Mazda CX-7 2007 Workshop Manual page 295

DTC P2503 Charging system voltage low
GENERATOR
GENERATOR
WIRING HARNESS-SIDE CONNECTOR
B
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related Service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 INSPECT DRIVE CHAIN CONDITION
• Verify that the drive chain auto tensioner
indicator mark does not exceed limit.
• Is the front drive chain normal?
4 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
5 INSPECT GENERATOR CONNECTOR FOR
POOR CONNECTION
• Disconnect the generator connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
ON-BOARD DIAGNOSTIC [L3 WITH TC]
5
6
D
8
5
7
P
9
5
B
-
BATTERY
1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M
1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z 1V 1R 1N
D P
*
1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O
1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X
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
INSPECTION
PCM
4
2AI
4
2AJ
1BE
+
PCM
WIRING HARNESS-SIDE CONNECTOR
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
Yes Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the next step.
No Replace the and/or adjust drive chain, then go to Step 10.
Yes Repair the terminals, then go to Step 10.
No Go to the next step.
Yes Repair or replace the terminals, then go to Step 10.
No Go to the next step.
MAIN RELAY
4
1I 1E 1A
1J 1F 1B
1K 1G 1C
1T 1P 1L 1H 1D
2I 2E 2A
2J 2F 2B
2K 2G 2C
2L 2H 2D
ACTION
01-02–253
01-02