CODE (DTC) 32 WILL SET WHEN
effectiveness by de-energizing the EGR control, thereby, shutting "OFF"
valve. With the EGR valve closed, and Oxygen
Sensor (O2S) fluctuating normally, fuel integrator counts
will be greater than they were during normal EGR operation. If the
change is not within the calibrated window, after failing the test
twice, a DTC 32 will be set.
will check EGR
- Throttle position between 10% and 25% angle.
- Steady throttle with no more than 2% change in throttle.
- Above 32 mph "Closed Loop" operation.
- Max short term fuel trim less than 6 counts for 3.2 seconds.
- Desired EGR
command greater than 40%.
- Manifold Absolute Pressure (MAP)
above60 kPa (17.5 in. of Hg.) or less than 15 kPa (4.4 in.
ACTION TAKEN (PCM
WILL DEFAULT TO)
The PCM will turn "ON" the Malfunction Indicator Lamp (MIL).
DTC 32 WILL CLEAR WHEN
Conditions for fault are no longer present and TECH 1 scan tool "clear
DTCs" function is used, 50 ignition
switch keycycles have passed with no further faults, or ignition
switch is turned "OFF" and ECM
"B" fuse is removed for 10 seconds.
DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
- This step checks the pintle's ability to be commanded to the desired
- This step checks for voltage to the linear EGR valve to verify
if the problem is in the ignition feed circuit.
- This checks the PCM
control circuit by jumpering across the CKT 435 and CKT 439 with a test
light and grounding the diagnostic connector to command the EGR
Before replacing PCM,
use an ohmmeter and check the resistance of each PCM controlled relay
and solenoid coil. With J 39200 Digital Volt-Ohm Meter (DVOM) ,
check resistance of EGR
- A to E...7.8 - 8.6 Ohms
- B to D...Above 3k
- D to C...From 0.7 to 4.0k ohms when slowly moving pintle valve