DESCRIPTION
The ECM constantly generates 5 V of power from the battery voltage supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit.
When the VC circuit is short-circuited, the microprocessor in the ECM and sensors that are supplied with power through the VC circuit are deactivated because the power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions.
Under normal conditions, the MIL is illuminated when the ignition switch is turned to ON. The MIL turns off when the engine is started.
WIRING DIAGRAM
*a | Diesel Throttle Body Assembly |
*b | Electric EGR Control Valve Assembly |
*c | Accelerator Pedal Sensor Assembly |
*d | Camshaft Position Sensor (w/ Stop and Start System) |
CAUTION / NOTICE / HINT
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
PROCEDURE
CHECK MIL
Check that the Malfunction Indicator Lamp (MIL) illuminates when turning the ignition switch to ON.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click hereНажмите здесь |
A |
CHECK COMMUNICATION BETWEEN GTS AND ECM
Connect the GTS to the DLC3.
Turn the ignition switch to ON and GTS on.
Check the communication between the GTS and ECM.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
GO TO MIL CIRCUIT Click here Нажмите здесь |
A |
CHECK MIL (THROTTLE POSITION SENSOR)
Disconnect the diesel throttle body assembly connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE DIESEL THROTTLE BODY ASSEMBLY Click hereНажмите здесь |
A |
CHECK MIL (ELECTRIC EGR CONTROL VALVE ASSEMBLY)
Disconnect the electric EGR control valve assembly connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY Click hereНажмите здесь |
A |
CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY)
Disconnect the accelerator pedal sensor assembly connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Click hereНажмите здесь |
A |
CHECK MIL (DIESEL TURBO PRESSURE SENSOR)
Disconnect the diesel turbo pressure sensor connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE DIESEL TURBO PRESSURE SENSOR Click hereНажмите здесь |
A |
CHECK MIL (NOZZLE VANE POSITION SENSOR (TURBOCHARGER SUB-ASSEMBLY)
Disconnect the nozzle vane position sensor (turbocharger sub-assembly) connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE TURBOCHARGER SUB-ASSEMBLY (NOZZLE VANE POSITION SENSOR) Click hereНажмите здесь |
A |
CHECK MIL (DIFFERENTIAL PRESSURE SENSOR)
Disconnect the differential pressure sensor connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE DIFFERENTIAL PRESSURE SENSOR Click here Нажмите здесь |
A |
CHECK MIL (OIL PRESSURE SENDER GAUGE ASSEMBLY)
Disconnect the oil pressure sender gauge assembly connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE OIL PRESSURE SENDER GAUGE ASSEMBLY Click hereНажмите здесь |
A |
CHECK MIL (FUEL PRESSURE SENSOR (COMMON RAIL ASSEMBLY))
Disconnect the fuel pressure sensor (common rail assembly) connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B | Нажмите здесь |
GO TO STEP 12 |
C |
REPLACE COMMON RAIL ASSEMBLY (FUEL PRESSURE SENSOR) Click hereНажмите здесь |
A |
CHECK MIL (CAMSHAFT POSITION SENSOR)
Disconnect the camshaft position sensor connector.
Turn the ignition switch to ON.
Check the MIL.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE CAMSHAFT POSITION SENSOR Click hereНажмите здесь |
A |
CHECK HARNESS AND CONNECTOR (VC CIRCUIT)
Disconnect the diesel throttle body assembly connector.
Disconnect the electric EGR control valve assembly connector.
Disconnect the accelerator pedal sensor assembly connector.
Disconnect the diesel turbo pressure sensor connector.
Disconnect the nozzle vane position sensor (turbocharger sub-assembly).
Disconnect the differential pressure sensor connector.
Disconnect the fuel pressure sensor connector (common rail assembly).
Disconnect the camshaft position sensor connector (w/ stop and start system).
Disconnect the oil pressure sender gauge assembly connector.
Disconnect the ECM connector.
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 |