Engine Control System 1A-201
8
Check the common rail pressure.
1.
Install Tech 2.
2.
Starter switch "ON".
3.
Observe "Desired Rail Pressure" and
"Actual Rail Pressure" displays.
4.
Start the engine. Run the engine at idle
for warm-up.
5.
Observe "Desired Rail Pressure" and
"Actual Rail Pressure" displays again.
Does the actual common rail pressure
increase following the desired pressure?
Engine off:
Desired
pressure -
0 MPa
Actual
pressure -
0 MPa
Idling:
Desired
pressure -
approx.
40 MPa
Actual
pressure -
approx.
40 MPa
Go to Step 14
Go to Step 9
9
Check the ECM for fault.
1.
Starter switch "ON", engine "OFF".
2.
Disconnect the common rail pressure
sensor connector.
3.
On Tech 2, observe the "Common Rail
Pressure Sensor" display for output
voltage.
CAUTION:
After the common rail pressure sensor is
disconnected, DTC245 is set. Be sure to
clear this DTC245 upon completion of this
Step 9.
Was the voltage within range?
Approx. 0 V
Go to Step 13
Go to Step 10
10
Check the common rail pressure sensor
circuit harness for open wiring or short.
1.
Starter switch "OFF".
2.
Disconnect the ECM.
3.
Disconnect the common rail pressure
sensor connector.
4.
Measure the resistance at the ECM
connector.
Was the resistance within range?
Pins 63-66/
67:
∞ Ω
Pins 66/67-
64:
∞ Ω
Pins 63-64:
∞
Ω
Pins 67-66:
0
Ω
Pins 26-63/
67/66/64:
∞
Ω
Pins 63/67/
66/64/26-
ground:
∞
Ω
Go to Step 12
Go to Step 11
11
Repair or replace the faulty harness.
Is the action complete?
—
Verify repair and
go to Step 18
—
12
1.
Replace the ECM.
IMPORTANT:
If necessary (for the vehicle equipped with
idle stop function), input the number of
startups to the replacing ECM.
Is the action complete?
—
Verify repair and
go to Step 18
—
Step
Action
Value(s)
Yes
No
Summary of Contents for 4HL1
Page 267: ...No LG4HL WE 0229DOM...
