Dtc P0340: Camshaft Position Sensor "A" Circuit; System Description - Suzuki 2006 SX4 Service Manual

1A-90 Engine General Information and Diagnosis:

DTC P0340: Camshaft Position Sensor "A" Circuit

Wiring Diagram
GRN
5
WHT
6 9
7
15 14 13 12 11
30 28 27 26
29
45 44 43 42 41
59
60 58 57 56
P: CMP sensor power supply circuit
S: CMP sensor signal circuit
G: CMP sensor ground circuit

System Description

The CMP sensor located on the cylinder head cover consists of the signal generator (magnetic sensor) and signal
rotor (intake camshaft portion).
The signal generator generates reference signal through slits in the slit plate which turns together with the camshaft.
Reference signal
The CMP sensor generates 6 pulses of signals each of which has a different waveform length while the camshaft
makes one full rotation. Refer to "Inspection of ECM and Its Circuits".
Based on these signals, ECM judges which cylinder piston is in the compression stroke and the engine speed.
DTC Detecting Condition and Trouble Area
If either of the following condition is fulfilled:
• CMP sensor pulse is lower than 20 pulses per crankshaft 8 revolutions.
• CMP sensor pulse is higher than 28 pulses per crankshaft 8 revolutions.
• CMP sensor pulse is lower than 20 pulses per crankshaft 8 revolutions
from engine start.
(1 driving cycle detection logic)
8
4
BLK/YEL BLK/YEL
BLK/YEL
1
BLK/ORN
2
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. CMP sensor
2. Signal sensor
3. ECM
DTC detecting condition
BLK/WHT
BRN/WHT
BLK/RED BLK/RED
P
BLK/RED BLK/RED
S
RED/YEL
G
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
4. Main relay
5. Ignition switch
6. Fuse box No.2
3
E01-29
C01-15
C01-30
C01-29
C01-48
BLK/ORN
E01-60
C01-58
BLK/ORN
12V
5V
E01-1
5V
E01-16
C01-52
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
7. "FI" fuse
8. "IG COIL" fuse
9. "IGN" fuse
Trouble area
• CMP sensor and/or its circuit
• Signal rotor teeth damaged
• ECM
S6RW0C1104038
BLK
BLK
BLK
2 1
17 16
32 31
47 46
I6RW0C110013-01