IC CAN Message Incorrect

(P0600) IC CAN MESSAGE INCORRECT





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 incorrect.

POSSIBLE CAUSES
- CAN BUS CIRCUIT DTC PRESENT
- INSTRUMENT CLUSTER DTCS PRESENT
- CAN C BUS CIRCUIT OPEN
- INSTRUMENT CLUSTER

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*, read the engine DTCs. Check and repair all engine DTCs prior to performing transmission symptom diagnostics.
With the DRB III*, 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: Verify flash level of the transmission controller. Some problems are corrected by software upgrades to the transmission controller.

Note: Check for any Technical Service Bulletins that may apply.

Perform this procedure prior to Symptom diagnosis.
Continue
Go To 2

2. CHECK TO SEE IF (P0720) CAN BUS CIRCUIT DTC PRESENT





Turn the ignition on.
With the DRB III*, read Transmission DTCs.

Note: If DTC (P0720) CAN BUS CIRCUIT is present, perform diagnostics 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*, read Instrument Cluster DTCs.
Are any Instrument Cluster DTCs present?
Yes>>Refer to the Instrument Cluster - Electrical Diagnostics category and perform the appropriate symptom. No>>Go To 4

4. 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>>Replace the Instrument Cluster.
Perform NAG1 TRANSMISSION VERIFICATION TEST. Verification Tests
No>>Repair the faulty CAN C Bus circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST.