Checks
| Action
|
DEFINITION: The engine has a power variation under a steady
throttle or cruise. The vehicle feels as if it speeds up and slows down
with no change in the accelerator pedal.
|
Preliminary Checks
|
| • | Be sure the driver understands the torque converter clutch (TCC)
operation. |
| • | Be sure the driver understands the A/C compressor operation. |
| • | Use the scan tool in order to make sure the vehicle speed sensor
(VSS) reading matches the vehicle speedometer. This excludes vehicles with
electronic transmissions where some variation between VSS and the speedometer
is normal. Refer to
DTC P0501
in Manual
Transmissions- NV 4500. Diagnostic Aids. |
|
Fuel System Checks
| Check the fuel pressure while the condition exists. Refer
to
Fuel System Diagnosis
.
|
Additional Checks
|
| • | Check the control module grounds for being clean, tight, and in
their proper locations. |
| • | Check the generator output voltage. Repair if less than 9 or more
than 16 volts. |
| • | Check the vacuum lines for kinks or leaks. |
|
