No CAN Message From CAB Module
P0600 - NO CAN MESSAGE FROM CAB MODULEP0600 - No CAN Message From CAB Module:
WHEN MONITORED
With the ignition on.
SET CONDITION
This DTC is set when a CAN ID is not received in the required time from the Controller Antilock Brake (CAB).
POSSIBLE CAUSES
- CAN C BUS (+)/(-) circuit open
- CAN C BUS (+)/(-) circuit short to ground
- CAN C BUS (+)/(-) LOW circuit short to voltage
- Sentry key remote entry module
- Controller antilock brake
- Powertrain control module
DIAGNOSTIC TEST
1. CHECK TO SEE IF CAB DTCS ARE PRESENT
Turn ignition on.
With the DRB III(R), read CAB DTCs.
Q: Are any performance or BUS related DTCs present?
YES: Repair all CAB DTCs before proceeding.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
NO: Go To 2
2. VERIFY DTCS
With the ignition on.
With the DRB III(R), erase PCM DTCs.
Turn the ignition off, then back on.
Monitor the DRB III(R) for this DTC.
Q: Did the DTC, (P0600) NO CAN MESSAGE FROM CAB MODULE, set again?
YES: Go To 3
NO: Go To 12
3. PCM AND SKREEM CAN C BUS TERMINATION
Turn the ignition off.
Measure the resistance of the PCM CAN C BUS termination by backprobing between the CAN C BUS (+) circuit and the CAN C BUS (-) circuit at the PCM C4 harness connector.
Q: Is the resistance between 50 and 70 ohms?
YES: Go To 11
NO: Go To 4
4. PCM CAN C BUS TERMINATION
With the ignition off.
Disconnect the PCM C4 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the SKREEM CAN C BUS termination by backprobing between the CAN C BUS (+) circuit and the CAN C BUS (-) circuit at the PCM C4 harness connector.
Q: Is the SKREEM CAN C BUS termination resistance between 110 and 130 ohms?
YES: Replace and program the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
NO: Go To 5
5. SKREEM TERMINATION
With the ignition off.
Measure the resistance of the SKREEM CAN C BUS termination by backprobing between the CAN C BUS (+) circuit and the CAN C BUS (-) circuit at the SKREEM C2 harness connector.
Q: Is the resistance between 110 and 130 ohms?
YES: Go To 6
NO: Replace the Sentry Key Remote Entry Module.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
6. CAN C BUS (-) CIRCUIT OPEN
With the ignition off.
Disconnect the SKREEM C2 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the CAN C BUS (-) circuit from the SKREEM C2 harness connector to the PCM C4 harness connector.
Q: Is the resistance below 5.0 ohms?
YES: Go To 7
NO: Repair the CAN C BUS (-) circuit for an open.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
7. CAN C BUS (+) CIRCUIT OPEN
With the ignition off.
Measure the resistance of the CAN C BUS (+) circuit from the PCM C4 harness connector to the SKREEM C2 harness connector.
Q: Is the resistance below 5.0 ohms?
YES: Go To 8
NO: Repair the CAN C BUS (+) circuit for an open.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
8. CAN C BUS (+) CIRCUIT SHORT TO VOLTAGE
Turn the ignition on.
Measure the voltage of the CAN C BUS (+) circuit at the PCM C4 harness connector.
Q: Is the voltage below 1.0 volt?
YES: Go To 9
NO: Repair the CAN C BUS (+) circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
9. CAN C BUS (-) CIRCUIT SHORT TO VOLTAGE
With the ignition on.
Measure the voltage of the CAN C BUS (-) circuit at the PCM C4 harness connector.
Q: Is the voltage below 1.0 volt?
YES: Go To 10
NO: Repair the CAN C BUS (-) circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
10. CAN C BUS (-) CIRCUIT SHORT TO GROUND
Turn the ignition off.
Measure the resistance between ground and the CAN C BUS (-) circuit.
Q: Is the resistance above 100 kohms?
YES: Repair the CAN C BUS (+) circuit for a short to ground.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
NO: Repair the CAN C BUS (-) circuit for a short to ground.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
11. CAN C BUS (-) CIRCUIT OPEN FROM CAB TO PCM
With the ignition off.
Disconnect the CAB harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the CAN C BUS (-) circuit from the CAB harness connector to the PCM C4 harness connector.
Q: Is the resistance below 5.0 ohms?
YES: Repair the CAN C BUS (+) circuit for an open between the PCM C4 harness and the CAB harness connector.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
NO: Repair the CAN C BUS (-) circuit for an open between the PCM C4 harness and the CAB harness connector.
Perform POWERTRAIN VERIFICATION TEST - VER 2. Powertrain Verification Test - Ver 2
12. INTERMITTENT WIRING AND CONNECTORS
The condition that caused this DTC to set is currently not present. Inspect the related Wiring harness for a possible intermittent condition.
NOTE:
- Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs.
- Check for any Technical Service Bulletins that may apply.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors Specific to this DTC. Wiggle the Wires while checking for shorts and/or open circuits.
Q: Were there any problems found?
YES: Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER. Verification Tests
NO: The condition that caused this DTC to set is currently not present. Inspect the Related wiring harness for a possible intermittent condition.