Suzuki 2006 SX4, Service Manual

Page: 827 / 1478

Power Assisted Steering System: 6C-25
DTC C1122: Engine Speed Signal
S6RW0C6304015
Wiring Diagram
DTC Detecting Condition and Trouble Area
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?
Replace P/S control
module. Replace BCM.
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 1
Ω
.
• 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?
Replace P/S control
module. Repair or replace
defective circuit.
Step Action Yes No
[A]
1 2 3 4 5 6 7 8 9
11
10
12 13 14 15 16 17 18 19 20
1
2
[B]
BRN
LT GRN/
BLK
E11-1
E11-12
E13-1 GRN
GRN
WHT
6
3
7
9
10
8
4
1
2
12V
E13-2
BLK
12V
5
11
E01-44
I6RW0C630007-01
[A]: P/S control module connector No.1 “E11” (viewed from harness side) 4. Main fuse 9. “P/S” fuse
[B]: P/S control module connector No.2 “E13” (viewed from harness side) 5. ECM 10. “IG1 SIG” fuse
1. Main fuse box 6. P/S control module 11. Engine speed signal circuit
2. Ignition switch 7. Individual circuit fuse box No.1
3. Junction block assembly 8. “IGN” fuse
DTC detecting condition Trouble area
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) • Engine speed signal circuit
• ECM
• P/S control module