Dtc P0217 (Flash Code 542) - Isuzu N 2008 Series Workshop Manual

1A-130 Engine Control System (4JJ1)

DTC P0217 (Flash Code 542)

Circuit Description
The engine coolant temperature (ECT) sensor is
installed to the thermostat housing. The ECT sensor is
a variable resistor and it measures the temperature of
the engine coolant. If the ECM detects an excessive
high coolant temperature, this DTC will set.
Condition for Running the DTC
• DTCs P0116, P0117, P0118, P060B and P0697
are not set.
• The battery voltage is between 18 to 32 volts.
• The ignition switch is ON.
• The engine is running.
Condition for Setting the DTC
Either of following condition is met:
• The ECM detects that the engine coolant
temperature is more than 110°C (230°F) for 5
seconds.
• The ECM detects that the engine coolant
temperature is more than 120°C (248°F) for 5
seconds during the DPD filter regeneration.
Action Taken When the DTC Sets
• The ECM will not illuminate the MIL or SVS lamp.
Refer to DTC Type Definitions for Action Taken
When the DTC Sets - Type D.
Circuit/ System Testing DTC P0217
Step
Did you perform the Diagnostic System Check -
1 Engine Controls?
1. Install a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.
2
4. Monitor the DTC Information with a scan tool.
Is DTC P0117 also set?
1. Test the engine cooling system for the
following condition. Refer to Cooling System
in Section 1C Engine Cooling.
• Engine coolant level
• Engine coolant leakage
• Cooling fan belt slippage
3
• Cooling fan clutch working
• Thermostat working
• Water pump working
• Radiator clogging
2. Repair or replace as necessary.
Did you find and correct the condition?
Action
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the DTC - Type D.
Diagnostic Aids
• After starting the engine, the ECT should rise
steadily to about 80 to 85°C (176 to 185°F) then
stabilize when the thermostat opens.
• Use the Temperature vs. Resistance table to test
the ECT sensor at various temperature levels to
evaluate the possibility of a skewed sensor. A
skewed sensor could result in poor driveability
concerns.
• The Total Engine Coolant Overtemperature Events
parameter on the scan tool indicates number of
overheat events.
Notice: This DTC is caused by an engine overheat
condition (e.g. low engine coolant level). Since this
DTC does not illuminate any lamps, clear the DTC and
ensure there are no signs of engine damage.
Excessive engine overheat may damage internal
engine components.
Value(s) Yes
—
Go to Step 2
—
Go to DTC P0117
—
Go to Step 7
No
Go to Diagnostic
System Check -
Engine Controls
Go to Step 3
Go to Step 4