DTC No. U1E32-08 LIN Communication malfunction with PHEV-ECU

DTC No. U1E32-08 LIN Communication malfunction with PHEV-ECU
DTC No. U1E3A-83 LIN Communication error with PHEV-ECU

DTC SET CONDITION

Check Condition

IGCT power supply is ON for 5 seconds or more

Judgment Criterion

Malfunction on the LIN communication with the PHEV-ECU is detected.

TROUBLESHOOTING HINTS

Malfunction of the LIN bus line
Malfunction of the PHEV-ECU
Malfunction of the power drive unit

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.M.U.T.-IIISE other DTC check

Check whether the DTC, which has the higher priority than this DTC, is set. (Refer to DTC Inspection Priority Chart

Is the DTC set?

Troubleshoot the set DTC (Refer to DIAGNOSTIC TROUBLE CODE CHART

2.Voltage measurement at power drive unit connector (MLIN terminal)

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

(2) Disconnect the PHEV-ECU connector (E348) and electric oil pump connector.

caution

Check that there is no foreign material inside the connector, and check the inappropriate connection of the connector and break of the pin.

(3) Change the power supply mode of the electric motor switch to ON (READY indicator: OFF).

(4) Measure the voltage between the power drive unit connector (MLIN terminal) and body ground.

OK: No voltmeter reading

Is the check result normal?

Repair the connector(s) or wiring harness in MLIN line between the power drive unit, electric oil pump and PHEV-ECU.

3.Check of continuity at power drive unit connector (MLIN terminal)

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

(2) Disconnect the PHEV-ECU connector (E348) and electric oil pump connector.

caution

Check that there is no foreign material inside the connector, and check the inappropriate connection of the connector and break of the pin.

(3) Check the following wiring harnesses for continuity.

Continuity between the power drive unit connector (MLIN terminal) and body ground
OK: No continuity
Continuity between the power drive unit connector (MLIN terminal) and PHEV-ECU connector (LIN1 terminal)
OK: Continuity exists (2 Ω or less)

Is the check result normal?

Repair the connector(s) or wiring harness in MLIN line between the power drive unit, electric oil pump and PHEV-ECU.

4.Check whether the DTC is set again.

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

5.Check whether the DTC is set again.

Is the DTC set?

Replace the power drive unit (Refer to POWER DRIVE UNIT REMOVAL AND INSTALLATION

The procedure is complete.