Suzuki 2006 SX4, Service Manual

Page: 131 / 1478

Engine General Information and Diagnosis: 1A-87
DTC P0327 / P0328: Knock Sensor Circuit Low / High
S6RW0C1104036
Wiring Diagram
DTC Detecting Condition and Trouble Area
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 1 minute.
4) Check DTC.
DTC Troubleshooting
1
2
A1
5V
C01-56
RED
E01 C01
3 4
18 19
5 6 7 10 11
17 20
47 46 49 50 51
21 22
52
16 25
9
24
14
29
55 57 54 53 59 60 58
2
26 27 28
15
30
56 48
32 31 34 35 36 37 40 42 39 38 44 45 43 41 33
1 12 13
23
8 3 4
18 19
5 6 7 10 11
17 20
47 46 49 50 51
21 22
52
16 25
9
24
14
29
55 57 54 53 59 60 58
2
26 27 28
15
30
56 48
32 31 34 35 36 37 40 42 39 38 44 45 43 41 33
1 12 13
23
8
I7RW01110055-02
A1: Knock sensor signal circuit 1. Knock sensor 2. ECM
DTC detecting condition Trouble area
DTC P0327:
Output voltage of knock sensor is lower than 1.23 V for 5 sec.
(1 driving cycle detection logic)
• Knock sensor and/or its circuit
• ECM
DTC P0328:
Output voltage of knock sensor is higher than 3.91 V for 5 sec.
(1 driving cycle detection logic)
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Knock sensor circuit voltage check
1) Turn ignition switch OFF position.
2) Disconnect connector from knock sensor.
3) Check for proper terminal connection to knock sensor
and ECM connectors.
4) If connections are OK, turn ignition switch to ON
position.
5) Check that circuit voltage is 5 V between knock sensor
signal circuit of knock sensor connector and vehicle
body ground.
Is it in good condition?
Replace knock sensor. Go to Step 3.