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1A-142 Engine Control System
Step
Check the EGR valve position sensor circuit
harness for open wiring or short.
1.
Starter switch "OFF".
2.
Disconnect the ECM.
3.
Disconnect the EGR valve connector.
4.
Jumper the EGR vale connector pin and
measure the resistance at the ECM
connector.
13
Was the resistance within range?
Repair or replace the faulty harness.
14
Is the action complete?
Check the EGR valve position sensor.
1.
At the EGR valve connector pins,
measure the resistance.
Was the resistance within range?
15
Replace the EGR valve (EGR valve position
sensor).
16
Is the action complete?
Review the DTC.
1.
Certainly connect the EGR valve and
ECM connectors.
17
2.
Using Tech 2, clear the DTC.
3.
Perform test run and review the DTC.
Is DTC44 detected?
1.
Replace the ECM.
IMPORTANT:
If necessary (for the vehicle equipped with
18
idle stop function), input the number of
startups to the replacing ECM.
Is the action complete?
Action
Value(s)
Pins 63-64
(jumpered:
pins 1-2): 0 Ω
(not jumpered):
∞ Ω
Pins 64-68
(jumpered:
pins 2-3): 0 Ω
(not jumpered):
∞ Ω
Pins 63-68
(jumpered:
pins 1-3): 0 Ω
(not jumpered):
∞ Ω
Pins 63/64/
68-ground
(not jumpered):
∞ Ω
Go to Step 15
Verify repair and
—
go to Step 19
[Reference]
Pins 1-2:
Approx.
1.4~2 kΩ
Pins 2-3:
Approx.
6~8 Ω
Pins 1-3:
Approx.
5~7 kΩ
Pins 1/2/3-4/
5: ∞ Ω
Go to Step 17
—
Verify repair and
go to Step 19
—
Go to Step 18
—
Verify repair and
go to Step 19
Yes
No
Go to Step 14
Go to Step 16
Refer to
Diagnostic Aids
—
—
—
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