Dtc P0327 / P0328: Knock Sensor Circuit Low / High - Suzuki SX4 Service Manual

1A-112 Engine General Information and Diagnosis:
Step
11 Engine mechanical system check
1) Check engine mechanical parts or system which can
cause engine rough idle or poor performance.
• Engine compression (Refer to "Compression Check in
Section 1D".)
• Valve lash (Refer to "Valve Lash (Clearance)
Inspection in Section 1D".)
• Valve timing (Refer to "Timing Chain and Chain
Tensioner Removal and Installation in Section 1D".)
Are they in good condition?

DTC P0327 / P0328: Knock Sensor Circuit Low / High

Wiring Diagram
1
15 14 13 12 11
30 29 28 27 26
44
45 43 42 41
59
60 58 57 56
DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC P0327:
Voltage of knock sensor is lower than specified value with engine
running.
(1 driving cycle detection logic)
DTC P0328:
Voltage of knock sensor is higher than specified value with
engine running.
(1 driving cycle detection logic)
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and run it for 10 sec.
4) Check DTC by using scan tool.
Action
E01
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
1. Knock sensor
Check wire harness and
connection of ECM
ground, ignition system
and fuel injector for
intermittent open and
short.
RED
2 1 15 14 13 12 11
17 16 30 29 28 27 26
44
32 31 45 43 42 41
59
47 46 60 58 57 56
2. ECM
• Knock sensor circuit (open or short)
• Knock sensor
• ECM
Yes
Repair or replace
defective part.
2
5 V
C01-56
C01
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
Trouble area
No
S7RW0A1104042
2 1
17 16
32 31
47 46
I6RW0D110030-01