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 MANUALSTOYOTA1979PICKUP SR5REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALFUEL SYSTEMEVAPORATIVE EMISSIONS SYSTEMTESTINGVACUUM SWITCHING VALVE (VSV)1978 MODELS
1979 Toyota Pickup SR5
1978 Models
1979 Toyota Pickup SR5SECTION 1978 Models
- Connect vacuum switching valve terminals to battery power as shown. See Fig 1.
- On 20R engines, blow air into passage No. 1, air should come out passage "A". Disconnect battery. Blow air into passage "A", air should come out passage No. 8.
- On 2T-C engines, blow air into each pipe. Air should come out of passages No. 1, 3, 4 and center canister pipe (indicating that all passages are connected). Disconnect battery. Passages No. 1 and 3, and passages No. 0 and 4 should be connected.
- To test VSV continuity (all models), attach ohmmeter lead to VSV body and other lead to each terminal. There should be no continuity. To test VSV for an open circuit, measure resistance between the positive terminal of the VSV connector and other terminals. When cold, resistance should be 48-60 ohms.
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.