A/T Device (Park Position Switch) Circuit Inspection

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUNCTION

With CONSULT-II

Check that when the A/T selector lever is in P position, "DETENT SW" on the DATA MONITOR becomes OFF.

MONITOR ITEM CONTENTS

Monitor item [OPERATION or UNIT]		Contents
DETENT SW	"ON/OFF"	The selector lever position "P position (OFF)/other than P position (ON)" judged from the park switch signal is displayed.

Fig 1: Identifying CONSULT-II Display - DATA MONITOR

Without CONSULT-II

Turn ignition switch ON.

Check voltage between driver seat control unit connector and ground.

TERMINALS VOLTAGE SPECIFICATION

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
Driver seat control unit: P2	21	Ground	A/T selector lever in P position	0
Driver seat control unit: P2	21	Ground	A/T selector lever in other than P position	Battery voltage

Fig 2: Checking Voltage Between Driver Seat Control Unit Connector And Ground

OK or NG

OK: A/T device (park position switch) circuit is OK.

NG: GO TO 2.

CHECK A/T DEVICE (PARK POSITION SWITCH) HARNESS
1. Turn ignition switch OFF.
2. Disconnect A/T device and driver seat control unit.
3. Check continuity between A/T device connector M156 terminal 4 and driver seat control unit connector P2 terminal 21.
  4 - 21 : Continuity should exist.
4. Check continuity between A/T device connector M156 terminal 4 and ground.
  4 - Ground : Continuity should not exist.
  
  Fig 3: Checking Continuity Between A/T Device Connector M156 Terminal 4 And Ground
OK or NG

OK: GO TO 3.

NG: Repair or replace harness.

CHECK A/T DEVICE

Check continuity between A/T device (park position switch) as follows.

TERMINALS CONTINUITY REFERENCE

Terminals		Condition	Continuity
4	2	A/T selector lever in P position	Yes
4	2	A/T selector lever in other than P position	No

Fig 4: Checking Continuity Between A/T Device (Park Position Switch) Terminals

OK or NG

OK: GO TO 4.

NG: Replace A/T device. Refer to "SHIFT CONTROL SYSTEM ".

CHECK A/T DEVICE

Check continuity between A/T device (park position switch) connector and ground.

TERMINALS CONTINUITY REFERENCE

Connector	Terminals		Continuity
A/T device: M156	2	Ground	Yes

Fig 5: Checking Continuity Between A/T Device (Park Position Switch) Connector And Ground

OK or NG

OK: Check the condition of the harness and connector.

NG: Repair or replace harness.