Location: Newcastle, NSW, Australia
Registered: May 2002
Speed Sensors
Wed, 12 February 2003 00:21
Farren,
As the fault code indicates, you have no signal from SP2 to the ECU. This is a common problem as the Chaser (and Cressida) use a unique secondary speed sensor that cannot be fed directly into the ECU. Cruise control definitely does not operate from the secondary speed sensor; only the primary speed sensor. I'll explain:
All Toyota's use 2 speed sensors; SP1 being the primary speed sensor and SP2 being the secondary or backup speed sensor. SP1 is used for things like Engine/Auto ECU, Cruise Control, A/C and Power Steer while SP2 is used as a backup to allow the auto to still shift (and get you back home).
Chasers (and Australian Cressida's) are a special case. SP2 is actually a multi-tooth sensor primarily used to act as the rear ABS sensor. The ABS computer then converts this signal and sends it to the engine ecu as the backup speed sensor. Unless you have ABS on your Cressida you will not be able to use this sensor.
If you have the original box and your Cressida does NOT have ABS, you can swap the sensors to provide you with the backup signal the ecu is looking for.
Wed, 12 February 2003 00:21
