Dtc P0560 (Flash Code 155) - Isuzu 2008MY N Series Workshop Manual

DTC P0560 (Flash Code 155)

Circuit Description
The ECM provides 12 volts reference voltage to the
mass air flow (MAF) sensor. Battery voltage is supplied
in ECM through the dropping register, and it is
converted into 12 volts. The ECM monitors the voltage
on the 12 volts reference circuit. If the ECM detects the
voltage is excessively low or high, this DTC will set.
Condition for Running the DTC
• DTC P060B is not set.
• The battery voltage is between 18 to 32 volts.
• The ignition switch is ON.
Condition for Setting the DTC
Either of following condition is met:
• The ECM detects that the 12 volts reference circuit
voltage is less than 7 volts.
• The ECM detects that the 12 volts reference circuit
voltage more than 19 volts.
Circuit/ System Testing DTC P0560
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. Turn ON the ignition, with the engine OFF.
2
4. Monitor the DTC Information with a scan tool.
Does the DTC fail this ignition?
1. Turn OFF the ignition for 30 seconds.
2. Disconnect
connector.
3
3. Turn ON the ignition, with the engine OFF.
Does the DTC fail?
1. Turn OFF the ignition for 30 seconds.
2. Leave the MAF sensor harness connector
disconnected.
3. Disconnect the dropping resistor harness
4
connector.
4. Turn ON the ignition, with the engine OFF.
Does the DTC fail?
Measure the resistance across the dropping
resistor.
5
Is the resistance within the specified value?
Action
the MAF sensor harness
Engine Control System (4HK1)
Action Taken When the DTC Sets
• The ECM illuminates the MIL when the diagnostic
runs and fails. Refer to DTC Type Definitions for
Action Taken When the DTC Sets - Type A.
• The ECM limits fuel injection quantity.
Condition for Clearing the DTC
• Refer to DTC Type Definitions for Condition for
Clearing the MIL/ DTC - Type A.
Diagnostic Aids
• If an intermittent condition is suspected, refer to
Intermittent Conditions in this section.
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls
Connector End Views or ECM Connector End Views
Value(s)
—
Go to Step 2
—
Go to Step 3
—
Go to Step 4
—
Go to Step 10
45 to 55 Ω
Go to Step 6
Yes No
Go to Diagnostic
System Check -
Engine Controls
Go to Diagnostic
Aids
Go to Step 13
Go to Step 5
Go to Step 15
1A-207