Good morning all,
2002 LX470 CDN Spec 335000km. Rig is stuck in low, stiff as a board and has the flashing "off" . The system went from fully functional to dead over a period of a couple days, slowly going down to the Low position (or lower)
Vehicle was in for AC repairs at the local Toyota dealership and I asked them to look into some codes I pulled from the AHC system. 1718, 1732, 1763 are the 3 codes. I cannot get it into test mode to manually raise the vehicle.
Essentially they pulled the same codes I did and told me they needed to replace the $600 pressure sensor before anything else could be done.
After probing the sensor and testing per the FSM excerpts I found on some threads here myself, the voltage is out of range (5 volts from ground to one pin and .5 volts on ground to the other pin when pressing the raise button to neutral position. It is likely the sensor is in fact failed. The pump runs with 12 volts applied to it and the AHC Fuse is intact, Relay is functional. when the pump runs it sounds smooth for a few seconds then it sounds like it is dead heading which I would assume is due to the levelling valves being closed.
I have extensively read the AHC threads on the forum, some people say to unplug the pressure sensor and you should be able to raise the vehicle up if that is the problem. This does not work.
I found a complete used pump, pressure sensor, temp sensor and reservoir assembly a couple hours from where I live from a fellow that converted his rig to conventional suspension (1998 LX) purchased this and 3 the three level sensors for $200.00. Only problem is the pressure sensor is a "flat" connector 3 pin Vs the one only my '02 LX is the triangular one.
My first question: Are there any other things I can do to test out the system to get it out of fail-safe/lockout
Second : Can I use the 1998 pressure sensor if I use the old harness from the 98 truck and splice to the 3 wire harness on my truck. If so are the wire colors the same, if not does anyone have a pinout for the 2 sensors.
Thanks in advance
-Mitch
2002 LX470 CDN Spec 335000km. Rig is stuck in low, stiff as a board and has the flashing "off" . The system went from fully functional to dead over a period of a couple days, slowly going down to the Low position (or lower)
Vehicle was in for AC repairs at the local Toyota dealership and I asked them to look into some codes I pulled from the AHC system. 1718, 1732, 1763 are the 3 codes. I cannot get it into test mode to manually raise the vehicle.
Essentially they pulled the same codes I did and told me they needed to replace the $600 pressure sensor before anything else could be done.
After probing the sensor and testing per the FSM excerpts I found on some threads here myself, the voltage is out of range (5 volts from ground to one pin and .5 volts on ground to the other pin when pressing the raise button to neutral position. It is likely the sensor is in fact failed. The pump runs with 12 volts applied to it and the AHC Fuse is intact, Relay is functional. when the pump runs it sounds smooth for a few seconds then it sounds like it is dead heading which I would assume is due to the levelling valves being closed.
I have extensively read the AHC threads on the forum, some people say to unplug the pressure sensor and you should be able to raise the vehicle up if that is the problem. This does not work.
I found a complete used pump, pressure sensor, temp sensor and reservoir assembly a couple hours from where I live from a fellow that converted his rig to conventional suspension (1998 LX) purchased this and 3 the three level sensors for $200.00. Only problem is the pressure sensor is a "flat" connector 3 pin Vs the one only my '02 LX is the triangular one.
My first question: Are there any other things I can do to test out the system to get it out of fail-safe/lockout
Second : Can I use the 1998 pressure sensor if I use the old harness from the 98 truck and splice to the 3 wire harness on my truck. If so are the wire colors the same, if not does anyone have a pinout for the 2 sensors.
Thanks in advance
-Mitch