Chrysler 2005 Crossfire SRT6 Service Manual page 2070

9 - 146 ENGINE - ELECTRICAL DIAGNOSTICS
(P0135) O2 SENSOR 1/1 HEATER CIRCUIT LOW (CONTINUED)
When Monitored and Set Condition
• When Monitored: Engine Running and Heater duty cycle greater than 0%
• Set Condition: The PCM detects the O2 Heater voltage is out of acceptable range. Below 0.0926 volt.
O2 HEATER CONTROL SHORT TO GROUND
O2 HEATER ELEMENT
POWERTRAIN CONTROL MODULE
For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIA-
GRAMS).
Diagnostic Test
1.
PRE-DIAGNOSTIC CHECK OUT
Note: Always perform diagnostics with a fully charged battery.
Note: Check connectors — Clean/repair as necessary. Poor pin to
terminal connections can set DTCs.
Note: Check for applicable TSBs related to the problem.
Turn the ignition on.
With the DRB III , read PCM DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and
connectors. Repair as necessary.
Perform this procedure prior to symptom diagnosis.
Continue
Go To 2
2.
O2 HEATER ELEMENT
Note: Check the Engine Control Fuse 2 in the Relay Control Mod-
ule. If it is open, multiple DTCs will be set in the PCM. Determine
the cause of the open fuse before continuing using the wiring
diagrams/schematics as a guide.
Note: Allow the O2 Sensor to cool down to room temperature.
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Note: Check connectors — Clean/repair as necessary.
Measure the resistance of the O2 Sensor Heater element at the O2
Sensor harness connector.
Is the O2 Sensor Heater element resistance between 8.5 and 9.5
ohms?
Yes >> Go To 3
No >> Replace the Oxygen Sensor. (Refer to 14 - FUEL SYS-
TEM/FUEL INJECTION/O2 SENSOR - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
POSSIBLE CAUSES
ZH