DTC P0B0B:00 [TCM (SJ6A-EL)]

id0502o1835300

DTC P0B0B:00

Electric AT oil pump: Electric AT oil pump driver relay ON stuck

DETECTION CONDITION

•  Vehicle condition: While ignition is switched OFF

•  Status: Detected electric AT oil pump driver relay ON stuck

•  Period: Confirmed 5 times continuously in 0.1 s or more

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

•  TCM connector or terminal malfunction

•  Electric AT oil pump driver relay malfunction

•  Short to power supply in wiring harness between electric AT oil pump driver relay terminal C and electric AT oil pump driver control unit terminal A

•  Short to ground in wiring harness between electric AT oil pump driver relay terminal E and TCM terminal 1Y

•  Electric AT oil pump driver control unit connector or terminal malfunction

•  Electric AT oil pump driver control unit malfunction

•  TCM malfunction

DTC P0B0B:00	Electric AT oil pump: Electric AT oil pump driver relay ON stuck
DETECTION CONDITION	• Vehicle condition: While ignition is switched OFF • Status: Detected electric AT oil pump driver relay ON stuck • Period: Confirmed 5 times continuously in 0.1 s or more
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	• TCM connector or terminal malfunction • Electric AT oil pump driver relay malfunction • Short to power supply in wiring harness between electric AT oil pump driver relay terminal C and electric AT oil pump driver control unit terminal A • Short to ground in wiring harness between electric AT oil pump driver relay terminal E and TCM terminal 1Y • Electric AT oil pump driver control unit connector or terminal malfunction • Electric AT oil pump driver control unit malfunction • TCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

Note

•  Recording can be facilitated using the screen capture function of the PC.

•  Record the freeze frame data/snap shot data.

—

Go to the next step.

2

VERIFY RELATED SERVICE INFORMATION AVAILABILITY

•  Verify related Service Information availability.

•  Is any related Service Information available?

Yes

Perform repair or diagnosis according to the available Service Information.

•  If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

INSPECT TCM CONNECTOR

•  Switch the ignition off.

•  Disconnect the TCM connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is there any malfunctioning location?

Yes

Repair or replace the connector/terminal, then go to Step 9.

No

Go to the next step.

4

INSPECT ELECTRIC AT OIL PUMP DRIVER RELAY

•  Remove the electric AT oil pump driver relay.
(See RELAY LOCATION.)

•  Inspect the electric AT oil pump driver relay.
(See RELAY INSPECTION.)

•  Is there any malfunctioning location?

Yes

Replace the electric AT oil pump driver relay, then go to Step 9.

(See RELAY LOCATION.)

No

Go to the next step.

5

INSPECT FOR SHORT TO POWER SUPPLY IN ELECTRIC AT OIL PUMP DRIVER RELAY CIRCUIT

•  Connect the TCM connector.

•  Start the engine.

•  Measure the voltage between the electric AT oil pump driver relay terminal C (vehicle wiring harness side) and body ground before/after operating i-stop.

•  Is the voltage B+ constantly?

Yes

Refer to the wiring diagram and verify if there is a common connector between electric AT oil pump driver control unit terminal A and electric AT oil pump driver relay terminal C.

If there is a common connector:

•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location.

•  Repair or replace the malfunctioning location.

If there is no common connector:

•  Repair or replace the wiring harness which is shorted to the power supply.

Go to Step 9.

No

Go to the next step.

6

INSPECT FOR SHORT TO GROUND IN ELECTRIC AT OIL PUMP DRIVER RELAY CIRCUIT

•  Disconnect the TCM connector.

•  Inspect for continuity between TCM terminal 1Y (vehicle wiring harness side) and body ground.

•  Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between TCM terminal 1Y and electric AT oil pump driver relay terminal E.

If there is a common connector:

•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.

•  Repair or replace the malfunctioning location.

If there is no common connector:

•  Repair or replace the wiring harness which is shorted to ground.

Go to Step 9.

No

Go to the next step.

7

INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT CONNECTOR

•  Switch the ignition off.

•  Disconnect the electric AT oil pump driver control unit connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is there any malfunctioning location?

Yes

Repair or replace the connector/terminal, then go to Step 9.

No

Go to the next step.

8

INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT

•  Inspect the electric AT oil pump driver control unit.
(See ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT INSPECTION [SJ6A-EL].)

•  Is the electric AT oil pump driver control unit normal?

Yes

Go to the next step.

No

Replace the electric AT oil pump driver control unit, then go to the next step.

(See ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT REMOVAL/INSTALLATION [SJ6A-EL].)

9

VERIFY SAME DTC IS NOT PRESENT

•  Clear DTC for the TCM using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

•  Perform the DTC inspection for the TCM using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

•  Is the same DTC present?

Yes

Repeat the inspection from Step 1.

If the malfunction recurs, replace the TCM, then go to the next step.

(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)

No

Go to the next step.

10

VERIFY DTC TROUBLESHOOTING COMPLETED

•  Clear the DTC using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

•  Perform the DTC inspection using the M-MDS.
(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

•  Are any DTCs present?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the freeze frame data/snap shot data.	—	Go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT TCM CONNECTOR • Switch the ignition off. • Disconnect the TCM connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunctioning location?	Yes	Repair or replace the connector/terminal, then go to Step 9.
3		No	Go to the next step.
4	INSPECT ELECTRIC AT OIL PUMP DRIVER RELAY • Remove the electric AT oil pump driver relay. (See RELAY LOCATION.) • Inspect the electric AT oil pump driver relay. (See RELAY INSPECTION.) • Is there any malfunctioning location?	Yes	Replace the electric AT oil pump driver relay, then go to Step 9. (See RELAY LOCATION.)
4		No	Go to the next step.
5	INSPECT FOR SHORT TO POWER SUPPLY IN ELECTRIC AT OIL PUMP DRIVER RELAY CIRCUIT • Connect the TCM connector. • Start the engine. • Measure the voltage between the electric AT oil pump driver relay terminal C (vehicle wiring harness side) and body ground before/after operating i-stop. • Is the voltage B+ constantly?	Yes	Refer to the wiring diagram and verify if there is a common connector between electric AT oil pump driver control unit terminal A and electric AT oil pump driver relay terminal C. If there is a common connector: • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location. • Repair or replace the malfunctioning location. If there is no common connector: • Repair or replace the wiring harness which is shorted to the power supply. Go to Step 9.
5		No	Go to the next step.
6	INSPECT FOR SHORT TO GROUND IN ELECTRIC AT OIL PUMP DRIVER RELAY CIRCUIT • Disconnect the TCM connector. • Inspect for continuity between TCM terminal 1Y (vehicle wiring harness side) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between TCM terminal 1Y and electric AT oil pump driver relay terminal E. If there is a common connector: • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. • Repair or replace the malfunctioning location. If there is no common connector: • Repair or replace the wiring harness which is shorted to ground. Go to Step 9.
6		No	Go to the next step.
7	INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT CONNECTOR • Switch the ignition off. • Disconnect the electric AT oil pump driver control unit connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunctioning location?	Yes	Repair or replace the connector/terminal, then go to Step 9.
7		No	Go to the next step.
8	INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT • Inspect the electric AT oil pump driver control unit. (See ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT INSPECTION [SJ6A-EL].) • Is the electric AT oil pump driver control unit normal?	Yes	Go to the next step.
8		No	Replace the electric AT oil pump driver control unit, then go to the next step. (See ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT REMOVAL/INSTALLATION [SJ6A-EL].)
9	VERIFY SAME DTC IS NOT PRESENT • Clear DTC for the TCM using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) • Perform the DTC inspection for the TCM using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [SJ6A-EL].)
9		No	Go to the next step.
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Clear the DTC using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) • Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) • Are any DTCs present?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)
10		No	DTC troubleshooting completed.