Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 1407

3.

(K353) POST-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO (K915)
POST-CATALYST EXHAUST TEMPERATURE SENSOR GROUND CIRCUIT

Measure the resistance between the (K353) Post-Catalyst Exhaust Tem-
perature Sensor Signal circuit and the (K915) Post-Catalyst Exhaust
Temperature Sensor Ground circuit in the Post-Catalyst Exhaust Tem-
perature Sensor harness connector.

Is the resistance above 1000 ohms?

Yes

>> Go to 4

No

>> Repair the (K353) Post-Catalyst Exhaust Temperature Sen-

sor Signal circuit for a short to the (K915) Post-Catalyst
Exhaust Temperature Sensor Ground circuit.

Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

4.

(K353) POST-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN CIRCUIT OR HIGH
RESISTANCE

Measure the resistance of the (K353) Post-Catalyst Exhaust Tempera-
ture Sensor Signal circuit between the Post-Catalyst Exhaust Tempera-
ture Sensor harness connector and the Engine Control Module (ECM)
harness connector.

Is the resistance below 10.0 ohms?

Yes

>> Go to 5

No

>> Repair the (K353) Post-Catalyst Exhaust Temperature Sen-

sor Signal circuit for an open circuit or high resistance.

Perform the ECM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

5.

POST-CATALYST EXHAUST TEMPERATURE SENSOR

Turn the ignition off.

Connect the Engine Control Module (ECM) connector.

Turn the ignition on.

With the scan tool, clear DTCs.

With the scan tool, select View DTCs.

Monitor the scan tool for at least two minutes.

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NOTE: The scan tool should display a Post-Catalyst Exhaust Temperature Sensor high voltage or open cir-
cuit DTC with the Post-Catalyst Exhaust Temperature Sensor connector disconnected.

Does the scan tool display the DTC as described above?

Yes

>> Replace the Post-Catalyst Exhaust Temperature Sensor in accordance with the service information.

Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

No

>> Go to 6

6.

ENGINE CONTROL MODULE (ECM)

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Post-Catalyst
Exhaust Temperature Sensor and the Engine Control Module (ECM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.

Look for the data to change or for the DTC to reset during the wiggle test.

Refer to any Technical Service Bulletins that may apply.

Were any problems found?

Yes

>> Repair as necessary.

Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

No

>> Replace the Engine Control Module (ECM) in accordance with the Service Information.

Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

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ENGINE ELECTRICAL DIAGNOSTICS - DIESEL

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P2033-EXHAUST GAS TEMPERATURE SENSOR CIRCUIT HIGH - BANK 1 SENSOR
2

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For a complete wiring diagram Refer to Section 8W

•

When Monitored:
With the ignition on.

•

Set Condition:
The ECM detects that the (K353) Post-Catalyst Exhaust Temperature Sensor Signal circuit is shorted to volt-
age.

Possible Causes

INTERMITTENT DTC

(K353) POST-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

(K915) POST-CATALYST EXHAUST TEMPERATURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE

(K353) POST-CATALYST EXHAUST TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

(K915) POST-CATALYST EXHAUST TEMPERATURE SENSOR GROUND CIRCUIT OPEN OR HIGH
RESISTANCE

POST-CATALYST EXHAUST TEMPERATURE SENSOR

ENGINE CONTROL MODULE (ECM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

1.

DTC IS ACTIVE

Ignition on, engine not running.

With the scan tool, Clear DTCs in the Engine Control Module (ECM).

Monitor the scan tool for at least two minutes.

Cycle the ignition key off and on several times, leaving the ignition on for at least 10 seconds at a time.

Start the engine.

Allow the engine to reach normal operating temperature.

With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

>> Go To 2

No

>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -

DIAGNOSIS AND TESTING)

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