Isuzu 1999 RODEO Workshop Manual page 1394

DTC P0121 –TP System Performance (Cont'd)
Step
9 Check the following items:
1. TP signal circuit for a short to voltage.
2. TP sensor ground circuit for high resistance
between the PCM and the TP sensor.
3. TP sensor ground circuit for a poor connection.
4. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
10 Check the following items:
1. TP signal circuit or 5 volt reference "A" circuit for a
poor connection.
2. TP signal circuit or 5 volt reference "A" circuit for
high resistance between the PCM and the TP
sensor.
3. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
11 Replace the TP sensor.
Is the action complete?
12 Replace the PCM.
IMPORTANT: The
programmed.
Powertrain Control
procedures.
And also refer to latest service bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
—
—
must be
for
—
6E2–151
Yes No
Verify repair Go to Step 12
Verify repair Go to Step 12
Verify repair —
Verify repair —