Dodge Dakota (ND). Manual — part 653
P0135-O2 SENSOR 1/1 HEATER PERFORMANCE (CONTINUED)
2.
O2 SENSOR HEATER ELEMENT
Turn the ignition off.
NOTE: Allow the O2 sensor to cool down to room temperature.
Disconnect the O2 Sensor harness connector.
Measure the resistance of the O2 Heater Element across the 1/1 O2 Sensor connector between the O2 Heater
Control terminal and the Heater ground terminal.
NOTE: O2 Heater Element resistance values should be measured at 70°F (21.1°C). The resistance value will
vary with different temperature values.
Is the resistance of the O2 Sensor Heater Element between 2.0 and 30.0 ohms?
Yes
>> Go To 3
No
>> Replace the O2 Sensor.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
3.
(K99) O2 1/1 HEATER CONTROL CIRCUIT OPEN
Disconnect the C2 PCM harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing
the PCM harness connectors will damage the PCM terminals
resulting in poor terminal to pin connection. Install Miller Special
Tool #8815 to perform diagnosis.
Measure the resistance of the (K99) O2 1/1 Heater Control circuit from
the O2 harness connector to the appropriate terminal of special tool
#8815.
Is the resistance below 0.5 of an ohm?
Yes
>> Go To 4
No
>> Repair the excessive resistance in the (K99) O2 1/1
Heater Control circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
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P0135-O2 SENSOR 1/1 HEATER PERFORMANCE (CONTINUED)
4.
(Z43) O2 1/1 HEATER GROUND CIRCUIT OPEN
Measure the resistance between ground and the (Z43) O2 1/1Heater
ground circuit in the O2 Sensor harness connector.
Is the resistance below 0.5 of an ohm?
Yes
>> Go To 5
No
>> Repair the excessive resistance in the (Z43) O2 1/1
Heater ground circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
5.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
Were there any problems found?
Yes
>> Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace and program the Powertrain Control Module per Service Information.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 151
P0137-O2 SENSOR 1/2 CIRCUIT LOW
9 - 152
ENGINE ELECTRICAL DIAGNOSTICS
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P0137-O2 SENSOR 1/2 CIRCUIT LOW (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Engine running for less than 30 seconds and the O2 Sensor Heater Temperature is less than 251°C (484°F)
with battery voltage greater 10.99 volts.
•
Set Condition:
The oxygen sensor signal voltage is below 2.5196 volts for 3 seconds after starting engine. One Trip Fault.
Three good trips to turn off the MIL.
Possible Causes
(K904) O2 RETURN DOWNSTREAM CIRCUIT SHORTED TO GROUND
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO GROUND
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO THE (K904) O2 RETURN DOWNSTREAM CIRCUIT
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO THE (Z42) O2 1/2 HEATER GROUND CIRCUIT
O2 SENSOR
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
O2 SENSOR BELOW 2.52 VOLTS
Start the engine.
Allow the engine to reach normal operating temperature.
With a scan tool, read the 1/2 O2 Sensor voltage.
Is the voltage below 2.52 volts?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
(K141) O2 1/2 SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the 1/2 O2 Sensor harness connector.
Ignition on, engine not running.
With a scan tool, monitor the 1/2 O2 Sensor voltage.
Is the O2 Sensor voltage above 4.8 volts?
Yes
>> Go To 3
No
>> Go To 5
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ENGINE ELECTRICAL DIAGNOSTICS
9 - 153
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