DTC U0155: F-CAN Malfunction (Battery Condition Monitor Module-Gauge Control Module) (106) (Battery Condition Monitor Module) (2014-15)
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| U0155 F-CAN Malfunction (Battery Condition Monitor Module - Gauge Control Module) |
DTCs (HEV)
- Problem verification
- 1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame U0155 F-CAN Malfunction (Battery Condition Monitor Module - Gauge Control Module) Is DTC U0155 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery condition monitor module and the gauge control module.
- CAN gateway system DTCs check
- 1. Check for CAN gateway system DTCs with the HDS.
DTC Description DTC U0029-00 CAN Gateway F-CAN ch A Buss Off U0047-00 CAN Gateway F-CAN ch B Buss Off U0056-00 CAN Gateway F-CAN ch C Buss Off U3000-49 CAN Gateway Internal Failure Are any DTCs indicated?
YES
Go to the indicated DTC's troubleshooting.
NO
Go to step 3.
- F-CAN circuit communication check
- 1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Units Check.
Which result is indicated?
Battery Condition Monitor Module and PCU are Detected
Intermittent failure, the system is OK at this time.
Battery Condition Monitor Module (Bus A) is Not Available
Go to step 4.
PCU (Bus A) is Not Available
Go to step 5.
- Open wire check (F-CAN A lines)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Do the 12 volt battery terminal disconnection procedure.
- 3. Disconnect the following connectors.
CAN gateway 24P connector - Refer to: CAN Gateway Removal and Installation (2014-15) Battery condition monitor module connector C (40P) - Refer to: Battery Condition Monitor Module Removal and Installation (2014-15) - 4. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode Battery condition monitor module connector C (40P): disconnected
CAN gateway 24P connector: disconnected Test circuit F-CAN A_H Test point 1 CAN gateway 24P connector No. 14 (WHT) Test point 2 Battery condition monitor module connector C (40P) No. 30 (WHT) Test circuit F-CAN A_L Test point 1 CAN gateway 24P connector No. 15 (RED) Test point 2 Battery condition monitor module connector C (40P) No. 10 (RED) Is there continuity?
YES
The F-CAN A wires are OK. Update the battery condition monitor module if it does not have the latest software, then recheck. If the DTC U0155 goes away and the battery condition monitor module was updated, troubleshooting is complete. If the DTC U0155 goes away and the battery condition monitor module was substituted, replace the original battery condition monitor module - Refer to: Battery Condition Monitor Module Removal and Installation (2014-15) .
NO
Repair an open or poor connection in the F-CAN A wires between the CAN gateway and the battery condition monitor module.
- Open wire check (F-CAN A lines)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
CAN gateway 24P connector - Refer to: CAN Gateway Removal and Installation (2014-15) Gauge control module connector A (32P) - 3. Check for continuity between test points 1 and 2 respectively.
Test condition Vehicle OFF (LOCK) mode CAN gateway 24P connector: disconnected
Gauge control module connector A (32P): disconnected
Test circuit F-CAN A_H Test point 1 CAN gateway 24P connector No. 14 (WHT) Test point 2 Gauge control module connector A (32P) No. 19 (WHT) Test circuit F-CAN A_L Test point 1 CAN gateway 24P connector No. 15 (RED) Test point 2 Gauge control module connector A (32P) No. 20 (RED) Is there continuity?
YES
The F-CAN A wires are OK. Substitute a known-good gauge control module .
NO
Repair an open or poor connection in the F-CAN A wires between the CAN gateway and the gauge control module.