632
UnclassifiedStarting
What This Code Means
DST displays TPS1 voltage of 0.2 volts or less with throttle closed; TPS1 voltage falls below 0.2 volts during DBW Throttle Test Mode
Possible Causes
- •Faulty ECM
- •Faulty ECM connection
- •Faulty Throttle (TPS)
- •Intermittent Problem
- •Poor Throttle Connection
- •TPS sensor voltage less than 0.2 volts while cranking or running
- •TPS1 signal circuit open or shorted to ground
Suggested Actions
- 1Disconnect throttle connector from harness
- 2Jumper 5 volt reference circuit and TPS1 signal circuit together at throttle connector
- 3Perform Key On - Engine Off DBW Throttle Test Mode: slowly depress FP while observing TPS1 voltage (or go to DBW page and type desired throttle opening % in FPP1 box)
- 4Turn ignition Off
- 5Turn ignition On
Related General Motors Powertrain Fault Codes
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