Sable V6-232 3.8L (1988)
a. If reading is 8 volts or above, replace fan motor and recheck.
b. If reading is less than 8 volts, proceed to step 5.
5.
With ignition switch in Off position and integral controller electrical connector disconnected, disconnect cooling fan motor electrical connector.
Connect a jumper wire between integral controller electrical connector terminals 3 and 6. Using a suitable digital voltmeter, connect positive lead
of voltmeter to cooling fan motor electrical connector and negative lead to battery ground terminal and note voltmeter reading.
a. If voltmeter is 8 volts or more, check cooling ground circuit and service as necessary.
b. If voltmeter reading is less tan 8 volts, check for open circuit in wiring from pin 3 to pin 4 of integral controller electrical connector and
repair as necessary.
6.
With processor connected, check engine coolant level and correct as necessary. Start engine and allow to reach operating temperature, then place
ignition switch in Off position and wait approximately 10 seconds. Disconnect electrical connector from engine coolant temperature sensor, then
using a suitable digital volt/ohmmeter, measure sensor resistance.
a. If resistance is between 1,500 and 2,000 ohms, replace processor.
b. If resistance is not between 1,500 and 2,000 ohms, replace engine coolant temperature sensor.
7.
With ignition switch in the Off position, disconnect integral controller. Using a suitable digital volt/ohmmeter, check resistance between
integrated controller pins 17 and 24.
a. If resistance is between 50 and 100 ohms, check short or open in circuit 52 HDEF.
b. If resistance is between 50 and 100 ohms, replace integral controller.
8.
With ignition switch in Off position, disconnect integrated controller. Using a suitable digital voltmeter, measure voltage between battery ground
terminal and pins 1 and 2 of the integrated controller electrical connector.
a. If voltage reading is 10 1/2 volts or more, proceed to step 9.
b. If voltage reading is less than 10 1/2 volts, check for open in battery supply circuit and repair as necessary.
9.
With ignition switch in the Off position, disconnect integrated controller electrical connector. Connect a jumper wire between terminals 1 and 3 of
the integral controller electrical connector.
a. If fan motor is operating, proceed to step 10.
b. If fan motor is not operating, refer to step 11.
10.
With ignition switch in the Off position and integral controller connected, disconnect processor. Place ignition switch in the On position and note
if cooling fan is operating.
a. If fan motor does not operate, refer to step 6.
b. If fan motor is operating, refer to step 11.
11.
With ignition switch in the Off position, disconnect processor and integrated controller electrical connectors. Using a suitable digital
volt/ohmmeter, measure resistance between integrated controller electrical connector terminals 14 and 15.
a. If reading is 10,000 ohms or more, replace integrated controller.
b. If reading is less than 10,000 ohms, check short in circuit EDF 55 and repair as necessary.
12.
With ignition switch in Off position, disconnect cooling fan and integral controller connectors. Connect a jumper wire between integral controller
electrical connector terminals 1 and 3. Using a suitable digital voltmeter, connect voltmeter positive lead to cooling fan electrical connector and
voltmeter negative lead to battery ground terminal.
a. If voltmeter reading is 8 volts or more, check cooling fan motor ground circuit for open.
b. If voltage reading is less than 8 volts, check wiring from integrated controller electrical connector terminals 3 and 4.
13.
With ignition switch in Off position, disconnect integrated controller. Using a suitable digital voltmeter, measure voltage between battery ground
terminal and pins 3 and 4 of the integrated controller electrical connector.
a. If voltage reading is 10 1/2 volts or more, proceed to step 14.
b. If voltage reading is less than 10 1/2 volts, check for open in battery supply circuit and repair as necessary.
