Starter Signal Circuit 1GR-FE

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

INSPECT STARTER RELAY (ST)

CHECK HARNESS AND CONNECTOR (ST RELAY - CLUTCH START SWITCH)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

INSPECT STARTER

INSPECT CLUTCH START SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

INSPECT IGNITION SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - IGNITION SWITCH)

SFI system - Starter Signal Circuit

Description

While the engine is being cranked, current flows from terminal ST1 of the ignition switch*1 or terminal STAR of the main body ECU*2 to the park/neutral position switch (for automatic transmission) or clutch start switch (for manual transmission) and also flows to terminal STA of the ECM (STA Signal).

Wiring diagram

Refer to DTC P0617.

Inspection 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 intelligent tester on.

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

5. Read values.

6. Check the result when the ignition switch is turned to ON and when the engine is started.

   OK:

   Condition	Display (Starter Signal)
   Ignition switch ON	OFF
   Engine is started	ON

NG	Go to step 6

OK

2.INSPECT STARTER RELAY (ST)

1. Inspect the starter relay (ST).

NG	REPLACE STARTER RELAY (ST)

OK

3.CHECK HARNESS AND CONNECTOR (ST RELAY - CLUTCH START SWITCH)

1. Disconnect the clutch start switch.

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

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 (1) - A49-2*1	Always	Below 1 ?
   ST relay (1) - e1-2*2	Always	Below 1 ?

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   ST relay (1) or A49-2*1 - Body ground	Always	10 k? or higher
   ST relay (1) or e1-2*2 - Body ground	Always	10 k? or higher

   *1: for LHD

   *2: for RHD

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.CHECK HARNESS AND CONNECTOR (POWER SOURCE)

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

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   ST relay (2) - ST relay (5)	Always	11 to 14 V

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY (ST) - BATTERY, BODY GROUND)

OK

5.INSPECT STARTER

1. Inspect the starter (for 1.4 kW Type) .

2. Inspect the starter (for 2.0 kW Type) .

Result

Result	Proceed to
OK	A
NG (for 1.4 kW Type)	B
NG (for 2.0 kW Type)	C

B	REPLACE STARTER
C	REPLACE STARTER

A
REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER - STARTER RELAY (ST), BATTERY)

6.INSPECT CLUTCH START SWITCH ASSEMBLY

1. Inspect the clutch start switch (for LHD) .

2. Inspect the clutch start switch (for RHD) .

   Result

   Result	Proceed to
   OK	A
   NG (for LHD)	B
   NG (for RHD)	C

B	REPLACE CLUTCH START SWITCH ASSEMBLY
C	REPLACE CLUTCH START SWITCH ASSEMBLY

A

7.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

1. Disconnect the clutch start switch connector.

2. Disconnect the ECM connector.

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

   Standard Resistance (Check for Open):

   for LHD

   Tester Connection	Condition	Specified Condition
   A49-2 - A38-48 (STA)	Always	Below 1 ?

   for RHD

   Tester Connection	Condition	Specified Condition
   e1-2 - A52-48 (STA)	Always	Below 1 ?

   Standard Resistance (Check for Short):

   for LHD

   Tester Connection	Condition	Specified Condition
   A49-2 or A38-48 (STA) - Body ground	Always	10 k? or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   e1-2 or A52-48 (STA) - Body ground	Always	10 k? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.CHECK IF VEHICLE IS EQUIPPED WITH ENTRY AND START SYSTEM

Result

Result	Proceed to
w/ Entry and Start System	A
w/o Entry and Start System	B

B	Go to step 11

A

9.REPLACE ECM

1. Replace the ECM .

NEXT

10.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

1. Check the starter operation.

   OK:

   Malfunction has been repaired successfully.

NG	GO TO ENTRY AND START SYSTEM (ENGINE DOES NOT START)

OK
END

11.INSPECT IGNITION SWITCH ASSEMBLY

1. Inspect the ignition switch assembly .

NG	REPLACE IGNITION SWITCH ASSEMBLY

OK

12.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - IGNITION SWITCH)

1. Disconnect the clutch start switch connector.

2. Disconnect the ignition switch connector.

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

   Standard Resistance (Check for Open):

   for LHD

   Tester Connection	Condition	Specified Condition
   A49-1 - E93-3 (ST1)	Always	Below 1 ?

   for RHD

   Tester Connection	Condition	Specified Condition
   e1-1 - E93-3 (ST1)	Always	Below 1 ?

   Standard Resistance (Check for Short):

   for LHD

   Tester Connection	Condition	Specified Condition
   A49-1 or E93-3 (ST1) - Body ground	Always	10 k? or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   e1-1 or E93-3 (ST1) - Body ground	Always	10 k? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

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