DTC No. P1B10-11 HW low stiction diagnosis for waking priority ECU

MONITOR EXECUTION

Once per driving cycle

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

BMU power supply voltage is more than 7.578 volts
The vehicle status is in propulsion system active condition.
PHEV-ECU wake-up circuit drive request: OFF
Monitoring DTC No. P1B0F is completed.

Judgment Criterion

PHEV-ECU wake-up circuit status is in ON condition for 4 seconds or more.

OBD-II DRIVE CYCLE PATTERN

Refer to OBD-II Drive Cycle OBD-II DRIVE CYCLE.

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 short to ground circuit.

Short to ground 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.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

). Then,

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.Check of other system data list

(1) Disconnect the drive battery connector (control wiring harness connector).

(2) Check the following PHEV-ECU data list item.

Item No. 1110: Connection status signal from BMS

OK: OFF

Is the check result normal?

Replace the PHEV-ECU (Refer to PHEV-ECU REMOVAL AND INSTALLATION

). Then,

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?

6.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 short to ground 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,

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.