DTC U3003-16 (VSA Control Unit)

DTC U3003-16  : Electric Parking Brake Control Unit Power Source Circuit (+B) Low Voltage

NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC (VSA)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC
   U3003-16 Electric Parking Brake Control Unit Power Source Circuit (+B) Low Voltage

   Is DTC U3003-16 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

2. VSA modulator-control unit check

   -1. Check and note the parameter (s) below with the HDS.

   Signal	Current conditions
   	Values	Unit
   BATTERY VOLTAGE

   -2. Using a voltmeter, measure and note the voltage across the 12 volt battery terminals.

   NOTE:  If the voltage is below 9.5 V, check the 12 volt battery , and check for any PGM-FI system DTCs .

   -3. Compare the voltage noted in step 2-1 to the voltage in step 2

   Is the difference between the two voltage readings less than 3 V?

   YES 

   Check the 12 volt battery , and check the PGM-FI system DTCs .

   NO 

   Check for loose terminals and poor connections in the VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .