6E1-184 DRIVEABILITY AND EMISSIONS
mating, broken locks, improperly formed or
damaged terminals, and poor terminal-to-wire
connection.
• Damaged harness - Inspect the wiring harness for
damage, shorts to Ground, shorts to Battery
Positive, and Open Circuits. If the harness appears
to be OK, observe the IAT display on the Scan Tool
while moving connectors and wiring harnesses
related to the IAT sensor. A change in the IAT
display will indicate the location of the fault.
If Diagnostic Trouble Code 69 cannot be duplicated,
the information included in the Failure Records data
can be useful in determining vehicle mileage since the
Diagnostic Trouble Code was last set.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If Diagnostic Trouble Code 69 can be repeated
only by duplicating the Failure Records conditions,
refer to the "Temperature vs. Resistance Values"
table. The table may be used to test the IAT sensor
at various temperatures to evaluate the possibility
of a "shifted" sensor that may be open above or
below a certain temperature. If this is the case,
replace the IAT sensor. If the IAT sensor appears
to be OK, the fault is intermittent; refer to
Diagnostic Aids.
Intake Air Temperature Sensor
°C °F OHMS
Temperature vs. Resistance Values
(approximate)
100 212 177
80 176 332
60 140 667
45 113 1188
35 95 1802
25 77 2796
15 59 4450
5417280
−5 23 12300
−15 5 21450
−30 −22 52700
−40 −40 100700
DTC (Flash DTC = 69)
Intake Air Temperature (IAT) Sensor Too High
Step Action Value(s) Yes No
1
Was the "On-Board Diagnostic (OBD) System Check"
performed? -
Go to Step 2
Go to OBD
System
Check
2
Ignition ON, engine OFF Observe the "Intake Air Temp"
values displayed on the Scan Tool.
Is the "Intake Air Temp" values below the specified value?
5V
−36°C
(−32.8°F) Go to Step 4 Go to Step 3
3
1. Ignition ON, engine OFF.
2. Using a Scan Tool, monitor info for Diagnostic Trouble
Code 69.
Does the Scan Tool indicate Diagnostic Trouble Code 69
failed?
-
Refer to Test
Description
Refer to
Diagnostic
Aids
4
1. Ignition OFF.
2. Disconnect the IAT sensor electrical connector.
3. Jumper the IAT signal circuit and the sensor ground
circuit together at the IAT sensor harness connector.
4. Ignition ON.
5. Observe the "Intake Air Temp" values displayed on the
Scan Tool.
Is the "Intake Air Tempe" values at the specified value?
0V
140°C
(284°F) Go to Step 6 Go to Step 5
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