P0642
DTC P0642: Throttle Position Sensor Power SupplyTECHNICAL DESCRIPTION
- PCM checks the throttle position sensor power voltage for abnormal conditions
DESCRIPTIONS OF MONITOR METHODS
Throttle position sensor source voltage is smaller than the specified value
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory for the item monitored)
- Not applicable
Sensor (The sensor is determined to be normal)
- Not applicable
DTC SET CONDITIONS
Check Conditions
- Battery positive voltage is higher than 6.3 volts
Judgement Criteria
- Throttle position sensor power voltage should be 4.1 volts or less for 0.5 second
OBD-II DRIVE CYCLE PATTERN
None
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- PCM failed
DIAGNOSIS
Required Special Tools:
- MB991958: Scan tool (MUT-III Sub Assembly)
- MB991824: V.C.I
- MB991827: USB Cable
- MB991910: Main Harness A
STEP 1. Using scan tool MB991958, read the diagnostic trouble code (DTC).
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"(OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. After the DTC has been deleted, read the DTC again.
4. Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0642 set?
YES: Replace the PCM.
NO: It can be assumed that this malfunction is intermittent Refer to How to Use Troubleshooting/Inspection Service Points.