Chrysler Crossfire. Manual — part 728
(P0600) IC/HVAC CAN MESSAGE MISSING (CONTINUED)
When Monitored and Set Condition
•
When Monitored: IC CAN-ID received at least once and CAN BUS Circuit DTC is not active.
•
Set Condition: CAN message received from the Instrument Cluster is missing or the IC reports over the CAN
C BUS an SCI BUS message missing from the A/C Heater Control Module.
POSSIBLE CAUSES
CAN BUS CIRCUIT DTC PRESENT
INSTRUMENT CLUSTER DTC PRESENT
A/C HEATER CONTROL MODULE DTC PRESENT
CAN C BUS CIRCUIT OPEN
SERIAL COMMUNICATION CIRCUIT OPEN
A/C HEATER CONTROL MODULE
INSTRUMENT CLUSTER
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 startup 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) IC/HVAC CAN MESSAGE MISSING (CONTINUED)
2.
CHECK TO SEE IF (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.
No
>> Go To 3
3.
CHECK TO SEE IF INSTRUMENT CLUSTER DTC PRESENT
With the ignition on.
With the DRB III
T
, read Instrument Cluster DTCs.
Are any Instrument Cluster DTCs present?
Yes
>> Refer to the Instrument Cluster - Electrical Diagnostics cat-
egory and perform the appropriate symptom.
No
>> Go To 4
4.
CHECK TO SEE IF A/C HEATER CONTROL MODULE DTC PRESENT
With the ignition on.
With the DRB III
T
, read A/C Heater Control Module DTCs.
Are any A/C Heater Control Module DTCs present?
Yes
>> Refer to the Heating & Air Conditioning - Electrical Diag-
nostics category and perform the appropriate symptom.
No
>> Go To 5
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(P0600) IC/HVAC CAN MESSAGE MISSING (CONTINUED)
5.
CAN C BUS (+) OR (-) CIRCUIT(S) OPEN
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the CAN C BUS (+) circuit and the
CAN C BUS (-) circuit in the Instrument Cluster C1 harness connector.
Is the resistance 60 ohms ± 3.0 ohms?
Yes
>> Go To 6
No
>> Repair the faulty CAN C BUS circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
6.
SERIAL COMMUNICATION K1 OR K2 CIRCUIT OPEN
With the ignition off.
Disconnect the A/C Heater Control Module harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Serial Communication K1 and K2 cir-
cuits from the Instrument Cluster C1 harness connector to the A/C
Heater Control Module harness connector.
Is the resistance below 5 ohms for both circuits?
Yes
>> Go To 7
No
>> Repair the Serial Communication circuit(s) for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
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(P0600) IC/HVAC CAN MESSAGE MISSING (CONTINUED)
7.
MODULE REPLACEMENT
Replace the A/C Heater Control Module. (Refer to 24 - HEATING &
AIR CONDITIONING/CONTROLS/HEATER CONTROL - REMOVAL).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
Turn the ignition on.
With the DRB III
T
, read Transmission DTCs.
Did this DTC set again?
Yes
>> Replace the Instrument Cluster. (Refer to 8 - ELECTRI-
CAL/INSTRUMENT CLUSTER - REMOVAL).
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No
>> Test Complete.
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