СИСТЕМА ECD > ECM Power Source Circuit

для подготовки Нажмите здесь


DESCRIPTION

When the ignition switch is turned to ON, the battery voltage is applied to terminal IGSW of the ECM. The ECM "MREL" output signal causes current to flow to the EFI relay coil, closing the contacts of the EFI relay and supplying power to terminal +B of the ECM.

WIRING DIAGRAM


A0094JGE03


INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK ECM (+B VOLTAGE)
A009AF3E96

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G61-12 (+B) - C101-14 (E1)
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)



NG
Перейдите к шагу 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Нажмите здесь)  

2.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
A00980UE13

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C101-14 (E1) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK ECM (IGSW VOLTAGE)
A009AF3E97

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G61-14 (IGSW) - C101-14 (E1)
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)



NG
Перейдите к шагу 7
OK


4.CHECK ECM (MREL VOLTAGE)
A009AF3E98

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G61-3 (MREL) - C101-14 (E1)
    		Ignition switch ON
    		11 to 14 V

    Text in Illustration 
    *a
    		Component with harness connected
    (ECM)



NG
REPLACE ECM (Нажмите здесь)
OK


5.CHECK NO. 1 INTEGRATION RELAY (EFI)
A009908E20

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1B-4 - Body ground
    		Ignition switch ON
    		10 to 14 V

    Text in Illustration 
    *a
    		Rear view of wire harness connector
    (to No. 1 Integration Relay)

  1. Reconnect the No. 1 integration relay (EFI) connector.



NG
REPLACE NO. 1 INTEGRATION RELAY (EFI)
OK


6.CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY (EFI) - ECM AND BODY GROUND)

  1. Disconnect the No. 1 integration relay (EFI) connector from the engine room junction block.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    1B-2 - G61-3 (MREL)
    		Always
    		Below 1 Ω
    1B-4 - G61-12 (+B)
    		Always
    		Below 1 Ω
    1B-3 - Body ground
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    1B-2 or G61-3 (MREL) - Body ground
    		Always
    		10 kΩ or higher
    1B-4 or G61-12 (+B) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the No. 1 integration relay (EFI) connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (TERMINAL +B OF ECM - BATTERY) 

7.INSPECT IGNITION SWITCH ASSEMBLY

  1. Inspect the ignition switch assembly (See page Нажмите здесь).



NG
REPLACE IGNITION SWITCH ASSEMBLY (Нажмите здесь)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION SWITCH, IGNITION SWITCH - ECM)