELAY (POWER SOURCE)

   
   
   1. 

      Text in Illustration

      *1	Engine Room Main Relay Block
      *2	ST Relay Holder

      Remove the ST relay from the engine room main relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition ST relay terminal 2 - Body ground Engine cranking 11 to 14 V

      Tech Tips

      The engine does not crank because the relay is not installed.

   3. Reinstall the ST relay.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY) Click here

   OK

3. INSPECT ST RELAY

   
   

   1. Inspect the ST relay Click here.

   
   

   NG

   REPLACE ST RELAY

   OK

4. CHECK HARNESS AND CONNECTOR (ST RELAY - BODY GROUND)

   
   

   1. Remove the ST relay from the engine room main relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition ST relay terminal 1 - Body ground Always Below 1 Ω

   3. Reinstall the ST relay.

   
   

   OK

   REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - BODY GROUND)

5. CHECK HARNESS AND CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

   
   

   1. Remove the ST relay from the engine room main relay block.

   2. Disconnect the park/neutral position switch assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition ST relay terminal 2 - B69-9 (L) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition ST relay terminal 2 or B69-9 (L) - Body ground Always 10 kΩ or higher

   4. Reinstall the ST relay.

   5. Reconnect the park/neutral position switch assembly connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (ST RELAY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

   OK

6. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

   
   

   1. Inspect the park/neutral position switch assembly Click here.

   
   

   NG

   REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY Click here

   OK

7. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - IGNITION SWITCH)

   
   

   1. Disconnect the park/neutral position switch assembly connector.

   2. Disconnect the ignition switch assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition B69-4 (B) - F13-7 (ST2) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition B69-4 (B) or F13-7 (ST2) - Body ground Always 10 kΩ or higher

   4. Reconnect the park/neutral position switch assembly connector.

   5. Reconnect the ignition switch assembly connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH - IGNITION SWITCH)

   OK

8. INSPECT IGNITION SWITCH ASSEMBLY

   
   

   1. Inspect the ignition switch assembly Click here.

   
   

   OK

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

   NG

   REPLACE IGNITION SWITCH ASSEMBLY Click here