1.2 DISPLAY CCM data

Code Definition
01 Fuel level (gallons; tenths)
02 Dimming potentiometer (A/D) counts (see note A)
03 Ambient light sensor (A/D) counts
04 Rear defogger timer (seconds) (see note B)
05 Vehicle speed (MPH)
06 Pass-key (A/D) counts
07 Ignition voltage
08 Switched battery voltage
09 Cluster incandescent lamp dimming PWM (0-100%)
10 Cluster LCD back-light lamps dimming PWM (0-100%)
11 Radio and climate control LCD back-light lamps dimming PWM (0-100%)
12 LED dimming PWM (0-100%)
13 Oil monitor effective revolution (100,000 revolutions per count) (see note C)
14 C CM software version (this display is available on 1992 and up Corvettes)

Note:
1: headlights or parking lights must be on
2: engine must be running
3: LT1 0/200 counts/LT5 0–250 counts
1.3 DISPLAY CCM inputs/status
Input ID Number 0=disabled, English, off, closed or no
01 Pass-Key fuel 1=enabled
02 English/metric status 1=Metric
03 Door key switch alarm info 1=enabled
04 Right door ajar 1=open
05 Left door ajar 1=open
06 Key in ignition 1=yes
07 Hatch ajar 1=open
08 Power door unlock 1=yes
09 Power door lock 1=yes
10 parking lights 1=”on”
11 Rear defogger input 1=”on”
12 Seat belt switch 1=buckled
13 High beam switch input 1=”on”
14 Low oil level switch 1=low oil (this is used on 1992+ Corvettes)
1.4 CYCLE CCM outputs
01 Change oil indicator
02 Check gauges indicator (see note 1)
03 Fasten seatbelt indicator
04 Security lamp indicator
05 High beam indicator
06 Chime 1 (indicated as chime 0 1990-1991 Corvette)
07 Chime 2 (indicated as chime 1 1990-1991 Corvette)
08 LCD blanking control
09 Horn Relay (1990-1991 Corvette) Rear defogger relay (1992-1996 Corvette)
10 Rear defogger relay (1990-1991 Corvette) Courtesy lamp relay (1992-1996 Corvette)
11 Courtesy lamp relay (1990-1991 Corvette) Low oil indicator (1992-1996 Corvette)
12 Not used (1990-1991 Corvette) Starter enable relay (1992-1996 Corvette) (see note 2)
13 Starter enable relay (1990-1991 Corvette) Delayed accessory bus relay (1992-1996 Corvette)
14 Not used (1990-1991 Corvette) Horn relay (1992-1996 Corvette)

Note A: engine must be running to see indicator cycle; it will be on without the engine running
B: the starter enables relay output will be cycled only when the proper Pass-key is in the ignition, or if Pass-key is not programmed.
Clearing the CCM codes can be done after the automatic sequence of codes has occurred with the following instructions:

Press the TRIP RESET button until “1.0” is displayed in the module number area.
Then press the TRIP/ODO button until “1.7” is displayed in the module number area.
Once there, press and hold the ENG/MET button until “—“is displayed. This will clear any CCM codes.
After “—“ is displayed, turn the key off, wait ten seconds, turn the key back on and check for any CCM codes.