Honda Pilot: Variable Cylinder Management Rocker Arm Test

Test

1. Ignition Coil and Spark Plug - Remove

2. Cylinder Head Cover - Remove

3. VTEC Rocker Arm - Test

Front Bank

1. Rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) should move independently of the intake secondary rocker arm (B):
   • If the intake primary and secondary rocker arms do not move independently, remove the intake primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
   • If the intake primary and secondary rocker arms move independently, go to step 2.

Rear Bank

2. Rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary L rocker arm (B) should move together, on the other hand, intake primary rocker arm and the intake secondary H rocker arm (C) should move independently:
   • If the intake primary and secondary L rocker arms do not move together, remove the intake primary, secondary L and H rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the intake primary, secondary rocker arms L and H as an assembly, then retest.
   • If the intake primary rocker arm and the intake secondary L rocker arms move together, go to step 3.

3. Rotate the crankshaft pulley clockwise. Make sure that the exhaust primary rocker arms (A) and the exhaust secondary rocker arms (B) are mechanically connected by the pistons and that the exhaust primary rocker arm and the exhaust secondary rocker arms should move together:
   • If the exhaust primary and secondary rocker arms do not move together, remove the exhaust primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the exhaust primary and secondary rocker arms as an assembly, then retest.
   • If the exhaust primary and secondary rocker arms move together, go to the next procedure.

4. Air Pressure - Check

1. Check that the air pressure on the shop air compressor gauge indicates over 690 kPa (7.04 kgf/cm2, 100.1 psi).

5. Valve Clearance - Inspect

6. VTEC/VCM Change Over - Test

Front (VTEC)

1. Remove the sealing bolt, then install the VCM air adapter (A) to the inspection hole and install VTEC air stop tool B, then connect the air pressure regulator (C) as shown.
2. Loosen the valve on the air pressure regulator, and apply the specified air pressure.

Specified Air Pressure

  441－490 kPa (4.50－5.00 kgf/cm2, 64.0－71.1 psi)

Rear (VTEC)

Rear (VCM)

Front (VTEC)

3. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary rocker arm (B) are mechanically connected by the pistons and that the intake primary and secondary rocker arms should move together:
   • If the intake primary and secondary rocker arms move independently, remove the intake primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary and secondary rocker arms as an assembly, then retest.
   • If the intake primary and secondary rocker arms move together, go to step 4.

Rear (VTEC)

4. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) and the intake secondary L and H rocker arms (B) are mechanically connected by the pistons and that the intake primary and secondary L and H rocker arms should move together:
   • If the intake primary and secondary L and H rocker arms move independently, remove the intake primary, secondary L and H rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary, secondary L and H rocker arms as an assembly, then retest.
   • If the intake primary and secondary L and H rocker arms move together, go to step 5.

Rear (VCM)

5. With the specified air pressure applied, rotate the crankshaft pulley clockwise. Make sure that the intake primary rocker arm (A) should move independently of the intake secondary L and H rocker arms (B). The exhaust primary rocker arms (C) should move independently of the exhaust secondary rocker arms (D):
   • If the intake primary, secondary L and H rocker arms do not move independently, remove the intake primary, secondary L and H as an assembly, and check that the pistons in the rocker arms move smoothly. If any intake rocker arm needs replacing, replace the primary, secondary L and H as an assembly, then retest.
   • If the exhaust primary and secondary rocker arms do not move independently, remove the exhaust primary and secondary rocker arms as an assembly, and check that the pistons in the rocker arms move smoothly. If any exhaust rocker arm needs replacing, replace the exhaust primary and secondary rocker arms as an assembly, then retest.
   • If the intake primary and secondary L and H rocker arms, and exhaust primary and secondary rocker arms move independently, go to next procedure.

7. All Special Tools - Remove

8. Sealing Bolt - Install

1. Torque the new sealing bolts to 22 N-m (2.2 kgf-m, 16 lbf-ft).

9. All Removed Parts - Install

1. Install the parts in the reverse order of removal.

Ventilated Seat Control Unit Input Test

NOTE:

• Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
• Before testing, check the No. C17 (20 A) fuse in the under-dash fuse/relay box is OK.
• Before testing, check the No. D1 (7.5 A) fuse in the auxiliary under-dash fuse/relay box is OK.

1. Disconnect the ventilated seat control unit 14P connector.

2. Inspect the connector and socket terminals to be sure they are all making good contact:

• If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
• If the terminals are OK, go to step 3.

3. With the connector still disconnected, do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, go to step 4.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
7	PUR	Under all conditions	Check for continuity between terminals No. 7 and No. 13: There should be continuity.	Faulty driver's seat cushion heater An open or high resistance in the wire
13	WHT
6	GRN	Under all conditions	Check for continuity between terminals No. 6 and No. 12: There should be continuity.	Faulty front passenger's seat cushion heater An open or high resistance in the wire
12	BRN

4. Reconnect the connector, and do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, replace the ventilated seat control unit.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
2	PNK	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. C17 (20 A) fuse in the under-dash fuse/relay box Poor ground (G401) or an open in the ground wire Faulty ventilated seat relay An open or high resistance in the wire
9	GRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. D1 (7.5 A) fuse in the under-dash fuse/relay box Faulty DC-DC converter IG1 relay 1 Poor ground (G301) or an open in the ground wire An open or high resistance in the wire
4	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G601) An open or high resistance in the ground wire
14	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G601) An open or high resistance in the ground wire
5	TAN	Vehicle ON mode, passenger's seat cushion blower motor and passenger's seat-back blower motor ON mode	Measure the voltage to ground: There should be battery voltage.	Faulty passenger's seat cushion blower motor Faulty passenger's seat-back blower motor Poor ground (G603) or an open in the ground wire An open or high resistance in the wire
8	BLU	Vehicle ON mode, driver's seat cushion blower motor and driver's seat-back blower motor ON mode	Measure the voltage to ground: There should be battery voltage.	Faulty driver's seat cushion blower motor Faulty driver's seat-back blower motor Poor ground (G601) or an open in the ground wire An open or high resistance in the wire
1	RED	Vehicle ON mode, driver's seat heater ON mode	Measure the voltage to ground: There should be battery voltage.	Faulty driver's seat heater Poor ground (G601) or an open in the ground wire An open or high resistance in the wire
3	LT BLU	Vehicle ON mode, front passenger's seat heater ON mode	Measure the voltage to ground: There should be battery voltage.	Faulty front passenger's seat heater Poor ground (G603) or an open in the ground wire An open or high resistance in the wire

Special Tool Required

• VCM Air Adapter 070AJ-001A101

• VTEC Air Stop Tool B 07AAJ-R70A200

• Air Pressure Regulator 07AAJ-PNAA101