Suzuki WagonR+ RB310 Service Manual page 660

Troubleshooting
Step
1 Was "Engine and Emission Control System
Check" performed?
2 Check TP sensor and its circuit.
1) Connect scan tool to DLC with ignition
switch turned OFF and then turn ignition
switch ON.
2) Check throttle valve opening percentage
displayed on scan tool.
3) Check throttle valve opening percentage
displayed on scan tool while opening throttle
valve from idle position to full open position.
Is it displayed 100%?
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 connector at
"E22-8" and "E22-34" wire terminals.
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 connec-
tor 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 connector from ECM with igni-
tion switch turned OFF.
2) Turn ON ignition switch.
3) Check voltage between "WHT/GRN" wire
terminal of TP sensor connector and body
ground and between "GRY" wire terminal of
TP sensor connector and body ground.
Is voltage about 0 V at each terminal?
ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-89
Action Yes
Go to Step 2.
Go to Step 3.
Go to Step 6.
"GRY/RED" and/or "GRY/
BLU" wire open circuit.
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 7.
No
Go to "Engine and Emis-
sion Control System
Check" in this section.
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 power cir-
cuit.
If wire are OK, substitute
a known-good ECM and
recheck.