Battery Temperature Sensor; Diagnostic Trouble Codes; On-Board Diagnostic System Test - Chrysler Neon PL 1997 Manual

BATTERY ENGINE WIRING HARNESS SENSOR HARNESS BATTERY TRAY TEMPERATURE SENSOR
8C - 10 CHARGING SYSTEM
DIAGNOSIS AND TESTING (Continued)

BATTERY TEMPERATURE SENSOR

To perform a complete test of this sensor and its
circuitry, refer to the appropriate Powertrain Diag-
nostic Procedures manual. To test the sensor only,
refer to the following:
(1) The sensor is located under the battery and is
attached to the battery tray (Fig. 6). A two-wire pig-
tail harness is attached directly to the sensor. The
opposite end of this harness connects the sensor to
the engine wiring harness.
Fig. 6 Battery Temperature Sensor
(2) Disconnect the two-wire pigtail harness from
the engine harness.
(3) Attach ohmmeter leads to the wire terminals of
the pigtail harness.
Fig. 7 Generator Diagnostic Trouble Code
(4) At room temperature of 25° C (75–80° F), an
ohmmeter reading of 9,000 (9K) to 11,000 (11K) ohms
should be observed.
(5) If reading is above or below the specification,
replace the sensor.
(6) Refer to the Removal and Installation section
for procedures.

ON-BOARD DIAGNOSTIC SYSTEM TEST

GENERAL INFORMATION
The Powertrain Control Module (PCM) monitors
critical input and output circuits of the charging sys-
tem, making sure they are operational. A Diagnostic
Trouble Code (DTC) is assigned to each input and
output circuit monitored by the OBD system. Some
circuits are checked continuously and some are
checked only under certain conditions.
If the OBD system senses that a monitored circuit
is bad, it will put a DTC into electronic memory. The
DTC will stay in electronic memory as long as the
circuit continues to be bad. The PCM is programmed
to clear the memory after 50 engine starts if the
problem does not occur again.

DIAGNOSTIC TROUBLE CODES

Diagnostic Trouble Codes (DTC) are two-digit num-
bers flashed on the malfunction indicator (Check
Engine) lamp that identify which circuit is bad. Refer
to Group 25, On Board Diagnostic for more informa-
tion. A DTC description can also be read using the
DRB scan tool. Refer to the appropriate Powertrain
Diagnostic Procedures manual for information.
A DTC does not identify which component in a cir-
cuit is bad. Thus, a DTC should be treated as a
PL