Honda Element. Manual — part 87
ECM/PCM memory.
Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic
runs.
The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.
DTC P2648 (21): ADVANCED DIAGNOSTICS
DTC P2648: ROCKER ARM OIL CONTROL SOLENOID CIRCUIT LOW VOLTAGE
Fig. 247: Rocker Arm Oil Control Solenoid Circuit Diagram
General Description
The VTEC system activates the rocker arm oil control solenoid by command from the engine control module
(ECM)/powertrain control module (PCM), and it charges/discharges the hydraulic circuit of the VTEC
mechanism that switches valve timing between low and high. If the return signal is OFF (low) when the
ECM/PCM outputs the ON (high) signal to the rocker arm oil control solenoid, the ECM/PCM detects a
malfunction and a DTC is stored.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
MONITOR DESCRIPTION
Enable Conditions
ENABLE CONDITIONS
Execution
Continuous
Sequence
None
Duration
1.1 seconds or more
DTC Type
One drive cycle, MIL ON
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)
2007 Honda Element EX
2007 ENGINE PERFORMANCE Advanced Diagnostics - Element
Malfunction Threshold
The return signal is OFF (low) for at least 1.1 seconds when the ECM/PCM outputs the ON (high) signal to the
rocker arm oil control solenoid.
Driving Pattern
1. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator
fan comes on.
2. Drive the vehicle in a lower gear at 4,000 rpm or more with a manifold absolute pressure (MAP) value of
12 kPa (3.5 in.Hg, 90 mmHg) or more for at least 10 seconds.
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
Diagnosis Details
Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
ECM/PCM memory.
Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic
runs.
The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.
DTC P2649 (21): ADVANCED DIAGNOSTICS
DTC P2649: ROCKER ARM OIL CONTROL SOLENOID CIRCUIT HIGH VOLTAGE
Condition
Minimum
Maximum
Battery voltage
10.0 V
-
No active DTCs
P2649
2007 Honda Element EX
2007 ENGINE PERFORMANCE Advanced Diagnostics - Element
Fig. 248: Rocker Arm Oil Control Solenoid Circuit Diagram
General Description
The VTEC system activates the rocker arm oil control solenoid by command from the engine control module
(ECM)/powertrain control module (PCM), and it charges/discharges the hydraulic circuit of the VTEC
mechanism that switches valve timing between low and high. If the return signal is ON (high) when the
ECM/PCM outputs the OFF (low) signal to the rocker arm oil control solenoid, the ECM/PCM detects a
malfunction and a DTC is stored.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
MONITOR DESCRIPTION
Enable Conditions
ENABLE CONDITIONS
Malfunction Threshold
The return signal is ON (high) for at least 1.1 seconds when the ECM/PCM outputs the OFF (low) signal to the
rocker arm oil control solenoid.
Driving Pattern
Start the engine, and let it idle for at least 10 seconds.
Diagnosis Details
Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the
ECM/PCM memory.
Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic
Execution
Continuous
Sequence
None
Duration
1.1 seconds or more
DTC Type
One drive cycle, MIL ON
OBD Status
PASSED/FAILED/NOT COMPLETED (STILL TESTING)
Condition
Minimum
Maximum
Battery voltage
10.0 V
-
State of the engine
Running
No active DTCs
P2648
2007 Honda Element EX
2007 ENGINE PERFORMANCE Advanced Diagnostics - Element
runs.
The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by
disconnecting the battery.
DTC P2A00 (61): ADVANCED DIAGNOSTICS
DTC P2A00: AIR/FUEL RATIO (A/F) SENSOR (SENSOR 1) CIRCUIT RANGE/PERFORMANCE
PROBLEM
Fig. 249: Relationship Between A/F Sensor Output And Oxygen Concentration
General Description
The air/fuel ratio (A/F) sensor has a linear signal output in relation to the oxygen concentration. The engine
control module (ECM)/powertrain control module (PCM) computes the air/fuel ratio from A/F sensor output
voltage and uses the fuel feedback control to improve exhaust emissions. The ECM/PCM monitors A/F sensor
output voltage during deceleration with the throttle fully closed, and if the output voltage deviates greatly from
normal oxygen concentration levels, it detects a malfunction and stores a DTC.
* Output to the scan tool exhibits a relationship between the A/F sensor output and oxygen concentration, which
is opposite to the characteristic shown in the graph. That is, a deviation toward the rich side increases the output
voltage and one toward the lean side decreases the output voltage as the stoichiometric ratio is 0.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
MONITOR DESCRIPTION
Execution
Once per driving cycle
Sequence
None
Duration
3.5 seconds or more
DTC Type
Two drive cycles, MIL ON
2007 Honda Element EX
2007 ENGINE PERFORMANCE Advanced Diagnostics - Element
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