2008 PRIUS: hum under hood, VSC + brake + ABS + (!) lights on, DTC: C1343

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First, check for recalls and maintenance by registering and entering your VIN at : http://www.toyota.com/owners

Here is the workup for DTCs C1341, C1342, C1343, C1344 (all with various detailed codes.. you do have those I hope)

https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/21avn/cic13416.pdf

Don't forget that 'Search' (upper right corner) is your friend (when working correctly), and someone can always help when or if it ever fails.

 

Do you have a way to check the codes?

 

It’s possible. OBD2 readers can read emissions codes but may not read Toyota specific codes, like for brakes. You might get more codes if you use a Toyota specific reader like Techstream. Plenty of those around. Here’s one but it would take a month to get this one.

Cheapest MINI VCI for TOYOTA Single Cable Support Toyota TIS OEM Diagnostic Software

You would need an older single core laptop or netbook to run it also.

 

For the humming part for my gen 2, I dont have any error codes or problems, but on idle the engine bay does have a hum as well, I always thought it was just how the electric motor works when its on idle, but ill have to check again to see if its as LOUD as what you have.

 

	DTC No.	Detection Item	INF Code	Trouble Area
1	C1242/42	Open in IG1 / IG2 Power Source Circuit	87 88	ABS NO. 1 relay ABS NO. 2 relay Harness and connector - Skid control power supply circuit Brake control power supply assembly Hybrid control system
2	C1245/45	Acceleration Sensor Output Malfunction	313	Yaw rate (deceleration) sensor Zero point calibration not done Skid control ECU
3	C1343/64	Rear Hydraulic System RH Malfunction	571 572 573 574 575	Fluid leakage Brake actuator assembly Disc rotor
4	C1344/65	Rear Hydraulic System LH Malfunction	581 582 583 584 585	Fluid leakage Brake actuator assembly Disc rotor

The whining noise is normal and is a combination of the Inverter humming and the coolant pump running. The noise at 0:20 is the accumulator pump running to keep the brake system pressure up. All noises in that video are normal.

 

@aywood, here is what my engine bay sounds like on idle so you can compare, I do not have any code lights on dash and I am driving fine, for now. So id like to say nothing sounds out of the ordinary, good luck.

 

I received the following PM, but felt the answer belongs in this thread.

That is a good question.

One thing it points out is the code reader you used only could see one code, the C1343, whereas the car had 4 codes for you, the C1343 and 3 others.

The decode of the X####/99 notations is:

X#### = the DTC you would retrieve in Techstream, or other Prius aware scanner.
/ = delimiter
99 = Blink Code

So to use one of your codes as an example, C1343/64, the blink code 64 = DTC C1343.

Hope that helps.