BUS (+) & (-) Open; BUS (+) Open; BUS (-) Open; No BUS Bias
NOTE:
Perform body verification test after each repair. See BODY VERIFICATION TEST under VERIFICATION TESTS.
NOTE:
Ignition off during BUS test is most common cause for this message.
- If ignition was off during BUS test, turn ignition on and perform body verification test. See BODY VERIFICATION TEST under VERIFICATION TESTS. If ignition was on during BUS test, go to next step.
- Using DVOM, backprobe DLC connector terminals. Measure voltage between ground and DLC terminal No. 3 (Violet/Gray wire on Breeze, Cirrus and Stratus; Violet/Brown wire on Sebring Convertible). See Fig 1. If voltage is 2.3-2.6 volts, go to next step. If voltage is not 2.3-2.6 volts, go to step 5.
- Measure voltage between ground and DLC terminal No. 11 (White/Dark Green wire on Breeze, Cirrus and Stratus; White/Dark Blue wire on Sebring Convertible). If voltage is 2.3-2.6 volts, go to next step. If voltage is not 2.3-2.6 volts, go to step 5.
- Scan tool or communication cable is defective. Replace scan tool communication cable or scan tool.
- Access Body Control Module (BCM) connector C3. BCM is connected to junction block. Using a jumper wire, backprobe between ground and BCM 22-pin connector C3 terminal No. 3 (Violet/Gray wire) on Breeze, Cirrus and Stratus or terminal No. 1 (Violet/Brown wire) on Sebring Convertible. See CONNECTOR IDENTIFICATION . Using scan tool, select BODY, BODY COMPUTER, SYSTEM TEST. Using scan tool, perform CCD BUS test. If scan tool displays BUS SHORT TO GROUND, go to next step. If scan tool does not display BUS SHORT TO GROUND, repair open in Violet/Gray or Violet/Brown wire. See WIRING DIAGRAMS .
- Move jumper wire to BCM 22-pin connector C3, terminal No. 13 (White/Dark Green wire) on Breeze, Cirrus and Stratus or terminal No. 11 (White/Dark Blue wire) on Sebring Convertible. Perform CCD BUS test. If scan tool displays BUS SHORT TO GROUND, go to next step. If scan tool does not display BUS SHORT TO GROUND, repair open in White/Dark Green or White/Dark Blue wire.NOTE: The resistance measurement in next 2 steps are performed at BCM connector terminals on BCM and not at BCM connectors.
- Turn ignition off. Disconnect scan tool from DLC. Disconnect BCM from junction block. Using DVOM, measure resistance between BCM pins CCD BUS (+) and (-) terminals for 22-pin connector C3. See CONNECTOR IDENTIFICATION . If resistance is 100-140 ohms on all circuits, go to next step. If resistance is not 100-140 ohms on all circuits, replace BCM. See BODY CONTROL MODULE (BCM) under REMOVAL & INSTALLATION.
- Measure resistance between BCM pins CCD BUS (+) and (-) terminals for 14-pin connector C1. See CONNECTOR IDENTIFICATION . If resistance is 100-140 ohms on all circuits, go to next step. If resistance is not 100-140 ohms on all circuits, replace BCM.
- Turn ignition on. Using DVOM, measure voltage between ground and BCM internal 12-pin connector terminals No. 2 and 12. See CONNECTOR IDENTIFICATION . If voltage is greater than 10 volts, go to next step. If voltage is 10 volts or less, repair open in fused B+ circuit/junction block. See WIRING DIAGRAMS .
- Using DVOM, measure voltage between ground and BCM internal 12-pin connector terminal No. 6. If voltage is greater than 10 volts, go to next step. If voltage is 10 volts or less, repair open in fused ignition switch output circuit as needed. See WIRING DIAGRAMS .
- Turn ignition off. Using DVOM, measure resistance between ground and BCM internal 12-pin connector terminal No. 10. If resistance is 15 ohms or more, repair open in ground circuit/junction block. See WIRING DIAGRAMS . If resistance is less than 15 ohms, replace BCM.