No Response From Tcm - Chrysler PT Cruiser 2001 Service Manual Supplement

COMMUNICATION
Symptom:

*NO RESPONSE FROM TCM

ATTEMPT TO COMMUNICATE WITH THE PCM
FUSED B(+) CIRCUIT TO TCM OPEN
FUSED IGNITION SWITCH OUTPUT (RUN/ST) CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT (START) CIRCUIT OPEN
GROUND CIRCUIT OPEN
PCI BUS CIRCUIT OPEN
OTHER BUS PROBLEMS PRESENT
SCI TRANSMIT CIRCUIT OPEN
TCM (PCI BUS CIRCUIT)
TEST
1 Turn the ignition on.
With the DRB, attempt to communicate with the PCM.
Was the DRB able to communicate with the PCM?
Yes → Go To 2
No
2 With the DRBIII , attempt to read Transmission DTC's.
Does the DRBIII show NO RESPONSE to TCM ?
Yes → Go To 3
No
3 With the DRBIII , check all of the other modules on the vehicle for evidence of a
vehicle bus problem.
Bus related DTC's in other modules point to an overall vehicle bus problem. Other
symptoms such as a customer complaint of intermittent operation of bus controlled
features also indicate a bus problem.
Does the PRNDL display indicate No Bus or is there any evidence of an overall
vehicle bus problem?
Yes → Diagnose and repair other bus problems as necessary.
No
POSSIBLE CAUSES
ACTION
→ Refer to symptom No Response From PCM (SCI Only) in the
Communication category.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
→ Test Complete.
Perform 41TE TRANSMISSION VERIFICATION TEST - VER 1.
→ Go To 4
22
APPLICABILITY
All
All
All