TAC Blown???
Thread Starter
Burning Brakes
Joined: Aug 2010
Posts: 771
Likes: 40
From: killeen TX
TAC Blown???
Went to the track yesterday. As soon as I launched the car went into limp mode. DIC said reduced engine power, service traction control, service active handling. Got the car off the track and started troubleshooting and found fuse 17 blown. At this point I hooked up the laptop and scanned and cleared the codes. Replaced the fuse and decided to try another pass maybe it would tell me what was happening in my HPT logs. The next pass it blew the fuse again. This time it threw the TPS 1 and 2 codes and a P1515. Got it off the track replaced the fuse but it stayed in reduced power mode. So I limped the car home and started troubleshooting this morning. Found The throttle actuator line had been cut into by the knock sensor harness bracket. Repaired that but it's still in limp mode. It threw a new code after the wire repair...P1516. Is my TAC module fried?
I've tried everything and can't nail it down for sure. And I dont want to spend money on a part that won't fix the problem.
HELP!!
I've tried everything and can't nail it down for sure. And I dont want to spend money on a part that won't fix the problem.
HELP!!
Thread Starter
Burning Brakes
Joined: Aug 2010
Posts: 771
Likes: 40
From: killeen TX
disconnected the TAC module and tested ohms at fuze 17. Got .61 when testing at the 2k setting on my voltmeter. Don't know which setting is correct to test with. But I imagine any resistance on that line is a sign of a short??
Thread Starter
Burning Brakes
Joined: Aug 2010
Posts: 771
Likes: 40
From: killeen TX
Morning bump. Just add to this. Yesterday I cleaned all the grounds listed in bills thread.
codes thrown
pcm
P1120 h c
p1220 h c
p1516 h c
p1518 h c
TCS
c1276 h
c1278 h
u1016 h
u1000 h
BCM
b0502 h
b0507 h
b2482 h
b2587 h
b2592 h
u1016 h
SDM
u1000 h
u1016 h
AO-LDCM
u1016 h
A1-RDCM
u1016 h
A6-SCM
u1016 h
BO-RFA
u1000 h
u1064 h
u1016 h
I cleared all the codes. the only ones that came back are the 4 PCM codes. Those are persistant.
codes thrown
pcm
P1120 h c
p1220 h c
p1516 h c
p1518 h c
TCS
c1276 h
c1278 h
u1016 h
u1000 h
BCM
b0502 h
b0507 h
b2482 h
b2587 h
b2592 h
u1016 h
SDM
u1000 h
u1016 h
AO-LDCM
u1016 h
A1-RDCM
u1016 h
A6-SCM
u1016 h
BO-RFA
u1000 h
u1064 h
u1016 h
I cleared all the codes. the only ones that came back are the 4 PCM codes. Those are persistant.
Last edited by jimbos'ss; Jul 14, 2013 at 12:24 PM.
Thread Starter
Burning Brakes
Joined: Aug 2010
Posts: 771
Likes: 40
From: killeen TX
found this thread
http://forums.corvetteforum.com/c5-t...d-eng-pwr.html
trying to borrow a throttle body from someone so I can test it. Really thinking that's the issue . Due to the cable to the motor having been shorted by the harness rubbing on that bracket.
http://forums.corvetteforum.com/c5-t...d-eng-pwr.html
trying to borrow a throttle body from someone so I can test it. Really thinking that's the issue . Due to the cable to the motor having been shorted by the harness rubbing on that bracket.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Remove the Fuse (17) ,, THEN disconnect the C2 connector on the TAC Module and measure pin 7 to ground. It should read infinity
Measure the fuse holder pin/slot that is connected to the TAC connector, (C2 Pin#7 ) with one end of the OHM Meter and the other lead to C2 Pin#7
You should see real close to ZERO OHMS meaning that you have a complete circuit.
If all that is good,,, you need a new TAC Module
BC
Measure the fuse holder pin/slot that is connected to the TAC connector, (C2 Pin#7 ) with one end of the OHM Meter and the other lead to C2 Pin#7
You should see real close to ZERO OHMS meaning that you have a complete circuit.
If all that is good,,, you need a new TAC Module
BC