ABS Brake Message

(P0600) ABS BRAKE MESSAGE





When Monitored and Set Condition
- When Monitored: Valid ABS CAN Bus message received at least once and CAN Bus Circuit, ABS CAN Message Missing, ABS CAN Message Incorrect are not active.
- Set Condition: Brake light switch signal not valid - CAB sending invalid value.

POSSIBLE CAUSES
- CAN BUS CIRCUIT DTC PRESENT
- ABS DTCS PRESENT
- CONTROLLER ANTILOCK BRAKE MODULE
- TRANSMISSION CONTROL MODULE

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 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. (P0720) CAN BUS CIRCUIT DTC PRESENT





Turn the ignition on.
With the DRB III*, read Transmission DTCs.
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 ABS DTCS ARE PRESENT





With the ignition on.
With the DRB III*, read ABS DTCs.
Are any ABS or Bus related DTCs present?
Yes>>Refer to the Brakes - ABS Electrical Diagnostics category and perform the appropriate symptom.
No>>Go To 4

4. CAB- BRAKE MESSAGE ERROR





Turn the ignition off.
Replace the Controller Antilock Brake Module.
Turn the ignition on.
With the DRB III*, erase ABS DTCs.
Start the engine.
With the brakes firmly applied, shift the gear selector into drive.
With the DRB III*, read Transmission DTCs.
Did DTC (P0600) ABS BRAKE MESSAGE set again?
Yes>>Replace the Transmission Control Module. Perform NAG1 TRANSMISSION VERIFICATION TEST. Verification Tests
No>>Test Complete.