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DTC P0403 Exhaust Gas Recirculation Control Circuit
WIRING DIAGRAM
4
WHT/BLU
BLK/YEL
3
80A
60A 15A
C64
7
6
5
4
3
17
16
15
14
13
12
11
27
26
25
24
23
22
21
34
33
32
31
1. Main relay
2. EGR valve
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
EGR valve output voltage is low although ECM com-
manded EGR valve to turn OFF.
(1 driving cycle detection logic)
DTC CONFIRMATION PROCEDURE
WARNING:
• When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) With ignition switch turned OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm it up to normal operating temperature.
4) Drive vehicle in 2000 – 3500 rpm of engine speed.
5) Keep above vehicle speed for 1 min. (Throttle valve opening is kept constant in this step.)
6) Stop vehicle and check DTC and pending DTC.
BLK/YEL
1
BLK/YEL
BLK/RED
BLK/YEL
BLK/RED
2
BLK/RED
BLK/RED
C63
2
1
7
6
5
4
3
10
9
8
19
18
17
16
15
14
13
12
20
19
18
27
26
25
24
30
29
28
35
34
33
32
3. Relay/fuse box
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-127
BLK/WHT
G91-28
BRN/WHT
C64-15
G91-6
BLK/RED
BLK/RED
G91-5
GRN/RED
C64-17
C64-34
GRN/ORN
C64-16
WHT/RED
BRN/YEL
C64-33
G91
2
1
6
5
4
3
11
10
9
8
16
15
14
13
12
11
10
23
22
21
20
27
26
25
24
23
22
21
20
31
30
29
28
35
34
33
32
31
4. Ignition switch
• EGR valve circuit open
• EGR valve
• ECM
C63-1
C64-2
C64-1
12V
5V
2
1
9
8
7
19
18
17
30
29
28
TROUBLE AREA
BLK/ORN
BLK
BLK/ORN
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