C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Jul 7, 2016 | 01:53 PM
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I have the FSM on CD and can't seem to find the list of codes!

Going crazy trying to figure what the hell is going on with this 93 LT1!
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Old Jul 7, 2016 | 02:06 PM
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section 6-E of FSM what code(s) do you have?
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Old Jul 7, 2016 | 04:56 PM
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Originally Posted by Kevova
section 6-E of FSM what code(s) do you have?

On 1. I have C25 & H25

On 4. I have H15,H34,and H36

Thats using The speedometer. When I use the check engine light setup I get 13 and 15

I came up 6-E and still have not found the list of codes!

Last edited by Herb; Jul 7, 2016 at 05:22 PM. Reason: adding Text!
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Old Jul 7, 2016 | 05:20 PM
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1) 25 related to courtesy lights

4) 15 Coolant Temp Sensor -high / 34 MAP sensor - signal low / 36 opti high resolution fault.

The ECM codes are all history codes, check connections, clear codes and see if they come back.

CCM code 25 for courtesy lights is current you need to follow trouble chart for code in FSM
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Old Jul 7, 2016 | 07:52 PM
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[QUOTE=Kevova;1592582628]1) 25 related to courtesy lights

4) 15 Coolant Temp Sensor -high / 34 MAP sensor - signal low / 36 opti high resolution fault.

The ECM codes are all history codes, check connections, clear codes and see if they come back.

CCM code 25 for courtesy lights is current you need to follow trouble chart for code in FSM[/QUOTe

CCM shows code 25 is the IAT!

I changed the IAT connection and the beast has awakened!

Thank God!
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