Circuit/System Testing
- Verify none of the following conditions exist:
- Disconnected, restricted, or damaged vacuum hoses
- Disconnected or damaged components
- Binding vacuum actuator linkage
- Linkage that is interfering with hoses, wiring, or any other components
- Internally binding IMT valve-Refer to Intake Manifold Replacement
.
- Ignition OFF, disconnect the vacuum supply hose at the vacuum reservoir.
- Connect a J 23738-A
to the supply hose of the vacuum reservoir.
- Engine running, test for 33 kPa (10 Hg)
of vacuum.
- If less than the specified range, test for a leak or restriction in the supply hose.
- Ignition OFF, connect a J 23738-A
to the supply port of the vacuum reservoir.
- Disconnect the vacuum outlet hose at the vacuum reservoir.
- Plug the vacuum outlet port of the vacuum reservoir, while applying vacuum to the vacuum reservoir.
- If the vacuum does not hold, replace the vacuum reservoir.
- Ignition OFF, connect the vacuum hoses to the vacuum reservoir.
- Disconnect the supply hose at the IMT valve solenoid.
- Connect a J 23738-A
to the vacuum supply hose at the IMT valve solenoid.
- Engine running, test for 33 kPa (10 Hg)
of vacuum.
- If less than 3the specified range, test for a leak or restriction in the supply hose.
- Ignition OFF, connect the supply hose to the IMT valve solenoid.
- Disconnect the outlet hose at the IMT valve solenoid.
- Connect a J 23738-A
to the outlet hose at the IMT valve solenoid.
- Engine running, test for 33 kPa (10 Hg)
of vacuum.
- If less than the specified range, replace the IMT valve solenoid.
- Ignition OFF, connect the outlet hose to the IMT valve solenoid.
- Disconnect the supply hose at the vacuum actuator.
- Connect a J 23738-A
to the outlet hose at the IMT valve solenoid.
- Engine running, test for 33 kPa (10 Hg)
of vacuum.
- If less than the specified range, test for a leak or restriction in the supply hose.
- If greater than the specified range, replace the vacuum actuator.