HVAC codes? What do they mean?
Thread Starter
Former Vendor
Joined: Oct 2003
Posts: 8,479
Likes: 417
From: Devil's Island CA
HVAC codes? What do they mean?
Well, I have the dreaded EBCM failure, so I pulled the codes. I got these:
10 PCM -
P1416 AIR System bank 2-B
28 TCS -
C1214 Sol Valve relay Contact or coil CKT Open
C1221 LF Wheel Speed Sensor Input Signal is 0
C1222 RF Wheel Speed Sensor Input Signal is 0
C1291 Open brake lamp Sw Contacts During Deccel
99 HVAC -
B0361 Left Actuator Feedback short to GND
U1096 Loss of Communications with IPC (No State of Health Message)
U1064 Lose of Communications with DCM
U1160 Loss of Communications with LDCM
After reseting my codes (the 1214 wouldn't reset though), I cheched 5 days later and got these:
28 - TCS C1214 Sol Valve relay Contact or coil CKT Open
99 HVAC U1096 Loss of Communications with IPC (No State of Health Message)
U1160 Loss of Communications with LDCM
I know the 1214, but what's with the other ones? Thanks!
10 PCM -
P1416 AIR System bank 2-B
28 TCS -
C1214 Sol Valve relay Contact or coil CKT Open
C1221 LF Wheel Speed Sensor Input Signal is 0
C1222 RF Wheel Speed Sensor Input Signal is 0
C1291 Open brake lamp Sw Contacts During Deccel
99 HVAC -
B0361 Left Actuator Feedback short to GND
U1096 Loss of Communications with IPC (No State of Health Message)
U1064 Lose of Communications with DCM
U1160 Loss of Communications with LDCM
After reseting my codes (the 1214 wouldn't reset though), I cheched 5 days later and got these:
28 - TCS C1214 Sol Valve relay Contact or coil CKT Open
99 HVAC U1096 Loss of Communications with IPC (No State of Health Message)
U1160 Loss of Communications with LDCM
I know the 1214, but what's with the other ones? Thanks!
Tech Contributor
Joined: Oct 1999
Posts: 41,057
Likes: 9,817
From: Charlotte, NC (formerly Endicott, NY)
They are communication codes. The modules on the bus continously talk to each other and sometimes the messages are missed due to noise on the bus or some other transient event. Most of the time they don't mean anything since the modules miss one State of Health message but get the next one. Do they have H's or C's after them? H is for History and C is for current. As for your 1214 don't jump to the conclusion you have an EBCM failure. There are a lot of things to check before the EBCM is blamed. The best way to understand what all this means is to get the Service Manual, read the Theory of Operation for the ABS system, DTC descriptions and diagnostic procedures.
Bill
Bill
Last edited by Bill Dearborn; Jan 11, 2007 at 08:42 PM.
Thread Starter
Former Vendor
Joined: Oct 2003
Posts: 8,479
Likes: 417
From: Devil's Island CA
Most of those said H. The only ones that said C next to them is the 1214. The other 2 came up sometime in the last 5 days. So those are recurring ones. I was just wondering what they mean.
(U1096 Loss of Communications with IPC (No State of Health Message)
U1160 Loss of Communications with LDCM )
(U1096 Loss of Communications with IPC (No State of Health Message)
U1160 Loss of Communications with LDCM )
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
might take a look at these
http://www.cccorvetteclub.org/EBCM_CLEANING.htm a great place to start when you have these issues....
