Dodge ZB 2005 Service Manual page 1284

Symptom:
P1493-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTAGE
TOO LOW
When Monitored and Set Condition:
P1493-AMBIENT/BATTERY TEMPERATURE SENSOR VOLTAGE TOO LOW
When Monitored: With the ignition on.
Set Condition: The PCM senses the voltage from the Battery Temperature Sensor below
0.5 of a volt for 3 seconds.
BATTERY TEMP SENSOR VOLTS BELOW 0.5 OF A VOLT
BATTERY TEMPERATURE SENSOR
(K25) BATTERY TEMP SIGNAL CIRCUIT SHORTED TO GROUND
(K25) BATTERY TEMP SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND
PCM
TEST
1 Ignition on, engine not running.
Record all DTCs and the related Freeze Frame data.
With DRBIII , monitor the Ambient/Battery Temperature Sensor voltage.
Is the voltage below 0.5 of a volt?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION Symptom (Diagnos-
No
2 Ignition on, engine not running.
With the DRBIII in sensors, read the Battery Temp Sensor voltage.
Disconnect the Battery Temp Sensor harness connector.
Did the Battery Temperature Sensor voltage change from below 1.0 volt to above 4.5
volts?
Yes → Replace the Battery Temperature Sensor.
→ Go To 3
No
3 Turn the ignition off.
Disconnect the PCM harness connectors.
Measure the resistance between ground and the (K25) Battery Temp Signal circuit at
the Battery Temp Sensor harness connector.
Is the resistance below 100 ohms?
Yes → Repair the short to ground in the (K25) Batt Temp Signal circuit.
→ Go To 4
No
POSSIBLE CAUSES
ACTION
tic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
163
APPLICABILITY
All
All
All