Test TC-35B: No Vehicle Speed Sensor Signal
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
- Turn ignition off. Disconnect 3-pin Vehicle Speed Sensor (VSS) connector. Turn ignition on. Using a voltmeter, check voltage of 8-volt power supply circuit on VSS connector. See VSS CONNECTOR WIRE IDENTIFICATION table. If voltage is more than 7 volts, go to next step. If voltage is 7 volts or less, repair open 8-volt power supply circuit. Perform TEST VER-2A .
- Using a voltmeter, check voltage of VSS connector signal circuit at VSS connector. See VSS CONNECTOR WIRE IDENTIFICATION table. If voltage is more than 4 volts, go to next step. If voltage is 4 volts or less, go to step 5) .
- Connect a jumper wire to VSS connector signal circuit at VSS connector. See VSS CONNECTOR WIRE IDENTIFICATION table. Using scan tool, read VSS signal. While observing scan tool, tap other end of jumper wire to VSS connector ground circuit at VSS connector. If scan tool displays more than zero MPH, go to next step. If scan tool does not display more than zero MPH, go to TEST TC-35C
- Remove VSS sensor from transmission. Inspect speedometer pinion gear. If speedometer pinion gear is okay, replace VSS. Perform TEST VER-2A . If speedometer pinion gear is not okay, repair or replace as necessary. Perform TEST VER-2A .
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using an ohmmeter, check resistance of VSS signal circuit between VSS connector and PCM connector terminal No. 66. See PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open VSS signal circuit. Perform TEST VER-2A .
- Using an ohmmeter, check resistance of VSS signal circuit between PCM connector terminal No. 66 and ground. If resistance is less than 5 ohms, repair short to ground in VSS signal circuit. Perform TEST VER-2A . If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A .
VSS CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color | |
|---|---|---|
| VSS 8-Volt Supply Circuit | ||
| Avenger, Sebring Coupe & Talon | Yellow | |
| Breeze, Cirrus, Sebring Conv. & Stratus | Orange/White | |
| Neon | Orange | |
| VSS Signal Circuit | ||
| Avenger, Sebring Coupe & Talon | Yellow/White | |
| Breeze, Cirrus, Neon, Sebring Conv. & Stratus | White/Orange | |
| VSS Ground Circuit | ||
| Avenger, Sebring Coupe & Talon | Black/Dark Green | |
| Breeze, Cirrus, Neon, Sebring Conv. & Stratus | Black/Light Blue | |
PCM CONNECTOR WIRE IDENTIFICATION
| Application | Wire Color | |
|---|---|---|
| PCM Terminal No. 66 (Vehicle Speed Sensor Signal Circuit) | ||
| Avenger, Sebring Coupe & Talon | Yellow/White | |
| Breeze, Cirrus, Neon, Sebring Conv. & Stratus | White/Orange | |