Caravane 2002 3

Caravane 2002 3.3 4 speed transmission
Code error: p0725
I
I did all this test with Mitchelle see below:

1. Using scan tool, read PCM DTCs. See appropriate SELF-DIAGNOSTICS article in ENGINE
PERFORMANCE. If any crankshaft position sensor DTCs are present, diagnose and repair fault
before proceeding. If no crankshaft position sensor DTCs are present, go to next step.
2. Using scan tool, check STARTS SINCE SET counter. If counter is not set to zero, go to step 8. If
counter is set to zero, go to next step.
3. Turn ignition off. Disconnect TCM and PCM harness connectors. Measure resistance of
crankshaft position sensor signal circuit between TCM and PCM harness connectors. See
WIRING DIAGRAMS. If resistance is less than 5 ohms, go to next step. If resistance is not less
than 5 ohms, repair open in crankshaft position sensor signal circuit.
4. Measure resistance between ground and terminal No. 6 (crankshaft position sensor signal circuit)
at TCM harness connector. If resistance is less than 5 ohms, repair crankshaft position sensor
signal circuit for short to ground. If resistance is not less than 5 ohms, go to next step.
5. Connect TCM harness connector. Ensure PCM harness connector is disconnected. Turn ignition
on. Measure voltage between ground and crankshaft position sensor signal terminal at appropriate
PCM harness connector. See WIRING DIAGRAMS. If voltage is 10 volts or less, go to next
step. If voltage is greater than 10 volts, repair crankshaft position sensor signal circuit for short to
voltage.
6. Measure voltage between PCM harness connector ground and crankshaft position sensor signal
terminals. Ensure ignition is on. If voltage is 4.5-5.5 volts, replace PCM. See appropriate
REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. If voltage
is not 4.5-5.5 volts, go to next step.
7. If not problems have been found, replace TCM. See TRANSMISSION CONTROL MODULE
under REMOVAL & INSTALLATION. Perform SHIFT QUALITY QUICK-LEARN
PROCEDURE and PINION FACTOR PROCEDURE under PROGRAMMING.
8. Conditions needed to set DTC P0725 are currently not present. Perform wiggle test to diagnose
intermittent or poor connections. Repair as needed. If no problems are found, testing is complete.

At Etape 6 I have 4.9 volt and ask to me to change PCM. But I have to say the Tcm is very rusty I know a specialist in transmission he saids to me change the Tcm but the test said change the Pcm. Wath do thing about this is it neccessay to change the Pcm and the Tcm? I hope you understand my english I speak french.

Tank you
Jean-Marc Charron