Test TC-35A: No Vehicle Speed Sensor Signal

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

WARNING: Keep hands and feet clear of rotating wheels.

Raise and support vehicle under lower control arms, allowing drive wheels to spin free. Start engine. Using scan tool, read Vehicle Speed Sensor (VSS). Put transmission in any forward gear. If scan tool displays more than zero MPH, go to next step. If scan tool does not display more than zero MPH, go to step 5) .
Condition to set trouble code is not present at this time. NO VEHICLE SPEED SENSOR SIGNAL DTC sets if there is no signal from Vehicle Speed Sensor (VSS) for more than 11 seconds (without electronically controlled transmission) or no VSS signal is present from Transmission Control Module (TCM) for more than 11 seconds (equipped with electronically controlled transmission). If vehicle is NOT equipped with an electronically controlled automatic transmission, go to next step. If vehicle is equipped with an electronically controlled automatic transmission, possible causes are: open or shorted signal circuit, speedometer pinion factor not programmed, output speed sensor circuit problem, failed Powertrain Control Module (PCM) or failed TCM. Go to step 4) .
Possible causes are: open or shorted signal circuit, speedometer pinion damaged, open 8-volt supply circuit, open sensor ground circuit, failed VSS, failed Powertrain Control Module (PCM), faulty connections or wiring. Go to next step.
Inspect all related wiring and connectors and repair as necessary. If no problems were found with wiring and connectors, see INACTIVE TROUBLE CODE CONDITION . Test is complete. Perform TEST VER-2A . If related wiring and connectors were repaired, perform TEST VER-2A .
If vehicle is equipped with an electronically controlled automatic transmission, go to next step. If vehicle is not equipped with an electronically controlled automatic transmission, go to TEST TC-35B .
Using scan tool, read transmission trouble codes. If transmission Diagnostic Trouble Codes (DTCs) 50-58 are present or pinion factor is not programmed, repair transmission as required. See appropriate lemon-25® TRANSMISSION SERVICE & REPAIR manual. If transmission Diagnostic Trouble Codes (DTCs) 50-58 are not present or pinion factor is programmed, go to next step.
Turn ignition off. Disconnect Transmission Control Module (TCM) connector. Connect one end of a jumper wire to TCM connector terminal No. 58. See TCM CONNECTOR WIRE IDENTIFICATION table. Turn ignition on. Using scan tool, read VSS signal. While observing scan tool display, tap other end of jumper wire to ground. If scan tool does not display more than zero MPH, go to next step. If scan tool displays more than zero MPH, repair transmission as required. See appropriate lemon-25® TRANSMISSION SERVICE & REPAIR manual.
Turn ignition off. Disconnect PCM connector. Using an ohmmeter, check resistance of VSS signal circuit between PCM connector terminal No. 66 and TCM connector terminal No. 58. See TCM 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 TCM connector terminal No. 58 and ground. If resistance is less than 5 ohms, repair short to ground on VSS signal circuit. Perform TEST VER-2A . If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A .

TCM CONNECTOR WIRE IDENTIFICATION

Application		Wire Color
TCM Terminal No. 58 (Vehicle Speed Sensor Signal Circuit)
Avenger, Sebring Coupe & Talon		Yellow/White
Breeze, Cirrus, Neon, Sebring Conv. & Stratus		White/Orange