Symptom:
P0884-POWER UP AT SPEED
When Monitored and Set Condition:
P0884-POWER UP AT SPEED
When Monitored:
When Transmission Control Module powers up.
Set Condition:
This DTC will set if the TCM powers up and senses the vehicle in a valid
forward gear (no PRNDL DTCs) with a output speed above 800 RPM (approximately
32Km/h or 20 MPH).
POSSIBLE CAUSES
POWER UP AT SPEED
TEST
ACTION
APPLICABILITY
1
This DTC is set when the TCM is initialized while the vehicle is moving down the
road in a valid forward gear.
Check all of the Fused B+, Fused Ignition Switch Output, and Ground circuits to the
TCM for an intermittent open or short to ground.
With the DRBIII
t, check the EATX EVENT DATA to help identify the conditions in
which the DTC was set.
Were there any problems found?
All
Yes
→ Repair wiring and/or connectors as necessary.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
No
→ Go To 2
2
NOTE: Low fluid level can be the cause of many Transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII
t, read the engine DTC’s. Check and repair all engine DTC’s prior
to performing Transmission Symptom Diagnostics.
With the DRBIII
t, read Transmission DTC’s. Record all DTC’s and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC’s, check and record all CVI’s.
Most DTC’s set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Transmission Control Module. Some problems
are corrected by software upgrades to the Transmission Control Module.
NOTE: Check for applicable TSB’s related to the symptom.
Perform this procedure prior to Symptom diagnosis.
All
Continue
Test Complete.
107
TRANSMISSION - EATX