Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual - part 168

TEST

ACTION

APPLICABILITY

NOTE: Visually inspect both the component and the PCM connectors. Look
for damage, partially broken wires and backed out or corroded terminals
Turn the ignition off.
Disconnect the Ambient Air Temp Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K25) AAT Signal circuit in the Ambient Air Temperature
Sensor harness connector.
Is the voltage above 5.2 volts?

All

Yes

→ Repair the short to battery voltage in the (K25) AAT Signal

circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 3

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Ignition on, engine not running.
With the DRBIII

t, read the Ambient Air Temperature Sensor voltage.

Is the voltage above 4.9 volts?

All

Yes

→ Go To 4

→ Go To 7

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Using a jumper wire, jumper across the Ambient Air Temperature Sensor harness
connector.
Ignition on, engine not running.
With the DRBIII

t, read the Ambient Air Temperature voltage.

Is the voltage below 1.0 volt?

All

Yes

→ Replace the Ambient Air Temperature Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 5

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K25) AAT Signal circuit from the Ambient Air
Temperature Sensor harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 6

→ Repair the open in the (K25) AAT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

DRIVEABILITY - NGC

P0071-AMBIENT TEMP SENSOR PERFORMANCE —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K167) Sensor ground circuit from the Ambient Air
Temperature Sensor harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 5.0 ohms?

All

Yes

→ NOTE: Before continuing, check the PCM harness connector

terminals for corrosion, damage, or terminal push out. Repair as
necessary. Replace and program the Powertrain Contorl Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Repair the open in the (K4) Sensor ground circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the (K25) AAT Signal circuit.
Is the resistance below 100 ohms?

All

Yes

→ Repair the short to ground in the (K25) AAT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 8

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (K25) AAT Signal circuit and the (K4) Sensor
ground circuit in the Ambient Air Temperature Sensor harness connector.
Is the resistance below 100 ohms?

All

Yes

→ Repair the Sensor ground shorted to the (K25) AAT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ NOTE: Before continuing, check the PCM harness connector

terminals for corrosion, damage or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

DRIVEABILITY - NGC

P0071-AMBIENT TEMP SENSOR PERFORMANCE —

Continued

Symptom:

P0072-AMBIENT TEMP SENSOR LOW

When Monitored and Set Condition:

P0072-AMBIENT TEMP SENSOR LOW

When Monitored:

The ignition key on.

Set Condition:

Ambient Temperture Sensor is less than .0392 of a volt at the PCM. One

Trip Fault.

POSSIBLE CAUSES

AMBIENT AIR TEMPERATURE SENSOR VOLTAGE BELOW 0.3 VOLTS

AMBIENT AIR TEMPERATURE SENSOR INTERNAL FAILURE

(K25) AAT SIGNAL CIRCUIT SHORTED TO GROUND

(K25) AAT SIGNAL CIRCUIT SHORTED TO (K4) SENSOR GROUND CIRCUIT

PCM

TEST

ACTION

APPLICABILITY

Ignition on, engine not running.
With the DRBIII

t, read the Ambient Air Temperature Sensor voltage.

Is the voltage below 0.3 of a volt?

All

Yes

→ Go To 2

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

Turn the ignition off.
Disconnect the Ambient Air Temperature Sensor harness connector.
Ignition on, engine not running.
With the DRBIII

t, read Ambient Air Temperature Sensor voltage.

Is the voltage above 1.0 volt?

All

Yes

→ Replace the Ambient Air Temperature Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 3

All

Yes

→ Repair the short to ground in the (K25) AAT Signal circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 4

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

All

Yes

→ Repair the (K4) Sensor ground shorted to the (K25) AAT Signal

circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 5

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

DRIVEABILITY - NGC

P0072-AMBIENT TEMP SENSOR LOW —

Continued

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