Fig. 415: DTC Troubleshooting Flow Chart (P2649)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and
review the general troubleshooting information See HOW TO TROUBLESHOOT
THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS .
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P2649 ROCKER ARM OIL CONTROL SOLENOID
CIRCUIT HIGH VOLTAGE
1. Problem verification:
ο‘
1. Turn the ignition switch to ON (II).
ο‘
2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
ο‘
3. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator
fan comes on, then let it idle.
4. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P2649 ROCKER ARM OIL CONTROL SOLENOID
CIRCUIT HIGH VOLTAGE
Is DTC P2649 indicated?
YES : The failure is duplicated. Go to step 2.
NO : Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at
the rocker arm oil pressure switch, the rocker arm oil control solenoid, and the PCM.
2. Rocker arm oil control solenoid internal resistance check:
ο‘
1. Turn the ignition switch to LOCK (0).
2. Disconnect the following connector.
ο‘
Rocker arm oil control solenoid 2P connector
ο‘
3. At the rocker arm oil control solenoid side, measure the resistance between test points 1 and 2.
Test condition IG LOCK (0)
Rocker arm oil control solenoid 2P connector: disconnected
Test circuit VT SOL, PG1
Test point 1 Rocker arm oil control solenoid 2P connector No. 1 (rocker arm oil control solenoid
side)
Test point 2 Rocker arm oil control solenoid 2P connector No. 2 (rocker arm oil control solenoid
side)
Fig. 416: Measuring Resistance Between Rocker Arm Oil Control Solenoid 2P Connector No.
1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there 14-30 ohms at room temperature?
YES : Go to step 3.
NO : REPLACE THE ROCKER ARM OIL CONTROL VALVE , then do the repair verification .
3. Open wire check (PG1 line):
ο‘
1. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Rocker arm oil control solenoid 2P connector: disconnected
Test circuit PG1
Test point 1 Rocker arm oil control solenoid 2P connector No. 2 (BLK)
Test point 2 Body ground
Fig. 417: Checking Continuity Between Rocker Arm Oil Control Solenoid 2P Connector No.
2 (BLK) And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Go to step 4.
NO : Repair an open in the PG1 wire between the rocker arm oil control solenoid and the G101, then do
the repair verification .
4. Shorted wire check (VT SOL line):
ο‘
1. Jump the SCS line with the HDS.
2. Disconnect the following connector.
ο‘
PCM connector B (49P)
ο‘
3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Rocker arm oil control solenoid 2P connector: disconnected
PCM connector B (49P): disconnected
Test circuit VT SOL
Test point 1 PCM connector B (49P) No. 33 (GRN)
Test point 2 Rocker arm oil control solenoid 2P connector No. 1 (GRN)
Fig. 418: Checking Continuity Between PCM Connector B (49P) No. 33 (GRN) And Rocker
Arm Oil Control Solenoid 2P Connector No. 1 (GRN)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The VT SOL wire is OK. Update the PCM See PCM REMOVAL AND INSTALLATION or
PCM UPDATE if it does not have the latest software, or substitute a known-good PCM See PCM
UPDATE or PCM REMOVAL AND INSTALLATION , then do the repair verification .
NO : Repair an open in the VT SOL wire between the rocker arm oil control solenoid and the PCM
(B33), then do the repair verification .
REPAIR VERIFICATION
ο‘
ο‘
ο‘
1. Reconnect all connectors.
2. Turn the ignition switch to ON (II).
3. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
ο‘
4. DO THE PCM IDLE LEARN PROCEDURE .
5. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan
comes on, then let it idle
ο‘
6. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P2649 ROCKER ARM OIL CONTROL SOLENOID
CIRCUIT HIGH VOLTAGE
Is DTC P2649 indicated?
YES : Check for poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil
control solenoid, and the PCM. If the PCM was updated, substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then recheck. If the PCM was substituted, go to
step 1.
NO : Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM UPDATE
or PCM REMOVAL AND INSTALLATION . If any other Pending or Confirmed DTCs are indicated, go to
the indicated DTC's troubleshooting.
DTC P2A00: A/F SENSOR (SENSOR 1) CIRCUIT RANGE/PERFORMANCE
PROBLEM
Fig. 419: DTC Troubleshooting Flow Chart (P2A00)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and
review the general troubleshooting information See HOW TO TROUBLESHOOT
THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS .
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P2A00 A/F SENSOR (SENSOR 1) CIRCUIT
RANGE/PERFORMANCE PROBLEM
1. Problem verification:
ο‘
1. Turn the ignition switch to ON (II).
ο‘
2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
ο‘
3. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator
fan comes on, then let it idle.
4. Test-drive under these conditions:
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