Kohler KG2204 Service page 78

Action
 Turn the ECM power ON.
 Connect Spectrum in the data stream mode.
 Clear the diagnostic code.
 Turn the ECM power OFF.
 Turn the ECM power ON.
Does the diagnostic troubleshooting code (DTC) re-set?
 Inspect the throttle connector terminals for damage, corrosion or
contamination
Did you find a problem?
 Turn the ECM power OFF.
 Disconnect the wire harness connector from the ECM.
 Disconnect the wire harness connector from the TMAP or MAP sensor.
 Inspect TMAP connector pins 2 and 4, and ECM connector P26 pin 70
and P26 pin 40 for damage, corrosion, or contamination.
Did you find a problem?
With the ECM power OFF, check for continuity between the following:
 TMAP connector pin 1 and ECM connector P26 pin 35.
 TMAP connector pin 2 and ECM connector P26 pin 40.
 TMAP connector pins 3 and P26-74.
 TMAP connector pin 4 and ECM connector P26 pin 70.
 MAP connector pin 1 and ECM P26-13.
 Map connector pin 2 and ECM P26-40.
 MAP connector pin 4 and ECM P26-70.
Does the DVOM show continuity?
With the ECM power OFF, check for continuity between the following:
 TMAP or MAP connector pin 1 and engine ground.
 TMAP or MAP connector pin 2 and engine ground.
 TMAP connector pin 3 and engine ground.
Does the DVOM show continuity?
 Using a DVOM check for continuity between TMAP connector pins 1 and
3.
Does the DVOM show continuity?
 Replace the TMAP or MAP sensor. Refer to Section 5.10.
Is the replacement complete?
 Remove all test equipment except Spectrum.
 Connect any disconnected components.
 Using Spectrum, clear DTC information from the ECM.
 Turn the ECM power OFF and wait 30 seconds.
 Start the engine and operate to full operating temperature.
 Use Spectrum to verify if the DTC code was regenerated.
 Observe engine performance.
Does the engine operate normally with no stored codes?
 Replace the ECM. Refer to Section 5.4.
Is the replacement complete?
 Remove all test equipment except Spectrum.
 Connect any disconnected components.
 Using Spectrum, clear DTC information from the ECM.
 Turn the ECM power OFF and wait 30 seconds.
 Start the engine and operate to full operating temperature.
 Use Spectrum to verify if the DTC code was regenerated.
 Observe engine performance.
Does the engine operate normally with no stored codes?
Figure 4-27 TMAP or MAP Sensor Troubleshooting
78 Electrical System and Sensor Troubleshooting
Yes No
Troubleshoot as an
Go to the next step.
intermittent problem.
Repair the circuit as
Go to the next step.
necessary.
Repair the damaged
wire harness Go to the next step.
connection.
Repair the open
Go to the next step.
circuit as necessary.
Repair the shorted
Go to the next step.
circuit as necessary.
Repair the shorted
signal to 5 volt circuit Go to the next step.
as necessary.
Go to the next step.
The system is OK. Go to the next step.
Go to the next step. -
Check for and
troubleshoot any
The system is OK.
other diagnostic
codes.
TP-6903 5/16a