Dodge ZB 2005 Service Manual page 1188

P0135-O2 SENSOR 1/1 HEATER FAILURE —
HEATER CONTROL CIRCUIT SHORTED TO GROUND
HEATER GROUND CIRCUIT OPEN
PCM
TEST
1 Turn the ignition off.
NOTE: Wait a minimum of 8 minutes to allow the O2 Sensor to cool down
before continuing the test.
Ignition on, engine not running.
With the DRBIII , actuate the O2 Heater Test.
With the DRBIII , monitor O2 Sensor voltage for at least 2 minutes.
Does the voltage stabilize between 0.1 and 0.3 of a volt during the Heater test?
Yes → Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
→ Go To 2
No
2 Turn the ignition off.
NOTE: Allow the O2 Sensor to cool to room temperature.
Disconnect the O2 Sensor harness connector.
Measure the resistance across the O2 Sensor Heater element component side.
NOTE: The resistance value will increase with warmer temperatures.
On a four O2 Sensor system the resistance value for 1/1 and 2/1 O2 Heater elements
is between 3.3 and 4.1 ohms and the 1/2 and 2/2 O2 Heater elements is between 4.0
and 5.0 ohms at 70° F(21.1°C).
Is the resistance within the listed specifications?
Yes → Go To 3
→ Replace the O2 Sensor.
No
3 NOTE: The O2 Heater Supply circuit may be a fused (K342) ASD Relay
Output or an O2 Sensor (A242) Heater Relay Output, depending on the O2
Sensor being tested.
Ignition on, engine not running and the O2 Sensor still disconnected.
With the DRBIII , actuate the O2 Heater Test.
Using a 12-volt test light connected to ground, probe the (K342) Fused ASD Relay
Output or (A242) O2 Heater Relay Output circuit at the O2 Sensor harness
connector..
Does the light illuminate brightly?
Yes → Go To 4
→ Repair the open in the (A342) Fused ASD Relay Output circuit or
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
the (A242) O2 Heater Relay Output circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
67
APPLICABILITY
All
All
All