Diagnostic Aids
Check harness routing for potential short to ground in circuit No. 410.
"SCAN" tester displays engine temperature in degrees Centigrade. After engine is started, temperature should rise steadily to about 90°C, then stabilize when thermostat opens. See INTERMITTENT TROUBLE CODES in the CCC TESTS W/O CODES article in this section.
The TEMPERATURE-TO-RESISTANCE VALUE chart may be used to test coolant sensor at various temperatures to evaluate possibility of "slewed" (mis-scaled) sensor. A "slewed" sensor could result in poor driveability complaints.