Diagnosis Procedure
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
- Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
- Check the voltage between ECM harness connector terminals under the following conditions.
ECM
Voltage
Connector
+
-
Terminal
Terminal
E16
145
152
Battery voltage
Is the inspection result normal?
YES
GO TO 2 .
NO
Go to Diagnosis Procedure .
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
- Turn ignition switch OFF.
- Disconnect condenser harness connector.
- Turn ignition switch ON.
- Check the voltage between condenser harness connector and ground.
Condenser
Ground
Voltage
Connector
Terminal
F21
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5 .
NO
GO TO 3 .
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-III
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between IPDM E/R harness connector and condenser harness connector.
IPDM E/R
Condenser
Continuity
Connector
Terminal
Connector
Terminal
E119
17
F21
1
Existed
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
Go to Diagnosis Procedure .
NO
GO TO 4 .
- DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between IPDM E/R and condenser
- Loose or poor connection for each connector and harness
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between condenser harness connector and ground.
Condenser
Ground
Continuity
Connector
Terminal
F21
2
Ground
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 6 .
NO
Repair open circuit or short to power in harness or connectors.
- CHECK CONDENSER
Refer to Component Inspection (Condenser)
Is the inspection result normal?
YES
GO TO 7 .
NO
Replace condenser.
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-IV
- Reconnect all harness connectors disconnected.
- Disconnect ignition coil harness connector.
- Turn ignition switch ON.
- Check the voltage between ignition coil harness connector and ground.
Ignition coil
Ground
Voltage
Cylinder
Connector
Terminal
1
F47
3
Ground
Battery voltage
2
F6
3
3
F48
3
4
F7
3
5
F49
3
6
F8
3
7
F51
3
8
F52
3
Is the inspection result normal?
YES
GO TO 9 .
NO
GO TO 8 .
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connector F10 and E22
- Harness for open or short between ignition coil and harness connector F10
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
F47
2
Ground
Existed
2
F6
2
3
F48
2
4
F7
2
5
F49
2
6
F8
2
7
F51
2
8
F52
2
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 10 .
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
F47
1
F49
95
Existed
2
F6
1
91
3
F48
1
92
4
F7
1
104
5
F49
1
102
6
F8
1
94
7
F51
1
105
8
F52
1
101
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 11 .
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK IGNITION COIL WITH POWER TRANSISTOR
Refer to Component Inspection (Ignition Coil with Power Transistor) .
Is the inspection result normal?
YES
GO TO 12 .
NO
Replace malfunctioning ignition coil with power transistor.
- CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .
INSPECTION END