Dodge ZB 2005 Service Manual page 1190

Symptom:
P0136-O2 SENSOR 1/2 HEATER CIRCUIT MALFUNCTION
When Monitored and Set Condition:
P0136-O2 SENSOR 1/2 HEATER CIRCUIT MALFUNCTION
When Monitored: Ignition ON, with battery voltage greater than 10.4 volts.
Set Condition: The state of the PCM relay control circuit, between the PCM and relay
coil, does not match the desired state.
GOOD TRIP EQUAL TO ZERO
O2 SENSOR HEATER RELAY
(K342) FUSED ASD RELAY OUTPUT CIRCUIT
(K512) O2 HEATER RELAY CONTROL CIRCUIT OPEN
(K512) O2 HEATER RELAY CONTROL CIRCUIT SHORTED TO GROUND
PCM
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
2 Turn the ignition off.
Remove the Heater Relay from the PDC.
Measurement is taken at the Heater Relay component.
Measure the resistance of the O2 Sensor Heater Relay Coil.
Is the resistance above 100 ohms?
Yes → Replace the O2 Sensor Heater Relay.
→ Go To 3
No
3 Ignition on, engine not running.
With the DRBIII , actuate the ASD Relay.
Using a 12-volt test light connected to ground, probe the (K342) Fused ASD Relay
Output circuit of the O2 Heater Relay in the PDC.
Does the test light illuminate brightly when the relay actuates?
Yes → Go To 4
→ Repair the open or short to ground in the (K342) ASD Relay
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Output circuit. Inspect the related fuse and repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
69
APPLICABILITY
All
All
All