Chrysler Crossfire. Manual — part 724
(P0600) ENGINE CAN MESSAGE MISSING (CONTINUED)
When Monitored and Set Condition
•
When Monitored: CAN BUS Circuit error not present 1 second after ignition on and not in Park or Neutral, no
System Overvoltage or System Undervoltage conditions present, or transmission in Park or Neutral and engine
RPM greater than 850 RPM.
•
Set Condition: This DTC is set if a CAN ID was not received in the required time from the Powertrain Control
Module.
POSSIBLE CAUSES
CAN BUS CIRCUIT DTC PRESENT
ENGINE DTCS PRESENT
CAN C BUS +/- CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TRANSMISSION CONTROL MODULE
For a complete Transmission Control Module Circuit Diagram, (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTO-
MATIC - NAG1 - SCHEMATICS AND DIAGRAMS).
For a complete CAN BUS Circuit Diagram, (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
SCHEMATICS AND DIAGRAMS).
Diagnostic Test
1.
PRE-DIAGNOSTIC CHECK OUT
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 in accordance with the Service
Information.
Note: Always perform diagnostics with a fully charged battery to
avoid false symptoms.
With the DRB III
T
, read Engine DTCs. Check and repair all engine
DTCs prior to performing transmission symptom diagnostics.
With the DRB III
T
, read and record all Transmission DTCs.
Note: Check connectors - Clean/repair as necessary. Poor pin to
terminal connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and
connectors. Repair as necessary.
Most DTCs set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run.
Note: Check for any Technical Service Bulletins that may apply.
Perform this procedure prior to Symptom diagnosis.
Continue
Go To 2
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NAG1 - ELECTRICAL DIAGNOSTICS
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(P0600) ENGINE CAN MESSAGE MISSING (CONTINUED)
2.
(P0720) CAN BUS CIRCUIT DTC PRESENT
Turn the ignition on.
With the DRB III
T
, read Transmission DTCs.
Note: If DTC (P0720) CAN BUS CIRCUIT is present, perform diag-
nostics on that symptom first.
Is DTC (P0720) CAN BUS CIRCUIT present?
Yes
>> Refer to the Transmission - Electrical Diagnostics category
and perform the appropriate symptom.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>>
Go To 3
3.
CHECK TO SEE IF ENGINE DTCS ARE PRESENT
With the ignition on.
With the DRB III
T
, read Engine DTCs.
Are any performance or BUS related Engine DTCs present?
Yes
>> Refer to the Engine - Electrical Diagnostics category and
perform the appropriate symptom.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>>
Go To 4
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NAG1 - ELECTRICAL DIAGNOSTICS
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(P0600) ENGINE CAN MESSAGE MISSING (CONTINUED)
4.
CAN C BUS +/- CIRCUIT OPEN
Turn the ignition off.
Disconnect the PCM C4 harness connector.
Disconnect the TCM C3 harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the CAN C BUS (+) circuit from the PCM
C4 harness connector to the TCM C3 harness connector.
Measure the resistance of the CAN C BUS (-) circuit from the PCM C4
harness connector to the TCM C3 harness connector.
Is the resistance below 5.0 ohms on both circuits?
Yes
>> Go To 5
No
>> Repair the CAN C BUS circuit(s) that measured above 5.0
ohms for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
5.
PCM - ENGINE CAN MESSAGE MISSING
With the ignition off.
Reconnect the TCM C3 harness connector.
Replace and program the Powertrain Control Module. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/POWERTRAIN
CONTROL MODULE - REMOVAL).
With the DRB III
T
, erase Transmission DTCs.
Start the engine.
With the brakes firmly applied, shift the gear selector into Drive.
With the DRB III
T
, read Transmission DTCs.
Did DTC (P0600) ENGINE CAN MESSAGE MISSING set again?
Yes
>> Replace the Transmission Control Module. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
TRANSMISSION CONTROL MODULE - REMOVAL).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>> Test Complete.
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(P0600) ENGINE RPM MESSAGE
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NAG1 - ELECTRICAL DIAGNOSTICS
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