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DTC P0ADB: Main contactor P circuit low
DTC P0ADF: Main contactor N circuit low
cautionBefore replacing the ECU, ensure that the communication circuit is normal.
 
 
 
 
DESCRIPTIONS OF MONITOR METHODS
  • Contactor excitation circuit status is judged by voltage and current of an intelligent power device (IPD) in the PHEV-ECU.
  • Each fail is judged under the following conditions.
    • Main contactor (P) control circuit shorted low: Main contactor (P) control circuit active command on.
    • Main contactor (N) control circuit shorted low: Main contactor (N) control circuit active command on.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored 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 <DTC P0ADB>
Check Conditions <DTC P0ADB>
  • The PHEV-ECU power supply voltage is more than 9.0 volts.
  • The main contactor (P) contactor activation command on.
Judgment Criterion <DTC P0ADB>
  • Judgment signal from intelligent power device (IPD) for main contactor (P) is low for immediately.
Logic Flow Chart <DTC P0ADF>
Check Conditions <DTC P0ADF>
  • The PHEV-ECU power supply voltage is more than 9.0 volts.
  • The main contactor (N) contactor activation command on.
Judgment Criterion <DTC P0ADF>
  • Judgment signal from intelligent power device (IPD) for main contactor (N) is low for 0.3 seconds.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 3 .
 
 
PROBABLE CAUSES
  • Damaged harness or connector.
  • Malfunction of the main contactor (P) or (N).
  • Malfunction of the PHEV-ECU.
 
 
 
DIAGNOSIS
Required Special Tools
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
STEP 1. Check the signal line for short to ground circuit (PHEV-ECU connector and main drive lithium-ion battery connector).
Check the wiring harness between PHEV-ECU connector (terminal CNT+, CNT-) and the main drive lithium-ion battery connector.
Is the check result normal?
Go to Step 2.
Repair the connector or wiring harness. Then go to Step 6.
 
STEP 2. Check the main drive lithium-ion battery main contactor (P) and (N) <On-vehicle check>.
Check resistance of main contactor (P) and (N) coil with harness connector (Refer to GROUP 54Dc - On-vehicle Service, Check on Coil Resistance of Contactor ).
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check the main drive lithium-ion battery main contactor (P) and (N).
(1) Remove the main contactor (Refer to GROUP 54Dc - Main Drive Lithium-ion Battery Disassembly and Assembly, Rear JB Assembly, Rear JB Bus Bars (A, B, C, D, M, N, P and T), Contactor and Fuse Removal and Installation ).
(2) Check the internal resistance in the coil in the main contactors (P) and (N) (Refer to GROUP 54Dc - Main Drive Lithium-ion Battery Disassembly and Assembly, Contactor Check ).
Is the check result normal?
Repair the connector or wiring harness. Then go to Step 6.
Replace the main drive lithium-ion battery main contactor (P) or (N) (Refer to GROUP 54Dc - Main Drive Lithium-ion Battery Disassembly and Assembly, Rear JB Assembly, Rear JB Bus Bars (A, B, C, D, M, N, P and T), Contactor and Fuse Removal and Installation ). Then go to Step 6.
 
STEP 4. Check the signal line for short to ground circuit (main drive lithium-ion battery connector and main contactor).
  • DTC P0ADB: Check the wiring harness between main drive lithium-ion battery connector and the main contactor (P) <CNT+ line>.
  • DTC P0ADF: Check the wiring harness between main drive lithium-ion battery connector and the main contactor (N) <CNT- line>.
Is the check result normal?
Go to Step 5.
Repair the connector or wiring harness. Then go to Step 6.
 
STEP 5. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 3 .
(2) Check the DTC.
Is the DTC set?
Replace the PHEV-ECU (Refer to ). Then go to Step 6.
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
 
STEP 6. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 3 .
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The procedure is complete.