DTC No. P1C64-29 Start Request Signal failure of OBC

DTC No. P1C64-29: Start Request Signal failure of OBC

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)

On Board Charger (OBC) monitor
EV CAN monitor

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS

Logic Flow Chart

Check Condition A

PHEV-ECU wakeup signal (On Board Charger (OBC)/DC-DC converter): ON
The On Board Charger (OBC)/DC-DC converter power supply voltage is 10.0 to 16.0 volts.

Check Condition B

PHEV-ECU wakeup signal (On Board Charger (OBC)/DC-DC converter): OFF
The On Board Charger (OBC)/DC-DC converter power supply voltage is 10.0 to 16.0 volts.

Judgment Criterion A

The PHEV-ECU wakeup signal (On Board Charger (OBC)/DC-DC converter) is in OFF condition for 1 second or more.

Judgment Criterion B

The PHEV-ECU wakeup signal (On Board Charger (OBC)/DC-DC converter) is in ON condition for 10 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 On Board Charger (OBC)/DC-DC converter

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 On Board Charger (OBC)/DC-DC converter (charge start signal line).

(1) Disconnect the connector, and measure at the wiring harness side.

(2) Measure the voltage between the following terminals.

Voltage between On Board Charger (OBC)/DC-DC converter (No. 2 terminal) and body ground

OK: Battery voltage

Is the check result normal?

2.Check of short to ground circuit and open circuit between On Board Charger (OBC)/DC-DC converter and PHEV-ECU (charge start signal line).

Check the following wiring harness for short to ground circuit and open circuit.

Short to ground circuit and open circuit between On Board Charger (OBC)/DC-DC converter connector (No. 5 terminal) and PHEV-ECU connector (CHGP terminal)

Is the check result normal?

Repair the connector(s) or wiring harness. Then,

3.Voltage measurement at PHEV-ECU connector (CHGP line).

(1) Measure the PHEV-ECU connector (B508) by backprobing.

(2) Change the power supply mode of the electric motor switch to OFF, then wait for 2 minutes or more in key lock condition. (Check that the P indicator on the selector lever turns off.)

(3) After changing the power supply mode of the electric motor switch to ON (READY indicator: OFF), measure the volatge between the following terminals for approximately 3 seconds.

Voltage between PHEV-ECU connector (B508) (CHGP terminal) and body goruind

OK: 1.5 V or less

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?

Replace the On Board Charger (OBC)/DC-DC converter (Refer to ON BOARD CHARGER (OBC) &DC-DC CONVERTER 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

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

). 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?

Retry the troubleshooting.

The procedure is complete.