Code 72: Traction Control Vent Solenoid
NOTE:
For component terminal identification, see TERMINAL IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
article in this section.
- Turn ignition switch to ON position. Using a scan tester, actuate ventilation solenoid. With solenoid actuated, operating noise should be heard. If operating noise is not heard, go to next step. If operating noise is heard, go to step 4.
- Disconnect ventilation solenoid and fuel injection relay connectors. Using DVOM, check for continuity between ventilation solenoid connector terminal No. 1 and fuel injection relay connector terminal No. 5. If continuity does not exist, repair wiring harness as necessary. If continuity exists, go to next step.
- Disconnect ECM connector. Ground ECM connector terminal No. 105. Check continuity between chassis ground and ventilation solenoid connector terminal No. 2. If continuity does not exist, repair wiring harness as necessary. If continuity exists, check solenoid vacuum. Go to next step.
- Remove vacuum hoses from solenoid. Ensure solenoid harness connector is disconnected. Connect a vacuum pump to solenoid nipple "A". Use jumper wires to connect battery voltage to solenoid terminals. See Fig 1 . With vacuum applied, nipple "B" unplugged, and negative jumper wire connected, solenoid should hold vacuum.
- With vacuum applied, nipple "B" unplugged, and negative jumper wire disconnected, solenoid should not hold vacuum. With vacuum applied, nipple "B" plugged, and negative jumper wire disconnected, solenoid should hold vacuum.
- If solenoid tests as described, check resistance between solenoid terminals. If resistance is not 36-44 ohms at 68°F (20°C), replace solenoid. If resistance is as specified, go to CODE 71: TRACTION CONTROL VACUUM SOLENOID .