Dtc C1122: Engine Speed Signal - Suzuki 2006 SX4 Service Manual

Step
5 BCM voltage check
1) With ignition switch turned OFF, connect BCM
connector.
2) Check BCM for vehicle speed signal output referring to
"Inspection of P/S Control Module and Its Circuits".
Is it in good condition?
6 Vehicle speed signal circuit check
1) Check that vehicle speed signal circuit is as follows.
• Insulation resistance of wire harness is infinity
between "Vehicle speed signal" terminal and other
terminal at P/S control module connector.
• Wiring harness resistance of "Vehicle speed signal"
circuit is less than 1Ω.
• Insulation resistance between "Vehicle speed signal"
circuit and vehicle body ground is infinity.
• Circuit voltage between "Vehicle speed signal" circuit
and ground circuit is 0 – 1 V with ignition switch turned
ON.
Is it in good condition?

DTC C1122: Engine Speed Signal

Wiring Diagram
WHT
2
1
8
5
4
[A]: P/S control module connector No.1 "E11" (viewed from harness side)
[B]: P/S control module connector No.2 "E13" (viewed from harness side)
1. Main fuse box
2. Ignition switch
3. Junction block assembly
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)
Action
7
9
GRN
E13-1
3
10
LT GRN/
GRN E11-1
BLK
E13-2
BLK
12V
E01-44 BRN
E11-12
11
Power Assisted Steering System:
Yes
Replace P/S control
module.
Replace P/S control
module.
6
[A]
12V
11 12 13 14 15 16 17 18 19 20
1 2 3 4
4. Main fuse
5. ECM
6. P/S control module
7. Individual circuit fuse box No.1
8. "IGN" fuse
Trouble area
• Engine speed signal circuit
• ECM
• P/S control module
No
Replace BCM.
Repair or replace
defective circuit.
S6RW0C6304015
[B]
1
5 6 7 8 9 10
2
I6RW0C630007-01
9. "P/S" fuse
10. "IG1 SIG" fuse
11. Engine speed signal circuit
6C-25