DESCRIPTION
When the ignition switch is turned to ON, battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the EFI-MAIN relay coil, closing the EFI-MAIN relay contacts and supplying power to terminals +B and +B2 of the ECM.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
CHECK TERMINAL VOLTAGE (POWER SOURCE OF IG2 RELAY)
Remove the IG2 relay from the engine room relay block and junction block assembly.
*1 | Engine Room Relay Block and Junction Block Assembly |
*2 | IG2 Relay |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IG2 RELAY) |
OK |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF EFI-MAIN RELAY)
Remove the EFI-MAIN relay from the engine room relay block and junction block assembly.
*1 | Engine Room Relay Block and Junction Block Assembly |
*2 | EFI-MAIN Relay |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EFI-MAIN RELAY) |
OK |
INSPECT RELAY (IG2 RELAY)
Inspect the IG2 relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE RELAY (IG2 RELAY) |
OK |
INSPECT RELAY (EFI-MAIN RELAY)
Inspect the EFI-MAIN relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE RELAY (EFI-MAIN RELAY) |
OK |
CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND)
Remove the IG2 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 | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (EFI-MAIN RELAY - BODY GROUND)
Remove the EFI-MAIN 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 | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (IG2 RELAY - ECM)
Remove the IG2 relay from the engine room relay block and junction block assembly.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (EFI-MAIN RELAY - ECM)
Remove the EFI-MAIN relay from the engine room relay block and junction block assembly.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B | Нажмите здесь |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
A |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - IG2 RELAY)
Remove the IG2 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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
GO TO ENTRY AND START SYSTEM Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
CHECK HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - IG2 RELAY)
Remove the IG2 relay from the engine room relay block and junction block assembly.
Disconnect the ignition or starter switch assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
Inspect the ignition or starter switch assembly.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click hereНажмите здесь |
OK |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION OR STARTER SWITCH ASSEMBLY)
Disconnect the ignition or starter switch assembly connector.
*a |
Front view of wire harness connector (to Ignition or Starter Switch Assembly) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IGNITION OR STARTER SWITCH ASSEMBLY) |