On Board Diagnosis Logic
The ECM checks if battery voltage is within the tolerance range for the engine control system.
Malfunction is detected when ... Check Items (Possible Cause)
+ An abnormally high voltage from the battery is sent to ECM. +Incorrect jump starting
+ Battery
+ Alternator
+ ECM
DTC Confirmation Procedure
With CONSULT-II
1) Checkthefollowing.
+ Jumper cables are connected for jump starting.
+ Battery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-1146.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to EL section (ªCHARGING SYSTEMº).
4) Turn ignition switch ªONº and select ªDATA MONITORº mode with CONSULT-II.
5) Wait one minute.
6) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146. If DTC is not detected, go to next step.
7) Start engine and wait one minute at idle.
8) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146.
Without CONSULT-II
1) Checkthefollowing.
+ Jumper cables are connected for jump starting.
+ Battery or alternator has been replaced.
If the result is ªYesº for one item or more, skip the following steps and go to ªDiagnostic Procedureº,
EC-1146.
2) Check that the positive battery terminal is connected to battery properly. If NG, reconnect it properly.
3) Check that the alternator functions properly. Refer to EL section (ªCHARGING SYSTEMº).
4) Turn ignition switch ªONº and wait one minute.
5) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
6) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
7) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146. If DTC is not detected, go to next step.
8) Start engine and wait one minute at idle.
9) Turn ignition switch ªOFFº, wait 5 seconds and then turn ªONº.
10) Perform ªDiagnostic Test Mode II (Self-diagnostic result)º with ECM.
11) If DTC is detected, go to ªDiagnostic Procedureº, EC-1146.
Diagnostic Procedure
1 INSPECTION START
Are jumper cables connected for the jump starting?
Yes or No
Yes cGO TO 3.
No cGO TO 2.
DTC 0502 BATTERY VOLTAGEZD30DDTi
EC-1146
2 CHECK BATTERY AND ALTERNATOR
Check that the proper type of battery and alternator is installed.
Refer to EL section (ªBATTERYº and ªCHARGING SYSTEMº).
OK or NG
OKcGO TO 5.
NGcReplace with a proper one.
3 CHECK JUMPER CABLES INSTALLATION
Check that the jumper cables are connected in the correct sequence.
SEF488Z
OK or NG
OKcGO TO 4.
NGcReconnect jumper cables properly.
4 CHECK BATTERY FOR BOOSTER
Check that the battery for the booster is a 12V battery.
OK or NG
OKcGO TO 5.
NGcChange the vehicle for booster.
5 PERFORM DTC CONFIRMATION PROCEDURE AGAIN
Perform ªDTC Confirmation Procedureº, EC-1146, again.
OK or NG
OKcGO TO 6.
NGcReplace ECM.
6 CHECK ELECTRICAL PARTS DAMAGE
Check the following for damage.
+Wiring harness and harness connectors for burn
+Fuses for short
OK or NG
OKcINSPECTION END
NGcRepair or replace malfunctioning part.
DTC 0502 BATTERY VOLTAGEZD30DDTi
Diagnostic Procedure (Cont'd)
EC-1147
