C2318
C2318
DTC C2318, sometimes indicated as C231800 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle chassis.
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
2008 TOYOTA PRIUS with 11966.0 miles
On 20 may 2010 at 11,966 miles every brake/stability warning light came on (including the warning for the parking/emergency brake which was not engaged), regenerative braking appeared to have failed, and hydraulic/friction brakes behaved as if abs was acting at a very slow pulse rate, approximately a 5-second cycle. For about 2 seconds during the "off" portion of this cycle the brakes were effectively inoperative, with the parking/emergency brake the only source of braking. This behavior persisted after shutting down and restarting the car. The dealer's service department reported that three errors had been logged: C1247 - stroke sensor C1300 - abs ecu malfunction C2318 - low voltage error resetting the computers cleared the warning indications and restored normal brake system behavior. At my behest, the dealer worked with Toyota engineering to identify why a low voltage would cause a computer failure which could cause substantial loss of braking ability. They kept the car for 8 days but did not appear to complete any sort of root cause analysis of the failure. On 17 december 2012 at 27,324 miles the brakes again failed with the same set of warning lights illuminated. This time, abs does not appear to be active at all. For the first 2-5 cm of brake pedal travel, in the regime where regenerative braking would be active, no braking is evident. As the pedal is further depressed, the hydraulic/friction brakes abruptly engage. Pressing harder does result in increased braking though braking is rough. No pulsation as might be expected from abs was noticed. No attempt was made to brake hard enough to lock up the brakes. The vehicle is currently at the dealer.
ELECTRONIC STABILITY CONTROL, ELECTRICAL SYSTEM SERVICE BRAKES
2004 TOYOTA PRIUS with 9025.0 miles
2004 Toyota Prius died at 65 mph on i-395 carpool lanes. Multiple warning lights flashed on. Was able to coast it over and restart for a mile or two when it completely died again. Was towed to springfield va Toyota dealership were it was serviced. Error codes C2318 (low voltage error - power supply malfunction), battery code 8442 were reported. Also, check engine light on, found code P3791/engine won't start. Reprogrammed ecu dP0199. Cars shutting down in high speed traffic is a crash waiting to happen. We're not convinced that re-setting the engine code is enough to fix the problem. Has the original software problem been located and fixed? Dealership couldn't give us that answer.*ak
ELECTRICAL SYSTEM:12V/24V/48V BATTERY, ENGINE AND ENGINE COOLING:ENGINE