DESCRIPTION
The injector driver (EDU) drives the injector assemblies at high speeds with a high-voltage DC/DC converter. The ECM constantly monitors the injector driver (EDU) and stops the engine if an abnormal condition is detected.
CAUTION / NOTICE / HINT
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click hereНажмите здесь).
Inspect the fuses of circuits related to this system before performing the following procedure.
PROCEDURE
CHECK TERMINAL VOLTAGE (POWER SOURCE OF INJECTOR DRIVER (EDU))
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
OK |
REPLACE INJECTOR DRIVER (EDU) Click hereНажмите здесь |
NG |
CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER (EDU) - BODY GROUND)
Disconnect the injector driver (EDU) 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 EDU RELAY
Inspect the EDU relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE EDU RELAY |
OK |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF EDU RELAY)
Remove the EDU relay from the engine room relay block and junction block assembly.
*1 | Engine Room Relay Block and Junction Block Assembly |
*2 | EDU Relay |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - EDU RELAY) |
OK |
CHECK HARNESS AND CONNECTOR (INJECTOR DRIVER (EDU) - EDU RELAY)
Disconnect the injector driver (EDU) connector.
Remove the EDU 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 (ECM - EDU RELAY)
Disconnect the ECM connector.
Remove the EDU 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 (EDU RELAY - EFI MAIN NO. 2 RELAY)
Remove the EDU relay and EFI MAIN NO. 2 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 |
INSPECT EFI MAIN NO. 2 RELAY
Inspect the EFI MAIN NO. 2 relay.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE EFI MAIN NO. 2 RELAY |
OK |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF EFI MAIN NO. 2 RELAY)
Remove the EFI MAIN NO. 2 relay from the engine room relay block and junction block assembly.
*1 | Engine Room Relay Block and Junction Block Assembly |
*2 | EFI MAIN NO. 2 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 NO. 2 RELAY) |
OK |
CHECK HARNESS AND CONNECTOR (EFI MAIN NO. 2 - BODY GROUND)
Remove the EFI MAIN NO. 2 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 (ECM - EFI MAIN NO. 2 RELAY)
Disconnect the ECM connector.
Remove the EFI MAIN NO. 2 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 |
REPLACE ECM Click hereНажмите здесь |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |