Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK TCM POWER SOURCE (PART 1)

Turn ignition switch OFF.
Disconnect A/T assembly connector.

Check voltage between A/T assembly vehicle side harness connector terminal and ground.

A/T assembly vehicle side harness connector		Ground	Condition	Voltage (Approx.)
Connector	Terminal
F51	2		Always	Battery voltage

Is the inspection result normal?

YES: GO TO 2.

NO: GO TO 6.

CHECK TCM POWER SOURCE (PART 2)

Check voltage between A/T assembly vehicle side harness connector terminals and ground.

A/T assembly vehicle side harness connector		Ground	Condition	Voltage (Approx.)
Connector	Terminal
F51	1		Turn ignition switch ON	Battery voltage
			Turn ignition switch OFF	0 V
	6		Turn ignition switch ON	Battery voltage
			Turn ignition switch OFF	0 V

Is the inspection result normal?

YES: GO TO 3.

NO: GO TO 7.

CHECK TCM GROUND CIRCUIT

Check continuity between A/T assembly vehicle side harness connector terminals and ground.

A/T assembly vehicle side harness connector		Ground	Continuity
Connector	Terminal
F51	5		Existed
	10

Is the inspection result normal?

YES: GO TO 4.

NO: Repair or replace damaged parts.

CHECK JOINT CONNECTOR

Remove joint connector. Refer to "EXPLODED VIEW ".

Check the continuity between joint connector terminals.

A/T assembly harness connector side	TCM harness connector side	Continuity
Terminal	Terminal	Continuity
1	1	Existed
2	2
5	5
6	6
10	10

Is the inspection result normal?

YES: GO TO 5.

NO: Repair or replace damaged parts.

CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: Replace the control valve & TCM. Refer to "EXPLODED VIEW ".

NO: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
Check the following.
- Harness for short or open between battery positive terminal and A/T assembly vehicle side harness connector terminal 2. Refer to "WIRING DIAGRAM - BATTERY POWER SUPPLY - ".
- Battery
- 10A fuse (No. 36, located in the fuse, fusible link and relay box). Refer to "FUSE AND FUSIBLE LINK ARRANGEMENT ".
  Is the inspection result normal?
  
  YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".
  
  NO: Repair or replace damaged parts.

CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY (PART 1)

Turn ignition switch OFF.
Disconnect IPDM E/R connector.

Check continuity between IPDM E/R vehicle side harness connector terminal and A/T assembly vehicle side harness connector terminals.

IPDM E/R vehicle side harness connector		A/T assembly vehicle side harness connector		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E7	58	F51	1	Existed
E7	58	F51	6	Existed

Is the inspection result normal?

YES: GO TO 8.

NO: Repair or replace damaged parts.

CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY (PART 2)

Check continuity between A/T assembly vehicle side harness connector terminal and ground.

A/T assembly vehicle side harness connector		Ground	Continuity
Connector	Terminal
F51	1		Not existed
	6

Is the inspection result normal?

YES: GO TO 9.

NO: Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM
Check the following.
- Harness for short or open between ignition switch and IPDM E/R. Refer to "WIRING DIAGRAM - IGNITION POWER SUPPLY - ".
- Ignition switch
- 10A fuse (No. 43, located in the IPDM E/R). Refer to "FUSE, CONNECTOR AND TERMINAL ARRANGEMENT ".
- IPDM E/R
  Is the inspection result normal?
  
  YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".
  
  NO: Repair or replace damaged parts.