How to replace Temperature/Manifold absolute pressure (TMAP) sensor for Kohler ECH440 EFI System.
2024 Kohler Kira Integrated Remote Analytics 2.6.0.0
KOHLER EFI Diagnostic 2.11.0013
A sealed non-serviceable integrated sensor that checks both intake air temperature and manifold absolute pressure. Complete replacement is required if it is faulty.
Sensor and wiring harness can be checked as follows.
If a fault code indicates a problem with Intake Air Temperature (TMAP) Sensor Circuit (P0112 or P0113), it can be tested as follows:
1 Remove TMAP sensor from throttle body.
2 Allow it to reach room temperature (20°C, 68°F).
3 Unplug Black connector from ECU.
4 With sensor still connected, check temperature sensor circuit resistance between Black pin 10 and 8 pin terminals. Value should be 1850-2450 Ω.
5 Unplug sensor from wire harness and check sensor resistance separately across pin. Resistance value should again be 1850-2450 Ω.
a If resistance is out of specifi cations, check local temperature. Sensor resistance will go down as
temperature is higher. Replace TMAP sensor if determined to be faulty.
b If it is within specifi cations, proceed to Step 6.
6 Check circuits (input, ground), from main harness connector to sensor plug for continuity, damage, etc.
Connect one ohmmeter lead to Black pin 8 in main harness connector (as in step 4). Connect other lead to terminal #3 in sensor plug. Continuity should be indicated. Repeat test between Black pin 10 and terminal #4 in sensor plug.
7 Reinstall sensor.
If a fault code indicates a problem with Manifold Absolute Pressure (TMAP) Sensor Circuit (P0107 or P0108), it can be tested as follows:
1 Make sure all connections are making proper contact and are free of dirt and debris. Slide locking
tab out and pull off TMAP connector. Turn key switch to ON and check with a volt meter by contacting red lead to pin 1 and black lead to pin 2. There should be 5 volts present, indicating ECU and wiring harness are functioning.
2 Check continuity in wire harness. Ohms between Pin 3 at sensor connector and Black pin 11 connector at ECU should be near zero ohms. If no continuity is measured or very high resistance, replace wire harness.
3 Check to make sure throttle body is not loose and TMAP sensor is not loose. Loose parts would allow a vacuum leak, making TMAP sensor report misleading information to ECU.
a Tighten all hardware and perform an ECU Reset and a TPS Learn Procedure to see if MIL will
display a fault with sensor again. If MIL finds a fault with TMAP sensor, replace it.
