Ecd System (W/O Dpf) Cranking Holding Function Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CRANKING

READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

INSPECT STARTER RELAY (ST)

CHECK HARNESS AND CONNECTOR (PNP SWITCH - ST RELAY)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

INSPECT STARTER

INSPECT STARTER CUT RELAY (ST CUT)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)

INSPECT PARK/NEUTRAL POSITION SWITCH

CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Check the cranking of the engine.
   
   

   Result:

   
   

   Test Result	Proceed to
   Cranking possible and holding control operates	A
   Does not crank	B
   Cranking possible but holding control does not operate	C

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 / Data List / Starter Signal.
   

5. Read the values.
   

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

   OK:

   
   

   Ignition Switch Condition	Display (Starter Signal)
   ON	OFF
   Engine started	ON

1. Inspect the starter relay (ST) (Click here).
   

1. Disconnect the Park/Neutral Position (PNP) 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:

   Tester Connection	Condition	Specified Condition
   ST relay (2) - C24-5	Always	Below 1 Ω
   ST relay (2) or D24-5 - Body ground	Always	10 kΩ or higher

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 (1) - ST relay (5)	Always	11 to 14 V

1. Inspect the starter (Click here).
   
   

   Result:

   
   

   Test Result	Proceed to
   OK	A
   NG	B

1. Inspect the starter cut relay (ST CUT) (Click here).
   

1. Remove the starter cut relay (ST CUT) from the engine room relay block.
   

2. Disconnect the PNP switch connector.
   

3. Disconnect the ECM connector.
   

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

   Standard Resistance:

   for LHD

   Tester Connection	Condition	Specified Condition
   ST CUT relay (5) - C45-51 (STAR)	Always	Below 1 Ω
   ST CUT relay (3) - C24-4 (B)	Always	Below 1 Ω
   ST CUT relay (5) or C45-51 (STAR) - Body ground	Always	10 kΩ or higher
   ST CUT relay (3) or C24-4 (B) - Body ground	Always	10 kΩ or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   ST CUT relay (5) - C46-51 (STAR)	Always	Below 1 Ω
   ST CUT relay (3) - C24-4 (B)	Always	Below 1 Ω
   ST CUT relay (5) or C46-51 (STAR) - Body ground	Always	10 kΩ or higher
   ST CUT relay (3) or C24-4 (B) - Body ground	Always	10 kΩ or higher

1. Inspect the Park/Neutral Position (PNP) switch.
   

   1. Disconnect the PNP switch connector.
      

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

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      4 (B) - 5 (L)	Shift lever in P	Below 1 Ω
      	Shift lever in N	Below 1 Ω

1. Disconnect the PNP switch connector.
   

2. Disconnect the ECM connector.
   

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

   Standard Resistance:

   for LHD

   Tester Connection	Condition	Specified Condition
   C24-5 (L) - A38-48 (STA)	Always	Below 1 Ω
   C24-5 (L) or A38-48 (STA) - Body ground	Always	10 kΩ or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   C24-5 (L) - A52-48 (STA)	Always	Below 1 Ω
   C24-5 (L) or A52-48 (STA) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   NG	A
   OK	B

1. Disconnect the main body ECU connector.
   

2. Disconnect the ECM connector.
   

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

   Standard Resistance:

   for LHD

   Tester Connection	Condition	Specified Condition
   E4-4 (STSW) - A38-14 (STSW)	Always	Below 1 Ω
   E4-4 (STSW) or A38-14 (STSW) - Body ground	Always	10 kΩ or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   E4-4 (STSW) - A52-14 (STSW)	Always	Below 1 Ω
   E4-4 (STSW) or A52-14 (STSW) - Body ground	Always	10 kΩ or higher

1. Remove the starter cut relay (ST CUT) from the engine room relay block.
   

2. Disconnect the PNP switch connector.
   

3. Disconnect the ECM connector.
   

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

   Standard Resistance:

   for LHD

   Tester Connection	Condition	Specified Condition
   ST CUT relay (5) - C45-51 (STAR)	Always	Below 1 Ω
   ST CUT relay (3) - C24-4 (B)	Always	Below 1 Ω
   ST CUT relay (5) or C45-51 (STAR) - Body ground	Always	10 kΩ or higher
   ST CUT relay (3) or C24-4 (B) - Body ground	Always	10 kΩ or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   ST CUT relay (5) - C46-51 (STAR)	Always	Below 1 Ω
   ST CUT relay (3) - C24-4 (B)	Always	Below 1 Ω
   ST CUT relay (5) or C46-51 (STAR) - Body ground	Always	10 kΩ or higher
   ST CUT relay (3) or C24-4 (B) - Body ground	Always	10 kΩ or higher

1. Replace the ECM (Click here).
   

1. Check the starter operation.
   

   OK:

   Malfunction has been repaired successfully.