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 and EGR Control-BPT valve. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Replace EGR valve and/or EGR Control-BPT 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. 105 (Purple wire) and ground. At 4000 RPM, voltage should be .6-.8 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 and canister control solenoid valve harness connector. Verify harness continuity between ECM terminal No. 105 (Purple wire) and ground, and EGR and canister control solenoid valve harness connector terminal "a" (Purple 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, EGR and canister control solenoid valve, as necessary.

Fig 3: Locating EGR & Canister Control Solenoid Valve Harness Conn.
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 and canister control solenoid valve. See I -SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Measure resistance of EGR temperature sensor. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Replace EGR and canister control solenoid valve and/or EGR temperature sensor if necessary and perform FINAL CHECK .
Check Component Using CONSULT - Turn ignition off and connect CONSULT. Connect ECM harness connector and EGR and canister control solenoid valve harness connector. Turn ignition on. Using CONSULT, perform EGRC SOL/V CIRCUIT in FUNCTION TEST mode. Replace EGR and canister 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 and canister control solenoid valve if operating sounds are not heard. Perform FINAL CHECK .