Hummer H1 Service Manual page 1093

28 PCM/Tech 1 Scan Tool
DTC P0113 - Intake Air Temperature (IAT) Sensor Circuit High Voltage
Step
1 NOTE: Before clearing DTC(s) use the Scan tool "Capture Info" to record
Freeze Frame and Failure Record for reference, as data will be lost when
"Clear Info" function is used.
Was the "On-Board Diagnostic (OBD) System Check" performed?
2 1. Scan tool connected.
2. Start the engine.
3. Monitor the IAT display on Scan Tool.
Is the IAT display colder than or equal to the specified value?
3 1. Turn the engine "OFF."
2. Turn the ignition "ON."
3. Disconnect the IAT sensor connector.
4. Jumper the IAT harness terminals together.
Does the scan tool display IAT greater than or equal to the specified
value?
4 Jumper the IAT sensor signal circuit to a known good ground.
Does the scan tool display an IAT greater than or equal to the specified
value?
5 DTC is intermittent. If no additional DTCs are stored, refer to "Diagnostic
Aids."
Are additional DTCs stored?
6 Inspect the sensor connector and PCM connector for a proper connection.
Was a problem found?
7 Check the IAT sensor ground circuit for an open between the IAT sensor
and the PCM.
Was a problem found?
8 Check the IAT sensor signal circuit for an open between the IAT sensor
and the PCM.
Was a problem found?
9 Repair the circuit as necessary.
Is the action complete?
10 Replace the faulty IAT sensor.
Is the action complete?
11 Replace the faulty PCM.
NOTE: If the PCM is faulty, the new PCM must be programmed. Go to
PCM replacement and programming procedures.
Is the action complete?
12 1. Using the Scan Tool, select "DTC," "Clear Info."
2. Start engine and idle at normal operating temperature.
3. Select "DTC," "Specific," then enter the DTC number which was set.
4. Operate vehicle within the conditions for setting this DTC as specified
in the supporting text.
Does the Scan Tool indicate that this diagnostic Ran and Passed?
13 Using the Scan Tool, select "Capture Info," "Review Info."
Are any DTC's displayed that have not been diagnosed?
_____________________________________________________
Action Value(s) Yes
— Go to Step 2
-30°C Go to Step 3
(-22°F)
151°C Go to Step 6
(303°F)
151°C Go to Step 7
(303°F)
— Go to the
applicable
DTC Table
— Go to Step 9
— Go to Step 9
— Go to Step 9
— Go to Step 12
— Go to Step 12
— Go to Step 12
— Go to Step 13
— Go to the
applicable
DTC table
®
No
Go to OBD
System
Check
Go to Step 5
Go to Step 4
Go to Step 8
Go to
Diagnostic
Aids
Go to Step 10
Go to Step 11
Go to Step 11
—
—
—
—
System OK