DTC 32: EGR Function (CALIF.)

Check Vacuum Source To EGR Valve - Start engine and bring to operating temperature. With engine speed at about 2000 RPM, disconnect vacuum hose to EGR valve. See Fig 1 . If vacuum is not present, go to next step. If vacuum is present, inspect EGR valve. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Replace EGR valve if necessary and perform FINAL CHECK .

Fig 1: DTC 32, Checking Vacuum Source To EGR Valve
Courtesy of NISSAN MOTOR CO., U.S.A.
Check Control Function - If vacuum is not present, with engine running, measure voltage between ECM terminal No. 102 (Red/Black wire) and ground. At idle, voltage should be zero volts. At 2000 RPM, voltage should be battery voltage. See Fig 2 . If voltage measured is not as specified, go to next step. If voltage is as specified, inspect vacuum hose for clogging, cracks or proper connection. Repair vacuum hose as necessary.

Fig 2: DTC 32, Checking Control Function
Courtesy of NISSAN MOTOR CO., U.S.A.
Check Output Signal Circuit - Turn engine off and disconnect ECM harness connector. Disconnect EGR control solenoid valve harness connector. Verify harness continuity between ECM terminal No. 102 (Red/Black wire) and ground, and between EGR control solenoid valve harness connector terminal "a" (Red/Black wire) and ground. See Fig 3 and Fig 4 . If continuity does not exist, go to next step. If there is continuity, repair harness or connectors between ECM and EGR control solenoid valve as necessary.

Fig 3: Locating EGR Control Solenoid Valve Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: DTC 32, Checking Output Signal Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.
Check Component - Inspect EGR control solenoid valve. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Replace EGR control solenoid valve if necessary and perform FINAL CHECK .
Check Component Using CONSULT - Turn ignition off and connect CONSULT. Connect ECM harness connector and EGR control solenoid valve harness connector. Turn ignition on. Using CONSULT, perform EGRC SOL/V CIRCUIT in FUNCTION TEST mode. Replace EGR control solenoid valve if necessary. Another method is to turn EGR and canister control solenoid valve ON and OFF using CONSULT in ACTIVE TEST mode. Replace EGR control solenoid valve if operating sounds are not heard. Perform FINAL CHECK .