P036

DTC PO36: Part 1 Of 2:

DTC PO36: Part 2 Of 2:

PCM Circuit:

CIRCUIT DESCRIPTION
This diagnostic test checks for a malfunction in the circuitry and hardware at the Exhaust Gas Recirculation (EGR) valve. The controllability at the valve is monitored by the pintle position error from desired. If such condition exits, Code P036 is set.

TEST CONDITION
Ignition voltage 11 volts or greater.

FAILURE CONDITIONS
Difference between commanded and actual EGR position is greater than 25 counts for 10 seconds;

OR

Learned EGR closed position is below 9 counts or above 103 counts.

ACTION TAKEN
1. Powertrain Control Module (PCM) turns "ON" the Malfunction Indicator Lamp (MIL) (Service Engine Soon).
2. PCM disables the EGR solenoid for the entire ignition cycle.
3. Transaxle shift adapts are maintained at current levels.

NOTES ON FAULT TREE
(Part 1 of 2)
1. This checks to see if the EGR pintle position feedback is within a valid range with EGR "OFF."
2. This forces a high signal on the feedback circuit and looks for an appropriate result.
3. This removes the signal on the feedback circuit and checks for an appropriate result.
4. Since the 5 volt reference line is jumpered to the feedback line, the jumper should read 5 volts.

(Part 2 of 2)
5. With the EGR valve "OFF," (EGR overridden to 0), the EGR pintle position should read less than 50 counts.
6. With the EGR valve commanded to 50%, the EGR pintle position should read between 100 and 150 counts.
7. With the EGR valve full "ON," the EGR pintle position should read greater than 200 counts.
8. The Code P036 snapshot parameter PD07 (EGR pintle position) valve can help determine the root cause even if the problem cannot be reproduced. If a low pintle position (less than 9) is recorded in the snapshot, that means a low feedback circuit voltage caused the code to set. If a high pintle position (greater than 250) is recorded in the snapshot, that means a high feedback circuit voltage caused the code to set. If an intermediate pintle position (between 9 and 250) is recorded in the snapshot, that means the code was probably set because the PCM could not control the EGR solenoid either due to intermittents in the solenoid (CKTs 741 and 435) or a sticky EGR valve.