Diagnostic Aids
After engine is started, temperature should rise steadily to about 203°F (95°C) and stabilize when thermostat opens.
Codes 14, 23 and 32 set at the same time could be a result of an open in Light Green/Black sensor ground wire.
When replacing TPS, check COOLANT TEMPERATURE SENSOR RESISTANCE table. A "shifted" sensor could result in driveability complaints.
COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| 210 (99) | 190 |
| 160 (71) | 400 |
| 100 (38) | 1250 |
| 70 (21) | 2350 |
| 40 (4) | 4780 |
| 20 (-7) | 8100 |
| 0 (-18) | 14,650 |