Dodge ZB 2005 Service Manual page 1282

Symptom:
P1492-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTAGE
TOO HIGH
When Monitored and Set Condition:
P1492-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTAGE TOO HIGH
When Monitored: With the ignition key on.
Set Condition: The PCM senses the voltage from the Battery Temperature Sensor above
4.9 volts for 3 seconds.
BATTERY TEMP SENSOR VOLTAGE ABOVE 4.8 VOLTS
BATTERY TEMPERATURE SENSOR
(K25) BATTERY TEMP SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K25) BATTERY TEMP SIGNAL CIRCUIT OPEN
(K900) SENSOR GROUND CIRCUIT OPEN
PCM
TEST
1 Ignition on, engine not running.
Record all DTCs and the related Freeze Frame data.
With the DRBIII , monitor the Battery Temperature Sensor voltage.
Is the voltage above 4.8 volts?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
2 Turn the ignition off.
Disconnect the Battery Temp Sensor harness connector.
Ignition on, engine not running.
With the DRBIII in sensors, read the Batt Temp Sensor voltage value.
Connect a jumper wire between the (K25) Batt Temp Signal circuit and the (K900)
Sensor ground circuit at the Battery Temp Sensor connector.
Did the Battery Temp Sensor voltage change from greater than 4.5 volts to less than
1.0 volt?
Yes → Replace the Battery Temperature Sensor.
→ Go To 3
No
NOTE: Remove the jumper wire before continuing.
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
161
APPLICABILITY
All
All