Diagnostic Procedure For Water Valve

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

CHECK WATER VALVE POWER AND GROUND CIRCUITS

Disconnect water valve connector F68.
Turn ignition switch ON.
Rotate temperature control dial (driver) to 32°C (90°F).

Check voltage between water valve harness connector F68 terminal 1 and terminal 2 while rotating temperature control dial (driver) to 18°C (60°F).

Connector	Terminals		Condition	Voltage (Approx.)
Connector	(+)	(-)	Condition	Voltage (Approx.)
Water valve: F68	2	1	Rotate temperature control dial	Battery voltage

Fig 1: Checking Voltage Between Water Valve Harness Connector F68 Terminal 1 And 2

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: GO TO 3.

NO: GO TO 2.

CHECK WATER VALVE CONTROL OUTPUT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector M50.
3. Check continuity between water valve harness connector F68 (A) terminal 2 and A/C auto amp. harness connector M50 (B) terminal 46.
  2 - 46: Continuity should exist.
4. Check continuity between water valve harness connector F68 terminal 2 and ground.
  2 - Ground: Continuity should not exist.
  
  Fig 2: Checking Continuity Between Water Valve Connector F68 Terminal 2 And A/C Auto Amp. Connector M50 Terminal 46
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Is the inspection result normal?
  
  YES: Replace A/C auto amp. Refer to "REMOVAL AND INSTALLATION ".
  
  NO: Repair harness or connector.

CHECK WATER VALVE POWER AND GROUND CIRCUITS

Rotate temperature control dial (driver) to 18°C (60°F).

Check voltage between water valve harness connector F68 terminal 1 and terminal 2 while rotating temperature control dial (driver) to 32°C (90°F).

Connector	Terminals		Condition	Voltage (Approx.)
Connector	(+)	(-)	Condition	Voltage (Approx.)
Water valve: F68	1	2	Rotate temperature control dial	Battery voltage

Fig 3: Checking Voltage Between Water Valve Harness Connector F68 Terminal 1 And 2

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: Replace the water valve.

NO: GO TO 4.

CHECK WATER VALVE CONTROL OUTPUT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector M50.
3. Check continuity between water valve harness connector F68 (A) terminal 1 and A/C auto amp. harness connector M50 (B) terminal 45.
  1 - 45: Continuity should exist.
4. Check continuity between water valve harness connector F68 (A) terminal 1 and ground.
  1 - Ground: Continuity should not exist.
  
  Fig 4: Checking Continuity Between Water Valve Connector F68 Terminal 1 And A/C Auto Amp. Connector M50 Terminal 45
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Is the inspection result normal?
  
  YES: Replace A/C auto amp. Refer to "REMOVAL AND INSTALLATION ".
  
  NO: Repair harness or connector.