IMT (Intake Manifold Tuning) Vacuum Solenoid Valve On-Vehicle Inspection

WARNING: Do not apply vacuum using mouth; otherwise harmful fuel vapor can be breathed in.

CAUTION: Do not apply vacuum more than -86 kPa (-0.86 kgf/cm² , -12.47 psi, -0.86 bar); otherwise IMT vacuum solenoid valve could be damaged.

Prepare to operate IMT vacuum solenoid valve as follows.
1. Connect special tool (ECM check harness) between ECM and ECM connector. See INSPECTION OF ECM AND ITS CIRCUITS .
  Special Tool
  
  : 09933-06320
  
  CAUTION: ECM and its circuits should be checked by measuring voltage and pulse signal using special tool. It is strictly prohibited to connect voltmeter or ohmmeter to ECM.
  NOTE:
  Operate IMT vacuum solenoid valve using service wire as follows.
  - IMT vacuum solenoid valve OFF: Disconnect "C37-42" terminal from vehicle body ground [a]
  - IMT vacuum solenoid valve ON:
    Connect "C37-42" terminal to vehicle body ground [b]
    
    Fig 1: Connecting C37-42 Terminal To Vehicle Body Ground
    Courtesy of SUZUKI OF AMERICA CORP.
Disconnect vacuum hose No. 1 (1) from vacuum tank and vacuum hose No. 2 from IMT vacuum solenoid valve (2).
Install special tool to vacuum hose No. 1 (1).
Special Tool

(A): 09917-47011
Check that IMT vacuum solenoid valve (2) operates as follows.
If faulty condition is found, check the following.
- Wire harness and connections
- IMT vacuum solenoid valve
- Vacuum hoses
1. Operate the special tool and check that vacuum of -60 kPa (-0.6 kgf/cm² , -8.7 psi, -0.6 bar) can be applied when IMT vacuum solenoid valve is turned OFF [A].
2. Operate the special tool and check that no vacuum can be applied when IMT vacuum solenoid valve is turned ON [B].
  
  Fig 2: Checking Vacuum Of Solenoid Valve
  Courtesy of SUZUKI OF AMERICA CORP.