Pcm Messages Not Received - Jeep KJ Liberty 2005 Service Manual

Symptom:

PCM MESSAGES NOT RECEIVED

When Monitored and Set Condition:
PCM MESSAGES NOT RECEIVED
When Monitored: Ignition On - Continuously
Set Condition: When the ABM detects the PCM is not connected or not functioning
correctly for 10 seconds.
PCM MESSAGES NOT RECEIVED
ATTEMPT TO COMMUNICATE WITH THE PCM
PCI BUS CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST
1 Turn the ignition on.
With the DRBIII , enter Instrument Cluster, System Tests then PCM Monitor.
Does the DRBIII display: PCM is active on BUS?
Yes → Erase the DTC, if DTC resets, measure the resistance of the PCI
No
2 Turn the ignition on.
With the DRBIII , attempt to communicate with the PCM.
Was the DRBIII able to communicate with the PCM?
Yes → Go To 3
No
POSSIBLE CAUSES
ACTION
Bus circuit between the PCM connector and the ABM connector. If
open, repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
→ Go To 2
→ Refer to the communication category and perform the appropriate
symptom.
Perform BODY VERIFICATION TEST - VER 1.
41
BRAKES (25E)
APPLICABILITY
All
All