Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1984CAVALIER L4-121 2.0L VIN P TBIREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTRANSMISSION POSITION SENSOR/SWITCHTESTING AND INSPECTION
1984 Chevrolet Cavalier L4-121 2.0L VIN P TBI
Transmission Position Sensor/Switch: Testing and Inspection
1984 Chevrolet Cavalier L4-121 2.0L VIN P TBISECTION Testing and Inspection
Fig.162 - WIRING DIAGRAM for Chart C-1A Park/Neutral Switch. VIN P:
CHART C-1A, PARK/NEUTRAL SWITCH
The Park/Neutral Switch is closed to ground in Park or Neutral and open in Drive ranges. The ECM supplies 12 volts through an internal resistor to CKT 434 and senses that the switch is closed when the voltage at terminal B10 drops to less than 1 volt.
Fig.161 - Chart C-1A Park/Neutral Switch:
1. Checks for switch closing in the P/N position. This is indicated by low voltage on CKT 434.
2. Checks to see that voltage increases in D/R range.
3. Checks for faulty wiring to ECM or faulty ECM itself. If voltage is present, it means wiring and ECM are OK.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.