Dash Lights - ABS and Traction Control

[CRK]

Hi there,

I've owned a second hand 2011 Leaf (ZE0-007187) for about three months and driving it last week I noticed two of the dash lights on, ABS and Traction Control. I was driving 50kms and upon testing the brakes it sounded like metal on metal and wasn't stopping as per normal. I had to apply brakes pretty hard before I could get it to stop and it felt grabby, like ABS was trying to engage. The 12v battery is less than six months old, I've taken it out and put it on a battery tester/charger and it's ok. I've tried clearing error codes but there are two persistent which are:

C118A-01 -09 ABS E-Driven Int Brake System BRC-124
C1A60-01 09 BRAKE Control Mobule BR-39

From the forums it looks like it's pointing to needing a replacement Brake Control Module and upon dropping it to my mechanic he's come up with the same fix. The car cost NZD$3400 and the replacement part is $2K from a wrecker which isn't viable to spend.

Any further ideas to look to for a resolution before I get rid of it?

I would greatly appreciate any advice.

Thank-you.

 

[nlspace]

That repair estimate seems way too much.

The FSM for the first code lists 3 possible causes:

Electrically-driven intelligent C brake unit
ABS actuator and electricunit (control unit)
CAN communication line

Since you also have some HV CAN buss error codes, then i would suspect a wiring harness issue (rodent damage) or contact corrosion in a connector terminal (rodent piss).

The metal grinding sound is likely in the so-called "intelligent" brake master cylinder, an overly-complex electric motor driven ball screw actuator. Not sure how to lubricate the mechanism, but i suspect it needs the word. Grease is the word.

Maybe try some stationary brake press cycles to recalibrate the stroke. Press it down all the way and then release, do this several times while parked and listen with the hood up if the noise is coming out of this hi-tech smart master cylinder.

A weak 12 V battery may have let it drift (lazy return) and it needs a good workout to get back in line. Double check your 12V that it is good and strong and fully charged, and monitor its voltage when you press the brake pedal to see how much the voltage sags.