just picked up on this thread after running a search.
My 4ws has recently failed and i've run a diagnostic by jumping the TWS pin to GND. The good news is it gives me a code through the 4ws warning light on the dash (code=5), but i cant find literature anywhere on 4ws codes. any ideas?
(I'm hoping code 5 doenst = 'you're about to spend many $$$'
Once again.. einstein to the rescue... (my manuals cover OZ)
code 5: possible failure rear steering angle sensor, or harness.
check 4WS control unit connections.
check wiring harness for open or short circuit.
inspect rear steering angle sensor. this is done by lifting the carpet in the trunk, and disconnecting the socket..
measure the resistance of the terminals from the sensor...
D - B: 3.5 - 6.5 ohms
A - B: 0.5 - 5.7 ohms
if not within specifications... replace the rear steering gear assembly.. (ouch)
Hopefully it will be a wiring fault, if it's the sensor, you are looking at a replacement steering rack.
"A bus station is where a bus stops; a train station is where a train stops; on my desk I have a work station." Cardomain pageUK626Club UK & Ireland Member of the Year 2004, 2006 and 2007
I have the original Mazda '88 Training Manual that outlines everything about 4WS. I left the company during the Gulf War, so I don't know if anything changed after '90. The #1 thing that seems to go brain-dead is the Timer box under the passenger seat (I've replaced two). The diagnosis leads you to believe that you need a new computer.... The computer is a lot more expensive than the timer box, and you still have the problem (intermittant brain-fade w/dash light) Everything else that goes wrong is "dirty connectors" over the years.
Chick, you can pay a mechanic to read the codes with a diagnostic machine or you can make your own code reader like most of us have using some wire and an LED which will flash out the codes which you can then translate to find what it is.
Thank you again Einstein!
I don't get up on the net as often as I used to, I've been demobilized (from the Marines) and don't have unlimited access anymore. Nice to know that there is someone that fully understands the system (and puts up with its quirks) that's willing to help out
There are two speed sensors. The main one is in the speedometer, the other at the transaxle (base of the cable at the gear). The transaxle sensor is used as a "backup". Clean the connections and check operation again before replacing parts. The sensor on the transaxle usually gets gumed-up. You can't repair sensors, just test them (with a multimeter) and replace them when they go dead.