Honda Element. Manual - part 77

Fig. 220: Throttle Position (TP) Sensor Circuit Diagram

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

Fig. 221: Throttle Position (TP) Sensor Output Voltage - Graph 

General Description 

The electronic throttle control system (ETCS) controls the throttle valve opening. The system is composed of 
the throttle actuator, the throttle valve, throttle position (TP) sensors A and B, the throttle actuator control 
module, the throttle actuator control module relay, the accelerator pedal position (APP) sensor, and the engine 
control module (ECM)/powertrain control module (PCM). 

The APP sensor is operated via the throttle cable to determine the accelerator opening value when the driver 
presses the accelerator pedal. The accelerator pedal opening value is converted to a signal in the APP sensor and 
transmitted to the ECM/PCM to compute the target position. The target position signal is then transmitted to the 
throttle actuator control module. 

The throttle actuator control module determines the throttle valve target position according to the signal 
received and operates the throttle actuator to move the throttle valve to the target position. The actual throttle 
valve position is determined by TP sensor A installed in the throttle body. 

The throttle actuator control module compares the voltages and the throttle valve positions of TP sensor A and 
TP sensor B. If the difference of the voltages or the throttle valve positions is a certain value or less for a set 
time, the throttle actuator control module detects a malfunction and the malfunction data is transmitted to the 
ECM/PCM. When the ECM/PCM receives the malfunction data from the throttle actuator control module, the 
ECM/PCM detects a malfunction in the relationship between TP sensor A and TP sensor B, and stores a DTC. 

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

MONITOR DESCRIPTION 

Enable Conditions 

ENABLE CONDITIONS 

Malfunction Threshold 

One of these conditions must be met for at least 0.2 second. 



The difference between the TP sensor A voltage and the TP sensor B voltage is 200 mV (5 °) or less.  



The difference between the throttle valve positions that TP sensor A and TP sensor B determined exceeds 
the value shown in this table.  

MALFUNCTION THRESHOLD VALUE 

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. 

Execution

Continuous

Sequence

None

Duration

0.2 second or more

DTC Type

One drive cycle, MIL ON

OBD Status

N/A

Condition

Minimum

Maximum

TP sensor B voltage

-

2.3 V

Ignition switch

ON

No active DTCs

P0122, P0123, P0222, P0223, P2101, P2108, P2118, P2176, U0107

Other

After the throttle valve fully closed position registration is completed

Throttle valve position determined by TP sensor 
A

Difference between TP sensor A and TP sensor 
B

0 °

1.8 ° or more

83.3 °

14.7 ° or more

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element

  

DTC P2138 (37): ADVANCED DIAGNOSTICS

DTC P2138: ACCELERATOR PEDAL POSITION (APP) SENSOR A/B (THROTTLE POSITION 
SENSOR D/E) INCORRECT VOLTAGE CORRELATION 

Fig. 222: Accelerator Pedal Position Sensor - Circuit Diagram 

Fig. 223: Accelerator Pedal Position (APP) Sensor Output Voltage - Graph

 

2007 Honda Element EX 

2007 ENGINE PERFORMANCE Advanced Diagnostics - Element