Dtc P0403[L3 With Tc] - Mazda CX-7 2007 Workshop Manual

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DTC P0403[L3 WITH TC]

DTC P0403 EGR valve (stepper motor) circuit malfunction
• PCM monitors the input voltage from the EGR valve. If the voltage remain low or high, the PCM determines
that the EGR valve circuit has a malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
DETECTION
• MIL illuminates if the PCM detects above malfunction condition in two consecutive drive cycles or in one
CONDITION
drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is not available.
• DTCs are not stored in the PCM memory.
• EGR valve malfunction
• Connector or terminal malfunction
• Short to the power supply in the wiring harness between EGR valve terminal E and PCM terminal 2AQ
• Short to the power supply in the wiring harness between EGR valve terminal A and PCM terminal 2AM
• Short to the power supply in the wiring harness between EGR valve terminal B and PCM terminal 2AR
• Short to the power supply in the wiring harness between EGR valve terminal F and PCM terminal 2AN
• Short to ground circuit in wiring harness between EGR valve terminal E and PCM terminal 2AQ
• Short to ground circuit in wiring harness between EGR valve terminal A and PCM terminal 2AM
POSSIBLE
• Short to ground circuit in wiring harness between EGR valve terminal B and PCM terminal 2AR
CAUSE
• Short to ground circuit in wiring harness between EGR valve terminal F and PCM terminal 2AN
• Open circuit in the wiring harness between EGR valve terminal E and PCM terminal 2AQ
• Open circuit in the wiring harness between EGR valve terminal A and PCM terminal 2AM
• Open circuit in the wiring harness between EGR valve terminal B and PCM terminal 2AR
• Open circuit in the wiring harness between EGR valve terminal F and PCM terminal 2AN
• Open circuit in the wiring harness between main relay terminal D and EGR valve terminal C
• Open circuit in the wiring harness between main relay terminal D and EGR valve terminal D
• PCM malfunction
MAIN RELAY
EGR VALVE
3
C
C
4
3
D
EGR VALVE
WIRING HARNESS SIDE CONNECTOR
E
F
ON-BOARD DIAGNOSTIC [L3 WITH TC]
9
3
6
E
9
3
6
A
5
9
3
6
B
9
3
6
F
C A
D B
PCM
8
7
2AQ
8
7
2AM
8
7
2AR
8
7
2AN
PCM
WIRING HARNESS SIDE CONNECTOR
2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z 2V 2R 2N
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
id010239807100
01-02
2I 2E 2A
2J 2F 2B
2K 2G 2C
2L 2H 2D
01-02–133