Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual - part 265
sends the message to the Engine Controller. The En-
gine Controller turns on the fan through the fan re-
lay. See Wiring Diagrams Manual for circuity and
diagnostics provided.
Switching through the Engine Controller provides
fan control for the following conditions.
• The fan will not run during cranking until the en-
gine starts no matter what the coolant temperature
is.
• Fan will run when the air conditioning clutch is
engaged and low pressure cutout switch is closed.
• For 4 cylinder application the fan will run at ve-
hicle speeds above about 40 mph only if coolant tem-
perature reaches 110°C (230°F). It will turn off when
the temperature drops to 104°C (220°F). At speeds
below 40 mph the fan switches on at 102°C (215°F)
and off at 93°C (200°F).
• This is to help prevent steaming. The fan will run
only below 16°C (60°F) ambient. Between 38°C
(100°F) to 97°C (195°F) coolant temperature, at idle
and then only for three minutes.
RADIATOR FAN CONTROL—AC/AY BODY V-6
ONLY
For this application, fan control is accomplished
based on coolant temperature, and on A/C head pres-
sure. These vehicles receive the variable displace-
ment compressor. The fan will go on when;
• Coolant temperature reaches 102°C (215°F) and off
at 93.4°C (200°F) regardless of vehicle speed.
• When the head pressure reaches 1516.9 kPa (220
psi) and turn off when the pressure reaches 1103 kPa
(160 psi).
TEMPERATURE GAUGE INDICATION
At idle the temperature gauge will rise slowly to
about 5/8 gauge travel. The fan will come on and the
gauge will drop to about 1/2 gauge travel, this is nor-
mal.
ELECTRIC FAN MOTOR
To check out the electric fan motor, disconnect the
fan motor wire connector and connect it with #14
gauge wires to a good 12-volt battery observing cor-
rect polarity per (Fig. 14). If the fan runs normally,
the motor is functioning properly. If not, replace fan
module using the removal and installation instruc-
tions contained in the Fan Section. If the motor is
noticeably overheated (i.e.; wire insulation melted,
motor charred) the system voltage may be too high.
Check charging system, see Group 8A, Battery/Start-
ing/Charging System Diagnostics.
ELECTRIC FAN MOTOR TEST
Equipment required
• Diagnostic Tool DRB II or equivalent
• Volt/Ohm Meter
• Wiring Diagram Manual
(1) Run the engine to normal operating tempera-
ture.
(2) Check wiring connector in C25, C9, and C26 for
proper engagement, see Wiring Diagram Manual
(3) Using a diagnostic tool, plugged into the diag-
nostic connector rearward of the battery, check the
On-Board Diagnostics (OBD) in the Engine Control-
ler for fault codes, see Group 14, Fuel Injection for
instructions.
(4) If fault code 88-12-35-55 is detected, proceed to
Step 5.
(5) With the ignition switch in the run position,
test for battery voltage (single pin connector) at the
fan relay. Voltage reading OK, proceed to Step 6a.
Voltage at 0-1 volt, proceed to Step 6b.
6(a) With the ignition off, disconnect the 60-way
connector from the Engine Controller (outboard of
battery) and return the ignition to the run position.
Test for battery voltage at cavity 31 of the 60-way
connector (Fig. 15). Voltage reading OK and female
terminal is not damaged, replace the Engine Control-
ler. Voltage reading 0, repair open or short in C27
circuit.
(b) With the ignition off, disconnect the 60-way
connector from the Engine Controller (outboard of
battery) and return the ignition to the run position.
Test for battery voltage at the single pin connector
at the fan relay. Voltage reading OK, replace the
Engine Controller. Voltage reading 0-1 volt, pro-
ceed to Step 7.
(7) With ignition in the run position, test for bat-
tery voltage at the wire (C27) in the 3-way connector
of the fan relay. Voltage reading OK, replace the fan
relay. Voltage reading 0, repair open or short in C27
circuit.
(8) Turn ignition off, connect the 60-way connector
at the Engine Controller and test the system.
Fig. 14 Electric Fan Motor—Typical
7 - 22
COOLING SYSTEM
Ä