Suzuki Liana RH413, Service Manual

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1A-97 Engine General Information and Diagnosis:
DTC P0505: Idle Control System Malfunction
S3RH0A1104058
System / Wiring Diagram
DTC Detecting Condition and Possible Cause
13 Check vehicle speed signal circuit for short
1) Turn ignition switch OFF position.
2) Disconnect connector from ECM and combination meter.
3) Turn ignition switch ON position without engine running.
4) Measure voltage from terminal “PPL” wire of TCM
connector to ground.
Is voltage 0 V?
Go to Step 14. “PPL” wire shorted to
power supply.
14 Check VSS and its circuit
1) Check VSS and its circuit referring to “DTC P0720 (No.
31): Output Speed Sensor / VSS Circuit Malfunction in
Section 5A”.
Is it result satisfactory?
Go to Step 15. Repair or replace for
VSS and its circuit.
15 Check vehicle speed signal circuit for short
1) Turn ignition switch OFF position.
2) Disconnect connector from combination meter.
3) Turn ignition switch ON position without engine running.
4) Measure voltage from terminal “PPL” wire of TCM
connector to ground.
Is voltage 4 – 5 V?
Faulty speedometer. “PPL” wire open or
shorted to ground.
Substitute a known-
good ECM and recheck.
Step Action Yes No
C41 (31P) G04 (24P) G03 (17P)
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21
22 23 24 25 26 28 27 29 30 31
5 6 1 2 3 4 5 6 7
11 12
9 10 11 13 12 14 15 16
16 17
1 2
7 8
13 14
3 4
9 10
15 17 18
8
19 20 21 22 23 24
2
1
3
4
C41-6
G04-5
G04-6
G04-10
GRN/RED
BLK
BLK/RED
BRN/WHT
BLK/RED
ECM
I2RH0B110066-01
1. Ignition switch 3. Main relay
2. Battery 4. IAC valve
DTC detecting condition Possible cause
• No closed signal to IAC valve is detected after engine start.
*2 driving cycle detection logic, continuous monitoring • “BLK/RED”, “GRN/RED” or “BLK” circuit open
or short
• IAC valve malfunction
• ECM malfunction