Suzuki 2006 SX4, Service Manual

Page: 117 / 1478

Engine General Information and Diagnosis: 1A-73
3 Wire harness check
1) Turn ignition switch OFF position.
2) Disconnect connectors from TP sensor and ECM.
3) Check for proper terminal connection to electric throttle
body assembly and ECM connectors.
4) If connections are OK, check that TP sensor (main)
circuit is as follows.
• Wiring harness resistance of each TP sensor (main)
signal, power supply and ground circuit is less than
3
Ω
.
• Insulation resistance of each TP sensor (main) signal
and power supply circuit is infinity between TP sensor
connector and vehicle body ground.
• Insulation resistance of wire harness is infinity
between TP sensor (main) signal terminal and each
other terminal at TP sensor connector.
• Circuit voltage of each TP sensor (main) signal, power
supply and ground circuit is 0 – 1 V with ignition
switch turned ON.
Are they in good condition?
Go to Step 4. Repair or replace
defective wire harness.
4 TP sensor circuit voltage check
1) Connect connectors to ECM.
2) Turn ignition switch ON position.
3) Check that TP sensor circuit voltage is as follows.
• Between TP sensor power supply terminal and TP
sensor ground terminal is 5 V.
• Between TP sensor (main) signal terminal and TP
sensor ground terminal is 5 V.
Is it in good condition?
Go to Step 5. Substitute a known-
good ECM and recheck.
5 TP sensor check
1) Check TP sensor for performance referring to “Electric
Throttle Body Assembly On-Vehicle Inspection in
Section 1C”.
Is it in good condition?
Substitute a known-
good ECM and recheck. Replace electric throttle
body assembly.
Step Action Yes No