DTC CI-131: Incorrect 12-Pulse Speed Signal
- This DTC will set if signal leads are short-circuited to supply voltage. Instrument cluster shows no symptoms for this DTC. A DTC will set in Engine Control Module (ECM) and Malfunction Indicator Light (MIL) will come on. Cruise control will shut down and set a DTC, and automatic volume control will not function.
- To correct this problem, place gear selector in "N" position. Lift and support front wheels. Ensure front wheels are hanging free. With scan tool connected to DLC, turn ignition on. Go into scrolling values and read 12-48-pulse vehicle speed sensor signal. Spin a front wheel exceeding 1.2 MPH for 2 seconds. If OK status is not displayed, repair short to voltage in Yellow/Black wire between instrument cluster connector terminal A7 and appropriate module terminal. See 12-PULSE SPEED SIGNAL CIRCUITS table. Retest system. See Figure. If OK status is displayed, problem is intermittent. Retest system.
12-PULSE SPEED SIGNAL CIRCUITS
| Equipped With | Module/Terminal |
|---|---|
| Cruise Control | Cruise/8S |
| Electronic Radio | Radio/7B |
| VGLA | Central Locking/Anti-Theft Alarm/B9 |
| RTI (Navigation System) | RTI/A7 |
| All | ECM/B18 |