Pinpoint Test I: DTC U0140: 00

I1 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?
  - YES : GO to I2.
  - No : The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
I2 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a scan tool, carry out the network test.
- Does the BCM pass the network test?
  - YES : GO to I3.
  - No : REFER to MODULE COMMUNICATIONS NETWORK .
I3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE AND BCM SELF-TESTS
- Check for recorded ABS module and BCM DTCs from the network test.
- Is DTC U3003: 16 (or B1318) or DTC U3003: 17 (or B1317) recorded?
  - YES : For the ABS module, REFER to DTC Charts .
    For the BCM, REFER to MULTIFUNCTION ELECTRONIC MODULES .
  - No : GO to I4.
I4 CHECK FOR DTC U0140: 00 SET IN OTHER MODULES
- Using a scan tool, clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test - All CMDTCs.
- Is DTC U0140: 00 or DTC U0140 set in more than one module?
  - YES : INSTALL a new BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation. CLEAR the DTCs. REPEAT the ABS module self-test
  - No : For vehicles without adaptive cruise control, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . TEST the system for normal operation.
    For vehicles with adaptive cruise control, INSTALL a new HCU. REFER to Hydraulic Control Unit (HCU) .