1A-246 Engine Control System (4HK1)
2
1. Inspect the following conditions:
• Misrouted or disconnected exhaust
differential pressure hoses or pipes
Important: There is installation
directionality in the exhaust differential
pressure hoses. Refer to Exhaust
System in Section 1G Engine Exhaust .
• Plugged, crushed or kinked exhaust
differential pressure hoses or pipes
• Physical damage of the exhaust
differential pressure sensor
• Any contamination or objects that block
the exhaust differential pressure sensor
port
• Skewed or slow exhaust differential
pressure sensor
• An exhaust system gasket that is missing
or damaged
• Exhaust gas leakage from the exhaust
pipe, gasket, DPD assembly, exhaust
temperature sensor(s) or exhaust
differential pressure hoses or pipes
• Modified exhaust system
• Skewed or slow exhaust temperature
sensors
• Restricted air cleaner element, restricted
or collapsed air tubing between the air
cleaner and the intake manifold
• Modified air induction system
• Any air induction leak
• Any contamination or objects that block
the mass air flow (MAF) sensor inlet
• Skewed or slow MAF sensor
2. Repair or replace as necessary.
3. Reconnect all previously disconnected
harness connector(s) or components.
Did you find and correct the condition?
—
Go to Step 5 Go to Step 3
3
1. Turn ON the ignition for 30 seconds. DO NOT
start the engine. Make sure the DPD lamp or
“AUTO REGEN.”, “MANUAL REGEN.”
indicators on the instrument panel cluster is
turned OFF. (This is to relearn exhaust
differential pressure sensor.)
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
4. Observe the DPD Accumulation Status and
DPD Distance Status with a scan tool and plot
both readings on the DPD status table. Refer
to DPD Status Table in DPD Control System
Check.
Is the intersected range located in C or D?
—
Go to Step 4 Go to Step 5
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 246 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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