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DTC No. P0AC0-00 Current Sensor 1 Offset Diagnosis
 
 
 
 
MONITOR EXECUTION
Once per driving cycle (During the BMU activation)
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • BMU monitor
Sensor (The sensor below is determined to be normal)
  • Drive battery current sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
 
 
Check Condition
  • The BMU power supply voltage is more than 7.578 volts.
  • The vehicle status is in high voltage start.
Judgment Criterion
  • The voltage of the current sensor (wide range) in the junction box No. 2 is 3.30864 volts or more, or 3.172 volts or less.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • Malfunction of the junction box No. 2
  • Malfunction of the BMU
 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
1.Check of PHEV-ECU DTC
Check whether the PHEV-ECU sets the DTC.
Is the DTC set?
Troubleshoot the set DTC (Refer to DIAGNOSTIC TROUBLE CODE CHART). Then,
 
2.Check of other system DTC
Check whether the BMU and BMU2 set the following DTC.
  • DTC No. P1B02-1C: Sensor Power Supply Voltage (AVCC) Diagnosis
  • DTC No. P0A1F-00 ECU Internal Failure
Is the DTC set?
Troubleshoot the set DTCs (Refer to DIAGNOSTIC TROUBLE CODE CHART). Then,
 
3.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
4.Drive battery control wiring harness check (Current sensor power supply line, signal line, ground line)
(1) Disassemble the drive battery (Refer to SERVICE PROCEDURE).
(2) Check the following wiring harness for short to ground circuit.
  • Between the BMU connector (ISENV terminal) and junction box No. 2 connector (terminal No. 3)
  • Between the BMU connector (ISEN1 terminal) and junction box No. 2 connector (terminal No. 7)
(3) Check the following wiring harness for open circuit.
  • Between the BMU connector (ISENV terminal) and junction box No. 2 connector (terminal No. 3)
  • Between the BMU connector (ISEN1 terminal) and junction box No. 2 connector (terminal No. 7)
  • Between the BMU connector (SGND terminal) and junction box No. 2 connector (terminal No. 10)
Is the check result normal?
Repair the connector(s) or wiring harness. Then,
 
5.Drive battery control wiring harness check (Current sensor power supply line, signal line, ground line)
Check the following wiring harness for damage.
  • Between the BMU connector (ISENV terminal) and junction box No. 2 connector (terminal No. 3)
  • Between the BMU connector (ISEN1 terminal) and junction box No. 2 connector (terminal No. 7)
  • Between the BMU connector (SGND terminal) and junction box No. 2 connector (terminal No. 10)
Is the check result normal?
Replace the junction box No. 2 and BMU (Refer to SERVICE PROCEDURE). Then,
Repair the connector(s) or wiring harness. Then,
 
6.Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The procedure is complete.