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Step
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.
8
5.
Observe "Desired Rail Pressure" and
"Actual Rail Pressure" displays again.
Does the actual common rail pressure
increase following the desired pressure?
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.
9
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?
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.
10
4.
Measure the resistance at the ECM
connector.
Was the resistance within range?
Repair or replace the faulty harness.
11
Is the action complete?
1.
Replace the ECM.
IMPORTANT:
If necessary (for the vehicle equipped with
12
idle stop function), input the number of
startups to the replacing ECM.
Is the action complete?
Action
Engine Control System 1A-201
Value(s)
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
Approx. 0 V
Go to Step 13
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
Verify repair and
—
go to Step 18
—
Verify repair and
go to Step 18
Yes
No
Go to Step 9
Go to Step 10
Go to Step 11
—
—
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