1A-178 Engine Control System (4HK1)
10
1. Test the position sensor circuits (which ever
parameter did not indicate High at Step 6)
between the ECM (pins 93, 94 and 99 of E-12)
and the EGR valve (pins 2, 3 and 4 of E-15)
for the following conditions:
• An open circuit
• A short to ground
• A short to the low reference circuit
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 16 Go to Step 13
11
1. Inspect for an intermittent and for poor
connections at the harness connector of the
EGR valve (pins 1, 2, 3, 4 and 5 of E-15)
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 16 Go to Step 12
12
1. Test the solenoid circuits between the ECM
(pins 103, 110 and 111 of E-12) and the EGR
valve (pins 6, 7 and 8 of E-15) for a short to
the EGR position sensor circuit(s).
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 16 Go to Step 14
13
1. Turn OFF the ignition.
2. Disconnect the ECM harness connector.
3. Inspect for an intermittent and for poor
connections at the harness connector of the
ECM (pins 87, 93, 94, 99 and 101 of E-12).
4. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 16 Go to Step 15
14
Replace the EGR valve. Refer to EGR Valve and
EGR Cooler in Section 1F Emission Control.
Did you complete the replacement?
—
Go to Step 16
15
Important: Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 16
16
1. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
Notice: A history DTC will not clear. (Euro 4
specification)
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
5. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
—
Go to Step 3 Go to Step 17
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 178 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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