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NAXJA Forum User
- Location
- Penacook, NH
98 classic 4L/AW4/Upcountry/ 120k miles
Problem:
MIL light came on. OBDII says code p1494--"leak detection pump switch does not respond to input". Did search & found elect conn dia. but no test specs. FSM schematics do not show LDP. FSM says to refer to "Powertrain Diagnostic Service Manual" (which I don't have) and not much else.
Two part question
1) Can anyone out there provide the electrical test specs/schematic for the three wires going to the LDP and/or perhaps any vacuum tests that can be performed?
2) Only known symtoms are MIL light on and Evap/purge solenoid cycling continuously at approx a 1 second rate. No obvious bad plumbing or leaks. Anyone have a solution for a similar problem? Thx in advance, bar.
Problem:
MIL light came on. OBDII says code p1494--"leak detection pump switch does not respond to input". Did search & found elect conn dia. but no test specs. FSM schematics do not show LDP. FSM says to refer to "Powertrain Diagnostic Service Manual" (which I don't have) and not much else.
Two part question
1) Can anyone out there provide the electrical test specs/schematic for the three wires going to the LDP and/or perhaps any vacuum tests that can be performed?
2) Only known symtoms are MIL light on and Evap/purge solenoid cycling continuously at approx a 1 second rate. No obvious bad plumbing or leaks. Anyone have a solution for a similar problem? Thx in advance, bar.
