Diagnosis Procedure
- CHECK ECM POWER SUPPLY
- Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
- Check the voltage between ECM harness connector terminals.
ECM
Voltage
+
-
Connector
Terminal
Connector
Terminal
F14
86
E10
152
Battery voltage
Is the inspection result normal?
YES
GO TO 2.
NO
Refer to Diagnosis Procedure .
- CHECK CONDENSER-1 POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect condenser-1 harness connector.
- Turn ignition switch ON.
- Check the voltage between condenser-1 harness connector and ground.
+
-
Voltage
Condenser-1
Connector
Terminal
F26
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 4.
NO
GO TO 3.
- CHECK CONDENSER-1 POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between IPDM E/R harness connector and condenser-1 harness connector.
IPDM E/R
Condenser-1
Continuity
Connector
Terminal
Connector
Terminal
F50
55
F26
1
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
Refer to Diagnosis Procedure .
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK CONDENSER-1 GROUND CIRCUIT
- Turn ignition switch OFF.
- Check the continuity between condenser-1 harness connector and ground.
Condenser-1
Ground
Continuity
Connector
Terminal
F26
2
Ground
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 5.
NO
Repair open circuit or short to power in harness or connectors.
- CHECK CONDENSER-1
Check condenser-1. Refer to Component Inspection (Condenser-1)
Is the inspection result normal?
YES
GO TO 6.
NO
Replace condenser-1.
- CHECK IGNITION COIL POWER SUPPLY
- Reconnect all harness connectors disconnected.
- Disconnect ignition coil harness connector-1.
- Turn ignition switch ON.
- Check the voltage between ignition coil harness connector and ground.
+
-
Voltage
Ignition coil
Cylinder
Connector
Terminal
1
F34
3
Ground
Battery voltage
2
F35
3
3
F36
3
4
F37
3
5
F38
3
6
F39
3
Is the inspection result normal?
YES
GO TO 7.
NO
Repair or replace harness or connectors.
- CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between ignition coil harness connector and ground.
Ignition coil
Ground
Continuity
Cylinder
Connector
Terminal
1
F34
2
Ground
Existed
2
F35
2
3
F36
2
4
F37
2
5
F38
2
6
F39
2
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 8.
NO
Repair open circuit or short to power in harness or connectors.
- CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Disconnect ECM harness connector.
- Check the continuity between ignition coil harness connector and ECM harness connector.
Ignition coil
ECM
Continuity
Cylinder
Connector
Terminal
Connector
Terminal
1
F34
1
F14
113
Existed
2
F35
1
106
3
F36
1
103
4
F37
1
114
5
F38
1
107
6
F39
1
104
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 9.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK IGNITION COIL WITH POWER TRANSISTOR
Check ignition coil with power transistor. Refer to Component Inspection (Ignition Coil with Power Transistor) .
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Replace malfunctioning ignition coil with power transistor. Refer to Removal and Installation (LH) , Removal and Installation (RH) .