DESCRIPTION
When the ignition switch is turned to ON, battery voltage is applied to IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the EFI-MAIN relay and supplying power to either terminal +B or +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 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 | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK TERMINAL VOLTAGE (IGSW TERMINAL VOLTAGE)
Disconnect the ECM connector.
*a |
Front view of wire harness connector (to ECM) |
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
INSPECT EFI-MAIN RELAY
Inspect the EFI-MAIN relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE EFI-MAIN RELAY |
OK |
CHECK HARNESS AND CONNECTOR (ECM - EFI-MAIN RELAY)
Disconnect the ECM connector.
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 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 (EFI-MAIN RELAY - BATTERY) |
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 | |||
---|---|---|---|
|
OK |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
INSPECT IG2 RELAY
Inspect the IG2 relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE IG2 RELAY |
OK |
CHECK HARNESS AND CONNECTOR (ECM - IG2 RELAY)
Disconnect the ECM connector.
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 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 |
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 RELAY - BATTERY) |
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 | ||||||||
---|---|---|---|---|---|---|---|---|
|
B | Нажмите здесь |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
A |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - IG2 RELAY)
Disconnect the certification ECU (smart key ECU assembly) connector.
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 | |||
---|---|---|---|
|
OK |
GO TO ENTRY AND START SYSTEM Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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 HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - IG2 RELAY)
Disconnect the ignition or starter switch assembly connector.
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 | |||
---|---|---|---|
|
OK |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - BATTERY) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |