Part 3 of 3

Diagnostic Chart - Part 3 Of 3:

Circuit Schematic:

PCM/EC DIAGNOSTIC TROUBLE CODE 32 - Part 3 of 3

LINEAR EXHAUST GAS RECIRCULATION (EGR) SYSTEM

TEST DESCRIPTION
1. This diagnostic chart assumes that DTC 26 and 32 were related, therefore, it is important that other QDM functions are operating properly before diagnosing potential EGR problems. If there is a QDM problem, data in the general information table will indicate if the problem is in QDM-A or QDM-B.
2. When the engine is at idle EGR is commanded Off. During this condition the linear EGR module should be supplying 12 volts to the PCM pin J2A05. If DTC 26 and 27 are set, the problem is due to a low voltage being detected on circuit 697.
3. A blown EGR fuse would result in a DTC 26 due to the low voltage on circuit 697.

DIAGNOSTIC AIDS
When attempting to diagnose an intermittent problem use the Scan tool and review the Malfunction history supplemental code information. The supplemental data may help indicate when the problem occurred.

If Malfunction history indicates a DTC 26 and 32 were set and no other quad driver related complaints were detected, the DTC 32 was probably set due to a problem in circuit 697, the linear EGR module or possibly the PCM.

If DTC 32 is detected, check the desired and actual pintle position. If both of these parameters have a percent open value in them, but they do not closely match each other, the sensor may be sticking in a certain position.

^ Make sure EGR valve gaskets and EGR valve are installed correctly or a vacuum leak will occur.

^ Verify 02 sensor ground (located on engine block below intake manifold left side). A loose or corroded ground will cause an intermittent DTC 32.