Pinpoint Tests TL: Generator Over Temperature Fault: Introduction
WARNING: This page is about a different car, the 2017 Lincoln MKZ, 2017 Ford Fusion, and 2017 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
TO PREVENT THE RISK OF HIGH-VOLTAGE SHOCK, ALWAYS FOLLOW PRECISELY ALL WARNINGS AND SERVICE INSTRUCTIONS, INCLUDING INSTRUCTIONS TO DEPOWER THE SYSTEM. THE HIGH-VOLTAGE SYSTEM UTILIZES APPROXIMATELY 300 VOLTS DC, PROVIDED THROUGH HIGH-VOLTAGE CABLES TO ITS COMPONENTS AND MODULES. THE HIGH-VOLTAGE CABLES AND WIRING ARE IDENTIFIED BY ORANGE HARNESS TAPE OR ORANGE WIRE COVERING. ALL HIGH-VOLTAGE COMPONENTS ARE MARKED WITH HIGH-VOLTAGE WARNING LABELS WITH A HIGH-VOLTAGE SYMBOL. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY OR DEATH.
NOTE:
The hybrid transmission directional controls are electronic, unlike conventional automatic transmissions. Pay close attention to the transmission wiring harness circuits between the TCM and the transmission assembly when carrying out any wiring harness repairs. Make sure to repair one circuit at a time and verify the correct circuit and pin locations before attempting to operate the vehicle.
This pinpoint test is intended to diagnose the following:
- transmission assembly (7000)
- TCM (7B012)
COIL TEMPERATURE SENSOR EXPECTED VALUES
| Temperature | Temperature Sensor Values | |
|---|---|---|
| °C | °F | Resistance (K ohms) |
| -40 | -40 | 1976.57 |
| -30 | -22 | 980.38 |
| -20 | -4 | 513.98 |
| -10 | 14 | 283.03 |
| 0 | 32 | 162.82 |
| 10 | 50 | 97.39 |
| 20 | 68 | 60.34 |
| 30 | 86 | 38.58 |
| 40 | 104 | 25.39 |
| 50 | 122 | 17.14 |
| 60 | 140 | 11.85 |
| 70 | 158 | 8.37 |
| 80 | 176 | 6.03 |
| 90 | 194 | 4.42 |
| 100 | 212 | 3.30 |
| 110 | 230 | 2.50 |
| 120 | 248 | 1.92 |
| 130 | 266 | 1.49 |
| 140 | 284 | 1.18 |
| 150 | 302 | 0.938 |
| 160 | 320 | 0.711 |
| 170 | 338 | 0.572 |
| Pin | Circuit |
|---|---|
| 15 | GCTRTN (Generator Coil Temperature Return) |
| 14 | GCT (Generator Coil Temperature) |
| Pin | Circuit |
|---|---|
| 15 | GCTRTN (Generator Coil Temperature Return) |
| 16 | GCT (Generator Coil Temperature) |