DTC Troubleshooting: U0122 (184-1)

DTC U0122: F-CAN Malfunction (VSA Control Unit) NOTE: If the DTC U0122 and U0423 is stored at the same time as DTC U0073, troubleshooting DTC U0073 first, then recheck for DTC U0122 and U0423.

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

1. Turn the ignition switch OFF.

1. Turn the ignition switch ON (II).

1. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U0122 indicated?

YES | - | Go to Step 6 .
NO | - | Intermittent failure, system is OK at this time.■

1. Check for VSA system DTCs with the HDS.

Is VSA DTC 86 indicated?

YES | - | Go to Step 7 .
NO | - | Go to Step 10 .

1. Turn the ignition switch OFF.

1. Disconnect the VSA control unit 47P connector.

1. Check for continuity between VSA control unit 47P conector terminals No. 2 and No. 19.

Is there continuity?

YES | - | Substitute a known-good VSA control unit, then go to Step 15 and recheck. If no DTCs are indicated, replace the original VSA control unit, then go to Step 15 .
NO | - | Repair open in the wire between VSA control unit 47P connector terminal No. 19 (No. 2) * and ECM connector No. 2 terminal No. 47 (No. 48) * , then go to Step 15 .

1. Turn the ignition switch OFF.

1. Disconnect the VSA control unit 47P connector.

1. Turn the ignition switch ON (II).

1. Measure voltage between VSA control unit 47P connector terminal No. 13 and body ground.

Is there voltage?

YES | - | Go to Step 14 .
NO | - | Check No. 18 ACG (15 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between No. 18 ACG (15 A) fuse and the VSA control unit, then go to Step 15 .

1. Check for continuity between VSA control unit 47P connector terminal No. 32 and body ground.

Is there voltage?

YES | - | Substitute a known-good VSA control unit, then go to Step 15 and recheck. If no DTCs are indicated, replace the original VSA control unit, then go to Step 15 .
NO | - | Repair open in the wire between the VSA control unit and G202, then go to Step 15 .

1. Turn the ignition switch ON (II).

1. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC U0122 is indicated, check for poor connections or loose terminals at the VSA control unit and the ECM, the go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■