Suzuki Wagon R Plus RB310, Service Manual

Page: 472 / 846

ENGINE AND EMISSION CONTROL SYSTEM (M13 ENGINE) 6E2-19
Throttle body cleaning
Clean throttle body bore (1) and idle air passage (2) by blowing
compressed air.
Idle air control (IAC) valve operation check
Using Suzuki Scan Tool
1) Connect SUZUKI scan tool to DLC (1) with ignition switch
OFF.
Special tool
(A): SUZUKI scan tool
2) Warm up engine to normal operating temperature.
3) Clear DTC and select “MISC TEST” mode on SUZUKI scan
tool.
4) Check that idle speed increases and/or reduces when IAC
valve is opened and/or when closed by SUZUKI scan tool.
If idle speed does not change, check IAC valve and wire har-
ness.
Not Using SUZUKI Scan Tool
1) Warm up engine to normal operating temperature.
2) Stop engine.
3) Turn ignition switch to ON position.
4) Disconnect IAC valve connector.
5) Start engine.
6) Connect IAC valve connector.
7) Check that idle speed increases and/or reduces when con-
nector is connected to IAC valve.
If idle speed does not change, check IAC valve and wire har-
ness.
Idle air control (IAC) valve removal and installation
Removal
1) Remove throttle body referring to “Throttle Body Removal
and Installation” in this section.
2) Remove IAC valve from throttle body.
NOTE:
TP sensor, idle air control valve or other components
containing rubber must not be placed in a solvent or
cleaner bath. A chemical reaction will cause these parts
to swell, harden or get distorted.
2
1
1
(A)