Idle Speed Control Inspection

ON-VEHICLE INSPECTION
1. INSPECT Idle Speed Control (ISC) VALVE RESISTANCE:
(a) Disconnect the ISC valve connector.
(b) Using an ohmmeter, measure the resistance between terminals +B and other terminals (ISC1,ISC2).

Resistance: 18.8-22.8 ohms

If the resistance is not as specified, replace the ISC valve.

2. INSPECT ISC VALVE OPERATION:
(a) Initial conditions:
- Engine at normal operating temperature.
- Transmission in neutral range.

(b) Using SST (09843-18020), connect terminals TE1 and E1 of the check connector.
(c) After engine rpm are kept at 1,000-1,200 rpm for 5 seconds, check that the rpm drops about 200 rpm.




If the rpm operation is not as specified, check the ISC valve, wiring and engine ECU.

(d) Remove SST (O9843-8O2O).




REMOVAL OF ISC VALVE
1. REMOVE THROTTLE BODY.
2. REMOVE ISC VALVE:
(a) Remove the BVSV.
(b) Remove the four screws, ISC valve and gasket.




INSTALLATION OF ISC VALVE
1. INSTALL ISC VALVE:
(a) Place a new 0-ring on the throttle body.




(b) Install ISC valve with the four screws.




(c) Apply sealant to the threads of the BVSV.

Sealant: Part No.08833-00070, THREE BOND 1324 or equivalent.




(d) Install the BVSV. First temporarily torque the BVSV at 125 kg/cm (9 ft.lbs., 12 Nm). Then torque the BVSV port until it is in the position shown in the illustration.

Maximum torque 350 kg/cm (25 ft.lbs., 34 Nm).

NOTE: Do not turn the port anti-clockwise in order to align the port as shown in the illustration.

2. INSTALL THROTTLE BODY.