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DTC P1E03: Wakeup Signal Line Open
 
 
 
 
MONITOR EXECUTION
  • Once per driving cycle
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • BMU (SUB) power supply voltage is 8 volts to 16 volts.
  • Time after above conditions satisfy is more than 2 seconds.
  • Propulsion system active continues for 11 seconds.
  • PHEV-ECU wake-up circuit drive request ON.
Judgment Criterion
  • PHEV-ECU wake-up circuit is OFF continues for 3 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Not available
 
 
PROBABLE CAUSES
  • The harness and connector is failed.
  • The PHEV-ECU is failed.
  • The sub-battery management unit [BMU (SUB)] is failed.
 
 
 
 
DIAGNOSIS
Required Special Tools
  • MB991658: Test harness
STEP 1. Measure the voltage at main drive lithium-ion battery connector.
(1) Disconnect the D-34 main drive lithium-ion battery connector, and measure at the wiring harness side.
(2) Check the voltage between the D-34 main drive lithium-ion battery connector (terminal No. 9) and body ground.
OK: Battery voltage
Is the check result normal?
Go to Step 3.
Go to Step 2.
 
STEP 2. Measure the resistance at main drive lithium-ion battery connector.
(1) Disconnect the PHEV-ECU connector.
(2) Disconnect the connector, and measure at the wiring harness side.
(3) Check the resistance between the PHEV-ECU connector (CHGP terminal) and D-34 main drive lithium-ion battery connector (terminal No. 9).
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Replace the PHEV-ECU (Refer to ).
Repair the connector(s) or wiring harness.
 
STEP 3. Measure the voltage at PHEV-ECU connector.
(1) Check the voltage between the PHEV-ECU connector (CHGP terminal) and body ground at the back probing.
(2) During the normal charging.
(3) Select "BMU(SUB)" from System select Screen of the scan tool (M.U.T.-IIISE).
(4) Select the "Special Function" from the sub BMU screen.
(5) Select the "Test" from the Special Function screen
(6) Select the "Item No.2: BAT.heating wakeup signal output" from the Test screen.
OK:
  • Before test performed: Battery voltage
  • After test performed: 0 V
noteWhen the normal charging is completed or the troubleshooting with scan tool (M.U.T.-IIISE) is completed, it returns to before test performed state.
Is the check result normal?
Go to Step 5.
Go to Step 4.
 
STEP 4. Check of open circuit in WKUP line between main drive lithium-ion battery connector and sub-battery management unit [BMU (SUB)] connector.
(1) Remove the battery tray cover (Refer to ).
(2) Disconnect the sub-battery management unit [BMU (SUB)] connector, and measure at the wiring harness side.
(3) Check the resistance between the sub-battery management unit [BMU (SUB)] connector (WKUP terminal) and D-34 main drive lithium-ion battery connector (terminal No. 9).
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Replace the sub-battery management unit [BMU (SUB)] on main drive lithium-ion battery (Refer to ). Then, assemble the main drive lithium-ion battery assembly (Refer to ).
Repair the connector(s) or wiring harness. Then, assemble the main drive lithium-ion battery assembly (Refer to ).
 
STEP 5. Using scan tool (M.U.T.-IIISE), check whether the DTC is set again.
Recheck the DTC.
(1) Erase the DTC.
(2) Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)*.
note*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
(3) Wait for 15 seconds or more.
(4) Check the DTC.
Is the DTC set?
Remove the battery tray cover (Refer to ). Replace the sub-battery management unit [BMU (SUB)] on main drive lithium-ion battery (Refer to ). Then, assemble the main drive lithium-ion battery assembly (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).