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DTC No. P0ADB-00 Hybrid/EV Battery Positive Contactor Control Circuit Low
 
 
danger
 
 
MONITOR EXECUTION
Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary 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 Condition
  • The PHEV-ECU power supply voltage is 9.0 V or more.
  • Drive battery positive contactor control circuit activation command: ON
  • The EV power source relay drive signal: ON
Judgment Criterion
  • The drive battery positive contactor control circuit status is in OFF condition.
 
 
OBD-II DRIVE CYCLE PATTERN
 
 
 
 
TROUBLESHOOTING HINTS
  • Damaged wiring harness and connectors
  • Malfunction of the junction box No. 2
  • Malfunction of the PHEV-ECU
 
 
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.Resistance measurement at PHEV-ECU connector (CNT+ terminal)
(1) Disconnect the PHEV-ECU connector (B508), and measure at the wiring harness side.
(2) Measure the resistance between the PHEV-ECU connector (CNT+ terminal) and body ground.
OK: 36 ± 3 Ω [at 23°C (74.3°F)]
Is the check result normal?
 
2.Check of short to ground circuit in CNT+ line between PHEV-ECU and drive battery
Is the check result normal?
Repair the connector(s) or wiring harness.
 
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 main contactor (P) check
danger
  • When checking the high voltage circuit, be sure to fully understand the precautions for handling high voltage vehicle in advance.
  • When checking the high voltage circuit, be sure to wear an insulating protective equipment.
(1) Disassemble the drive battery (Refer to SERVICE PROCEDURE).
(2) Check the junction box No. 2 (Refer to CHECK ON JUNCTION BOX No. 2).
Is the check result normal?
Repair the connector(s) or wiring harness inside the drive battery.
Replace the junction box No. 2 (Refer to JUNCTION BOX NO.2 REMOVAL AND INSTALLATION).
 
5.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?
Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION).
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).