Map sensor and tps sensor is not of a functional ... how do Repin in ecu

PO 748
service the transmission .....check solenoids

- Dirty transmission fluid - Low transmission fluid level - Faulty line pressure solenoid valve 'A' - Line pressure solenoid valve 'A' harness is open or shorted - Line pressure solenoid valve 'A' circuit poor electrical connection

Read more: http://www.autocodes.com/p0748.html

P0108
is the code for a problem with the MAP electrical circuit sensor having too high voltage input to the Engine Control Unit (ECU). This means that the voltage input to the ECU is too high and that it is not in the correct range for proper engine operation to work with inputs from the Mass Air Flow Sensor (MAF) and Throttle Position Switch (TPS). P0108 OBD II Trouble Code Manifold Air Pressure MAP Barometric Pressure...


odyssey map sensor is on the throttle body

Map sensor

MAP MANIFOLD ABSOLUT PRESSURE, MEASURE INWARD AIR FLOW OF INTAKE MANIFOLD, WORKS WITH MAF, TPS O2 SENSOR, TO GIVE THE RIGHT FUEL AIR MIXTURE, FOR MAXIMUN FUEL ECONOMY AND PROFORMANCE.

Check wiring connections between ECU and TPS (Throttle Position Sensor). Chances are your TPS has malfunctioned. The ECU (Engine Control Unit) monitors TPS signals at regular intervals. I trust your computer (ECU) to have done it's job... Replace the TPS
Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc.

usually a bad MAP sensor or TPS. I would test both. Let me know if you have questions and provide test results for repair advice.

MAP Sensor TESTING
See Figures 3, 4 and 5

1. Backprobe with a high impedance voltmeter at MAP sensor terminals A and C.
2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
3. If the voltage is not as specified, either the wiring to the MAP sensor or the ECM may be faulty. Correct any wiring or ECM faults before continuing test.
4. Backprobe with the high impotence voltmeter at MAP sensor terminals B and A.
5. Verify that the sensor voltage is approximately 0.5 volts with the engine not running (at sea level).
6. Record MAP sensor voltage with the key ON and engine off.
7. Start the vehicle.
8. Verify that the sensor voltage is greater than 1.5 volts (above the recorded reading) at idle.
9. Verify that the sensor voltage increases to approximately 4.5. volts (above the recorded reading) at Wide Open Throttle (WOT).
10. If the sensor voltage is as specified, the sensor is functioning properly.
11. If the sensor voltage is not as specified, check the sensor and the sensor vacuum source for a leak or a restriction. If no leaks or restrictions are found, the sensor may be defective and should be replaced.

Fig. Fig. 3: Location of the MAP sensor-TBI system shown

Fig. Fig. 4: Probe the terminals of the MAP sensor to check for proper reference voltage

Fig. Fig. 5: Manifold Absolute Pressure (MAP) sensor wiring diagram

TPS TESTINGSee Figures 2, 3 and 4

1. Backprobe with a high impedance voltmeter at TPS terminals A and B.
2. With the key ON and engine off, the voltmeter reading should be approximately 5.0 volts.
3. If the voltage is not as specified, either the wiring to the TPS or the ECM may be faulty. Correct any wiring or ECM faults before continuing test.
4. Backprobe with a high impedance voltmeter at terminals C and B.
5. With the key ON and engine off and the throttle closed, the TPS voltage should be approximately 0.5-1.2 volts.
6. Verify that the TPS voltage increases or decreases smoothly as the throttle is opened or closed. Make sure to open and close the throttle very slowly in order to detect any abnormalities in the TPS voltage reading.
7. If the sensor voltage is not as specified, replace the sensor.

Fig. Fig. 2: Using a DVOM, backprobe terminals A and B of the TPS sensor to check for proper reference voltage

Fig. Fig. 3: Using the DVOM, backprobe terminals C and B of the TPS sensor, open and close the throttle and make sure the voltage changes smoothly

