Suzuki Wagon R Plus RB310 Service Manual page 261

6-2-86 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
Step
2 Check TP sensor and its circuit.
1) Connect scan tool to DLC with ignition
switch turned OFF and then turn ON ignition
switch.
2) Check throttle valve opening percentage dis-
played on scan tool.
3) Check throttle valve opening percentage dis-
played on scan tool while opening throttle
valve from idle position to full open position.
Is it displayed 0%?
3 Check wire harness.
1) Disconnect connector from TP sensor with
ignition switch turned OFF.
2) Check for proper connection to TP sensor at
"WHT/GRN", "GRY" and "BRN/WHT" wire
terminals.
3) If OK, then with ignition switch turned ON,
check for the following terminal voltages.
• Between "WHT/GRN" terminal of TP sensor
connector and body ground
• Between "GRY" terminal of TP sensor con-
nector and body ground (See Fig. 1)
Is each terminal voltage about 4 – 6 V?
4 Check ECM voltage.
1) Check for proper connection of ECM con-
nector at "E22-8" and "E22-34" wire termi-
nals.
2) If OK, disconnect connector from MAP sen-
sor.
3) Turn ignition switch to ON position.
4) Check for the following terminal voltages.
• Between "E22-8" terminal of ECM connector
and body ground
• Between "E22-34" terminal of ECM connec-
tor and body ground
Is each terminal voltage about 4 – 6 V?
5 Check wire circuit.
1) Disconnect connectors from ECM with igni-
tion switch turn OFF.
2) Check that there is insulation between
"WHT/GRN" wire terminal of TP sensor con-
nector and body ground and between "GRY"
wire terminal of TP sensor connector and
body ground.
Is there insulation?
Action Yes
Go to Step 3.
Go to Step 5.
Check MAP sensor refer-
ring to "Manifold Absolute
Pressure Sensor (MAP
Sensor) Inspection" in
Section 6E2.
If they are OK, go to Step
5.
Go to Step 6.
No
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection" in Section 0A.
Go to Step 4.
Go to Step 5.
"WHT/GRN" and/or
"GRY" wire shorted to
ground circuit.
If wires are OK, substitute
a known-good ECM and
recheck.