Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Ignition OFF, disconnect the boost source hose from the boost control solenoid. Connect the J 23738-A to the boost source hose. See Special Tools .
- Engine running, observe the gage on the J 23738-A
for a reading equal to or greater than 15 in Hg. See Special Tools
.
- If less than 15 in Hg, repair the boost vacuum source hose or the intake manifold port for a restriction or blockage.
- Ignition OFF, connect the vacuum source hose to the boost solenoid.
- If less than 18 in Hg, then repair the boost signal hose for a restriction or blockage.
- Disconnect the boost signal hose from the bottom port of the bypass valve actuator and connect the J 23738-A to the boost signal hose. See Special Tools .
- Engine running, observe the gage on the J 23738-A
for a reading of 0-1 in Hg. See Special Tools
.
- If greater than the specified range, replace the boost control solenoid.
- Engine running, command the boost control solenoid to 0 percent DC with a scan tool. Observe the gage on the J 23738-A
for a reading equal to or greater than 15 in Hg. See Special Tools
.
- If less than the specified range, test the boost signal hose for a restriction or blockage. If the boost signal hose tests normal, replace the boost control solenoid.
- Disconnect the inlet vacuum signal hose from the top of the bypass valve actuator, and connect the J 23738-A to the inlet vacuum signal hose. See Special Tools .
- Engine running, observe the gage on the J 23738-A
for a reading equal to or greater than 15 in Hg. See Special Tools
.
- If less than 15 in Hg, repair the inlet vacuum signal hose or the intake manifold port for a restriction or blockage.