Dodge ZB 2005 Service Manual page 1182

P0132-O2 SENSOR 1/1 CIRCUIT VOLTAGE TOO HIGH —
TEST
5 NOTE: Two relays may be used on this vehicle for the different types of
Heated O2 Sensors. One uses the ASD Relay which is only used with PWM
O2 Sensor Heaters and the other uses the O2 Heater Relay.
Verify which relay is used to supply power for the O2 Sensor Heater being tested.
Measure the resistance between the O2 Sensor Signal circuit and the O2 Heater
Supply circuit at the O2 Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short between the O2 Sensor Signal circuit and the
→ Go To 6
No
6 Measure the resistance of the (K900) Sensor ground circuit from the O2 Sensor
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 7
→ Repair the open in the (K900) Sensor ground circuit.
No
7 Connect the PCM harness connectors.
Ignition on, engine not running.
With the DRBIII actuate the O2 Heater Test.
Measure the voltage on the O2 Heater Supply circuit.
Is the voltage above 11.0 volts?
→ Repair the Open in the Heater Supply circuit. The Heater Supply
No
Yes → Go To 8
8 Turn the ignition off.
Disconnect the PCM harness connectors.
NOTE: The O2 Sensor Heater ground may be a Pulse Width Modulated
circuit or a chassis ground depending on the type of O2 Sensor being tested.
* Measure the resistance of the PWM O2 Sensor Heater Control circuit from the O2
Sensor harness connector to the PCM harness connector if it applies to the O2 Sensor
being tested
OR
* Measure the resistance of the (Z1) O2 Sensor Heater ground circuit from the O2
Sensor harness connector to the PCM harness connector if it applies to the O2 Sensor
being tested.
Is the resistance below 5.0 ohms?
Yes → Go To 9
→ Repair the open in the O2 Sensor ground (PWM) circuit.
No
ACTION
(K342) ASD Relay Output or (A242) O2 Heater Relay Output
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
circuit can be and output from the ASD Relay or an O2 Heater
Relay.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
61
Continued
APPLICABILITY
All
All
All
All