Dtc P0327 / P0328: Knock Sensor Circuit Low / High - Suzuki Grand Vitara 2011 Manual

1A-129 Engine General Information and Diagnosis: For Petrol Engine Model
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:
For J20 Engine in Section 1D" or "Compression
Check: For M16A Engine with VVT in Section 1D".)
• Valve lash (Refer to "Valve Lash (Clearance)
Inspection: For J20 Engine in Section 1D" or "Valve
Lash (Clearance) Inspection: For M16A Engine with
VVT in Section 1D".)
• Valve timing (Refer to "2nd Timing Chain and Chain
Tensioner Removal and Installation: For J20 Engine in
Section 1D" or "Timing Chain and Chain Tensioner
Removal and Installation: For M16A Engine with VVT
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 28 27 26
29
45 44 43 42 41
59
60 58 57 56
DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC P0327:
Voltage of knock sensor is less than 1.2 V for 0.5 sec
continuously
(1 driving cycle detection logic)
DTC P0328:
Voltage of knock sensor is more than 3.9 V for 0.5 sec
continuously
(1 driving cycle detection logic)
Action
E23
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
Check wire harness and
connection of ECM
ground, ignition system
and fuel injector for
intermittent open and
short.
WHT
2 1 15 14 13 12 11
17 16 30 28 27 26
29
32 31 45 44 43 42 41
59
47 46 60 58 57 56
1. Knock sensor
2. ECM
• Knock sensor circuit (open or short)
• Knock sensor
• ECM
Yes
Repair or replace
defective part.
2
5 V
C37-56
C37
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
S6JB0A1114040
2 1
17 16
32 31
47 46
I5JB0A110046-01