Fig. Fig. 4: Throttle Position Sensor (TPS) wiring diagram

service manual.
Code Description Possible Cause
0 ECU / ECU signal No signal to ECU
1 Oxygen sensor circuit Oxygen sensor or circuit, ECU
2 Oxygen sensor circuit Oxygen sensor or circuit, ECU
3 MAP sensor circuit Map sensor circuit
4 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
sensor
5 MAP sensor circuit MAP sensor or circuit, mechanical
problem
6 ECT sensor circuit ECT sensor or circuit, automatic
transaxle control unit
7 TPS / Angle Sensor TPS sensor or circuit, automatic
transaxle control unit
8 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
sensor
9 CMP sensor CMP sensor or circuit
10 IAT sensor IAT sensor or circuit
11 Idle Mixture Adjuster Sensor Idle mixture adjuster sensor or
circuit
12 EGR system fault No EGR action, faulty EGR valve
13 BARO sensor circuit BARO sensor or circuit
14 Idle Air Control valve circuit / ECU Open or shorted out ignition signal
circuit / No signal to ECU
15 Ignition Output signal Open or shorted ignition output
signal circuit
16 Fuel Injector Circuit Open or shorted fuel injector
circuit
17 VSS circuit VSS sensor or circuit
18 Ignition Timing Adjuster Open or shorted signal circuit
19 A/T Lock-up control solenoid Open or shorted signal circuit,
Lock-up control solenoid lock-up solenoid
20 Electrical Load Detector / Sensor Electrical load detector or circuit
Honda/Acura
Fault Code Definitions (21 - 59)
Chapter 3 22
Code Description Possible Cause
21 Spool Solenoid Valve Open or shorted signal circuit,
spool solenoid valve
22 Valve Timing Electronic Oil Open or shorted signal circuit,
pressure switch valve timing oil pressure switch
23 Knock sensor circuit Knock sensor or circuit
30 AT / ECU communication signal A AT control unit, ECU
31 AT / ECU communication signal B AT control unit, ECU
35 Traction control / ECU / signal Traction control module, ECU
36 Traction control / ECU / signal Traction control module, ECU
41 Oxygen sensor heater - left side Oxygen sensor / heater or circuit
42 Oxygen sensor heater - right side Oxygen sensor / heater or circuit
43 Fuel Supply system - left side Oxygen sensor or circuit, fuel
system
44 Fuel Supply system - right side Oxygen sensor or circuit, fuel
system
45 Fuel metering - left side Injector control circuit, incorrect
fuel metering
46 Fuel metering - right side Injector control circuit, incorrect
fuel metering
48 Heated oxygen sensor Oxygen sensor or circuit
53 Right Knock Sensor Right knock sensor or circuit
54 CKP sensor 2 CKP sensor 2 or circuit
59 CMP sensor 2 CMP sensor 2 or circuit

It's a map/tps sensor correlation code, essentially it means the map sensor reading isn't what's expected with the tps reading and vice versa! It sounds like your tps sensor is probably bad or the circuit to one of those 2 sensors.

Hope helps (remember rated this).

I would change your throttle position sensor (TPS) or at least check all related wiring, fuses and relays concerning this device. It is located on the outside of the throttle body at the end of the throttle plate shaft. Its function is to send a an electrical signal to the ECU that correspnds to the position of the throttle plate. Your TPS is not sending a signal to the ECU so the ECU does not know to inject more fuel in response to the throttle being opened. The call for more fuel in the absence of immediate input from the TPS is being made to the ECU by the Manifold air pressure sensor but this can a take a second or two to respond to pressure changes, hence the hesitation in acceleration. One really quick way to check is to simply disconnect the TPS electrical connector. If it were running normally you will notice an immediate change in engine idle, as your is faulty you will notice no difference

What was the code? Basically all the sensors are linked together in some way, For instance the MAP sensor needs a certain reading, it then sends the signal to the ecu which will then tell the TPS sensor.. ok you need to do this. but if it was a code like tps sensor low voltage or high input or somthing, its likely an indication of a wiring problem, and bad signal from another sensor, or the ecu

Who did the reflash and custom map? Ave them pull the codes and get to the bottom of what is causing the SES light. Many time the ECU just lights up all the lights. If the code is from the airflow maps not being correctly adjusted with the extra power you have, then one of the problems that the ECU thinks it has is a TPS fault.

The ECU is programmed to look for matching boost, airflow and throttle position and compare it with torque. If everything does not match up, then it throws the lights and a code. But getting a custom remap, you went and messed with all that.

Go back and have a talk with yout tuner. He should be able to fix it up. If you bought the car with the tune, find an experienced EVO tuner in your area. East Coast would be Ivey Tune, AMS, Turbotrix, or TTP down in Fla. West coast would be GST in the bay area or Road Race Engineering in LA.

Mike W