DTC P2652
DTC P2652 : Rocker Arm Oil Pressure Switch B (Bank 1) Stuck on
Special Tools Required
Pressure Gauge Adapter 07NAJ-P07010A
A/T Low Pressure Gauge w/Panel 07406-0070301
A/T Pressure Test Hose 07AAJ-PY4A100
A/T Pressure Adapter 07MAJ-PY40120
Oil Pressure Hose 07ZAJ-S5AA200
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information .
- If DTC P2658 and/or P2659 are stored at the same time as DTC P2652, troubleshoot those DTCs first, then recheck for DTC P2652.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P2652 Rocker Arm Oil Pressure Switch B (Bank 1) Stuck on |
DTC (PGM-FI)
- Oil level check
-1. Check the engine oil level .
Is the level OK?
YES
Go to step 2.
NO
Adjust the engine oil to the proper level , then do the repair verification.
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Select the VTEC+VCM TEST in the INSPECTION MENU with the HDS, then select the CDVEB TEST with the HDS.
CDVEB TEST
Does the HDS indicate Normal?
YES
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at rocker arm oil pressure switch B (Bank 1) and the PCM.
NO
The failure is duplicated. Go to step 3.
- Shorted wire check (VCMSW line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Jump the SCS line with the HDS.
-3. Disconnect the following connector.
PCM connector C (51P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector C (51P): disconnected Test circuit VCMSW Test point 1 PCM connector C (51P) No. 34 (TAN) Test point 2 Body ground Is there continuity?
YES
Go to step 5.
NO
Go to step 4.
- VCM system oil pressure check
-1. Remove rocker arm oil pressure switch B (Bank 1) (A), and attach the special tools as shown, then attach rocker arm oil pressure switch B (Bank 1) to the oil pressure gauge adapter (B).
-2. Reconnect the following connector.
Rocker arm oil pressure switch B (Bank 1) 1P connector -3. Start the engine.
-4. Select the VTEC+VCM TEST in the INSPECTION MENU with the HDS, then select the CDVEB TEST with the HDS.
CDVEB TEST
Check the oil pressure.
Is the oil pressure 45 kPa (0.46 kgf/cm2, 6.5 psi) or more?
YES
Replace the rear rocker arm oil control valve , then do the repair verification.
NO
Inspect the VCM system oil passage. If it is OK, replace the rear rocker arm oil control valve , then do the repair verification.
- Rocker arm oil pressure switch B (Bank 1) internal circuit check
-1. Disconnect the following connector.
Rocker arm oil pressure switch B (Bank 1) 1P connector -2. At the rocker arm oil pressure switch side, check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector C (51P): disconnected Rocker arm oil pressure switch B (Bank 1) 1P connector: disconnected Test circuit VCMSW Test point 1 Rocker arm oil pressure switch B (Bank 1) 1P connector No. 1 (rocker arm oil pressure switch side) Test point 2 Body ground Is there continuity?
YES
Replace rocker arm oil pressure switch B (Bank 1) , then do the repair verification.
NO
Repair a short in the VCMSW wire between the PCM (C34) and rocker arm oil pressure switch B (Bank 1), then do the repair verification.
- Repair verification
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Reconnect all connectors.
-3. Exit the SCS mode with the HDS.
-4. Turn the vehicle to the ON mode.
-5. Reset the PCM with the HDS .
Reset PCM
-6. Do the PCM idle learn procedure .
-7. Select the VTEC+VCM TEST in the INSPECTION MENU with the HDS, then select the CDVEB TEST with the HDS.
CDVEB TEST
Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P2652 Rocker Arm Oil Pressure Switch B (Bank 1) Stuck on DTC (PGM-FI)
Is DTC P2652 indicated?
YES
Check for poor connections or loose terminals at rocker arm oil pressure switch B (Bank 1) and the PCM. If the PCM was updated, substitute a known-good PCM , then recheck. If the PCM was substituted, go to step 1.
NO
Troubleshooting is complete. If the PCM was substituted, replace the original PCM . If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.