[Previous][Next]
DTC No. P1B0F-12 HW high stiction diagnosis for waking priority ECU
 
 
 
 
MONITOR EXECUTION
Once per driving cycle [During the power supply mode of the electric motor switch is ON (READY indicator: ON)]
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • BMU monitor
  • EV CAN monitor
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Condition
  • BMU power supply voltage is more than 7.578 volts
  • Vehicle status is in Propulsion system active
  • PHEV-ECU wake-up circuit drive request: ON
Judgment Criterion
  • The PHEV-ECU wake-up circuit status is in OFF condition for 3 seconds or more.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • Malfunction of the PHEV-ECU
  • 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.Voltage measurement at drive battery connector (control wiring harness connector) (PHEV-ECU start request signal voltage)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the voltage of the following.
  • Voltage between the drive battery connector (control wiring harness connector) (terminal No. 20) and body ground
OK: Battery voltage
Is the check result normal?
 
2.Check of PHEV-ECU start request signal line between PHEV-ECU connector and drive battery connector (control wiring harness connector)
Check the following for open circuit.
  • Open circuit between the PHEV-ECU connector (WKUP terminal) and drive battery connector (control wiring harness connector) (terminal No. 20)
Is the check result normal?
Repair the connector(s) or wiring harness. Then,
 
3.Voltage measurement at PHEV-ECU connector (PHEV-ECU start request signal voltage)
(1) Measure the PHEV-ECU connector side by backprobing.
(2) Measure the voltage of the following.
  • Voltage between the PHEV-ECU connector (WKUP terminal) and body ground
OK <4 seconds after the power supply mode of the electric motor switch is changed to ON (READY indicator: ON)>: 1 V or less
OK <Other than above>: Battery voltage
Is the check result normal?
 
4.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).
 
5.Drive battery control wiring harness check (PHEV-ECU start request signal line)
(1) Disassemble the drive battery (Refer to SERVICE PROCEDURE).
(2) Check the following wiring harness for open circuit.
  • Between the BMU connector (terminal No. 17) and the drive battery connector (control wiring harness connector) (terminal No. 20)
Is the check result normal?
Replace the BMU (Refer to BATTERY MANAGEMENT UNIT (BMU) REMOVAL AND INSTALLATION). 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?
Repalce the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION). hen,
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).
 
7.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.