Dtc C1122: Engine Speed Signal - Suzuki Swift Sport 2004 Service & Repair Manual

6C-28 Power Assisted Steering System:

DTC C1122: Engine Speed Signal

NOTE
DTC C1122 (engine speed signal failure) is indicated when ignition switch is at ON position and engine
is not running, but means there is nothing abnormal if indication changes to a normal one when
engine is started.
Wiring Diagram
Refer to "DTC C1121 / C1123 / C1124: VSS Circuit Failure".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Engine speed signal is less than 220 rpm for more than
0.8 seconds.
or
Engine speed signal is less than 220 rpm for more than 20
seconds continuously even though vehicle speed signal is
more than 50 km/h.
(1 driving cycle detection logic)
Trouble area
• Engine speed signal circuit
• ECM
• P/S control module
• Vehicle speed signal circuit
S7RS0B6304018