Some DIC lights don't illuminate on start-up
07-05-2018, 10:22 PM
#1
4th Gear
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Some DIC lights don't illuminate on start-up
Hello group, I haven't seen this particular problem yet in a thread, or I missed it. On start-up, I'm to understand all the DIC lights illuminate momentarily. My ASR OFF, Low Coolant, and Service Ride Control (yes I have the option) lights don't illuminate on start-up. I took apart the DIC (surprisingly not a hard job) and checked the three bulbs and sockets and all checked good for continuity and I got them to light on the bench. Only thing I could think of is their contacts on the circuit board, but I didn't see any problems there, the metal surfaces all looked clean. Is there something else controlling these three lights for a "bulb check" or is it possible they don't light on start-up. Any help would be appreciated as I've run out of ideas and I do like everything working. BTW, the ASR OFF light doesn't come on when I press the ASR button, must I be driving at a certain speed for this to happen? Thank you group.
07-07-2018, 07:13 AM
#2
Le Mans Master
You don't state year, but I suspect a late model C4, but according to my 96 manual the ASR system active light and Service Ride Control Light comes on briefly when I turn the ignition key to RUN, The Low Coolant Warning Light doesn't come on. Next time I'm in my Vette I will have to watch to verify.
The ASR OFF light should come on whenever you press the button, it is not related to speed.
I don't recall if the EBTCM (Electronic Brake Traction Control Module) controls these lights or the BCM does based on inputs for the EBTCM. The EBTCM is located in the compartment behind the drivers seat, maybe try re-seating the connector.
The ASR OFF light should come on whenever you press the button, it is not related to speed.
I don't recall if the EBTCM (Electronic Brake Traction Control Module) controls these lights or the BCM does based on inputs for the EBTCM. The EBTCM is located in the compartment behind the drivers seat, maybe try re-seating the connector.
07-07-2018, 07:48 AM
#3
4th Gear
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You don't state year, but I suspect a late model C4, but according to my 96 manual the ASR system active light and Service Ride Control Light comes on briefly when I turn the ignition key to RUN, The Low Coolant Warning Light doesn't come on. Next time I'm in my Vette I will have to watch to verify.
The ASR OFF light should come on whenever you press the button, it is not related to speed.
I don't recall if the EBTCM (Electronic Brake Traction Control Module) controls these lights or the BCM does based on inputs for the EBTCM. The EBTCM is located in the compartment behind the drivers seat, maybe try re-seating the connector.
The ASR OFF light should come on whenever you press the button, it is not related to speed.
I don't recall if the EBTCM (Electronic Brake Traction Control Module) controls these lights or the BCM does based on inputs for the EBTCM. The EBTCM is located in the compartment behind the drivers seat, maybe try re-seating the connector.
07-07-2018, 12:42 PM
#5
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07-07-2018, 12:58 PM
#6
It’s normal. All of the important DIC lights come on as a bulb check, but there are a few lights that for whatever reason GM did not see fit to include with the diagnostic check. This is true for late model LT1 cars at least, not sure about the older style dash.
07-07-2018, 08:55 PM
#7
Le Mans Master
https://tech.corvettecentral.com/201...trouble-codes/