Engine Control System (4HK1) 1A-101
Circuit/ System Testing DTC P0103
13
Observe the DTC Information with a scan tool.
Are there any DTCs that you have not
diagnosed?
—
Go to DTC List
System OK
Step
Action
Value(s)
Yes
No
Step
Action
Value(s)
Yes
No
1
Did you perform the Diagnostic System Check
- Engine Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
1.
Install a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Start the engine.
4.
Observe the Mass Air Flow (MAF) Sensor
parameter with a scan tool.
Is the MAF Sensor parameter more than the
specified value?
4.9 volts
Go to Step 3
Go to Diagnostic
Aids
3
Monitor the DTC Information with a scan tool.
Is DTC P0560 also set?
—
Go to Step 4
Go to Step 5
4
1.
Turn OFF the ignition.
2.
Disconnect the MAF sensor harness
connector.
3.
Turn ON the ignition, with the engine OFF.
Is the MAF Sensor parameter less than the
specified value?
0.1 volts
Go to DTC P0560
Go to Step 7
5
1.
Turn OFF the ignition.
2.
Disconnect the MAF sensor harness
connector.
3.
Turn ON the ignition, with the engine OFF.
Is the MAF Sensor parameter less than the
specified value?
0.1 volts
Go to Step 6
Go to Step 7
6
Connect a test lamp between the low reference
circuit (pin 2 of J-38) and battery voltage.
Does the test lamp illuminate?
—
Go to Step 9
Go to Step 8
7
Important:
The MAF sensor may be damaged if
the sensor signal circuit is shorted to a voltage
source.
1.
Test the signal circuit between the ECM (pin
69 of J-14) and the MAF sensor (pin 3 of J-38)
for the following conditions:
• A short to battery or ignition voltage
• A short to the 12 volts reference
• A short to any 5 volts reference
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 13
Go to Step 12
LG4HKED-WE-0871.book 101
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