[Z06] 1-4 ligth
Thread Starter
2nd Gear
Joined: Jun 2008
Posts: 2
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1-4 ligth
hey guys i just purchase my first vette a 03 z and i'm geting the'' 1-4 ligth'' going to 1 to 2 and 2 is hard to go in some times whats wrong with the car or is this normal
and by the way the car is BEAST
thank's and advance
rico
and by the way the car is BEAST
thank's and advance
rico
Advanced
Joined: Mar 2008
Posts: 85
Likes: 0
From: Biloxi Mississippi
it doesn't have a skip shift eliminator. that makes it go from 1st to 4th gear to keep the rpm's low. fairly easy to fix. just buy the skip shift eliminator from one of the vendors, jack up the car, plug it in, and you're done. the light will still come on but it's much easier to shift through the first to second gear
Racer
Joined: Jun 2008
Posts: 381
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Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
If you shift from 1 to 2 before 15 mph or after 20 mph you will not engage the 1-4 forced shift. If you are aggessive on the throttle and shift between 15 and 20 you will not engage the CAGS as it is known. The fix is free if you retrain your right foot and don't baby the car. You can spend a dollar on a resistor and a small section of duct tape to stop CAGS from engaging or $20 to buy a resistor encased in plastic with some connectors added to it to do the same thing.
From the Service Manual:
With the ignition ON, battery voltage is supplied directly to the skip shift solenoid. The powertrain control module (PCM) controls the solenoid by grounding the control circuit. When the skip shift system is active the PCM also grounds the control circuit of the skip shift lamp. The lamp illuminates to inform the driver that the 1-4 skip shift is engaged. The PCM determines when the skip shift system is active when the following parameters are met:
The vehicle speed is between 24-31 km/h (15-19 mph).
The engine coolant temperature (ECT) is greater than 77°C (171°F).
The BARO is greater than 76 kPa.
The accelerator pedal position (APP) is less than 26 percent.
When the conditions are met the powertrain control module (PCM) grounds the skip shift solenoid control circuit. This energizes the skip shift solenoid and mechanically blocks the gear shift lever from going into the second or third gear positions. When the drivers pulls back on the shift lever with the system enabled the transmission will go into fourth gear.
When the conditions for skip shift engagement are no longer met the powertrain control module (PCM) disables the skip shift solenoid, allowing the driver to use second and third gears.
Once the skip shift solenoid is enabled the system will not be re-enabled until the vehicle speed returns to 0 km/h (0 mph) and the conditions for enabling skip shift solenoid are met. This means if you were in a forced 1 to 4 shift and then slow down without stopping you can use second gear.
Bill
From the Service Manual:
With the ignition ON, battery voltage is supplied directly to the skip shift solenoid. The powertrain control module (PCM) controls the solenoid by grounding the control circuit. When the skip shift system is active the PCM also grounds the control circuit of the skip shift lamp. The lamp illuminates to inform the driver that the 1-4 skip shift is engaged. The PCM determines when the skip shift system is active when the following parameters are met:
The vehicle speed is between 24-31 km/h (15-19 mph).
The engine coolant temperature (ECT) is greater than 77°C (171°F).
The BARO is greater than 76 kPa.
The accelerator pedal position (APP) is less than 26 percent.
When the conditions are met the powertrain control module (PCM) grounds the skip shift solenoid control circuit. This energizes the skip shift solenoid and mechanically blocks the gear shift lever from going into the second or third gear positions. When the drivers pulls back on the shift lever with the system enabled the transmission will go into fourth gear.
When the conditions for skip shift engagement are no longer met the powertrain control module (PCM) disables the skip shift solenoid, allowing the driver to use second and third gears.
Once the skip shift solenoid is enabled the system will not be re-enabled until the vehicle speed returns to 0 km/h (0 mph) and the conditions for enabling skip shift solenoid are met. This means if you were in a forced 1 to 4 shift and then slow down without stopping you can use second gear.
Bill
