Circuit Open/Short Inspection - Mazda CX-7 2007 Workshop Manual

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See 01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following wiring harnesses for open or
short circuit (continuity check).
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
Open circuit
• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
— EGR valve terminal A and PCM terminal 2AM
— EGR valve terminal B and PCM terminal 2AR
— EGR valve terminal C or D and main relay terminal E
— EGR valve terminal E and PCM terminal 2AQ
— EGR valve terminal F and PCM terminal 2AN
Short circuit
• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
— EGR valve terminal A and power supply
— EGR valve terminal A and body ground
— EGR valve terminal B and power supply
— EGR valve terminal B and body ground
— EGR valve terminal C or D and body ground
— EGR valve terminal E and power supply
— EGR valve terminal E and body ground
— EGR valve terminal F and power supply
— EGR valve terminal F and body ground
3. Remove the EGR valve, and inspect for any damage or clogging.
• If there is no damage or clogging, replace the EGR valve. (See 01-16-11 EGR VALVE REMOVAL/
INSTALLATION[L3 WITH TC])
End Of Sie
WM: PCV VALVE
EMISSION SYSTEM [L3 WITH TC]
PCM
WIRING HARNESS-SIDE CONNECTOR
2E 2A 1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
2I
2J 2F 2B 1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z 1V 1R 1N
2K 2G 2C 1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
2H 2D 1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
2L
EGR VALVE
WIRING HARNESS SIDE CONNECTOR
E C A
F D B
FUSE BOX
(MAIN RELAY)
B
FRONT
E
A
D
1T 1P
01-16
acxuuw00000051
acxuuw00002336
1I 1E 1A
1J 1F 1B
1K 1G 1C
1L 1H 1D
acxuuw00000052
01-16–13