Diagnosis Procedure
- CHECK FUSE-I
- Turn ignition switch OFF.
- Check that the following fuse is not blowing.
Location
Fuse No.
Capacity
IPDM E/R
#45
10A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
GO TO 2.
- CHECK IGNITION COIL POWER SUPPLY-I
- Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.
- Check the voltage between ECM harness connector terminals as per the following.
ECM
Voltage
Connector
+
-
Terminal
E32
185
204
Battery voltage
Is the inspection result normal?
YES
GO TO 3.
NO
Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .
- CHECK IGNITION COIL POWER SUPPLY-II
- Turn ignition switch OFF.
- Disconnect condenser harness connector.
- Turn ignition switch ON.
- Check the voltage between condenser harness connector and ground.
+
-
Voltage
Condenser
Connector
Terminal
F21
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5.
NO
GO TO 4.
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-I
- 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
F19
55
F21
1
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
Proceed to Intermittent Incident .
NO
Repair or replace error-detected parts.
- CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between condenser harness connector and ground.
Condenser
--
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 or replace error-detected parts.
- CHECK CONDENSER
Refer to Component Inspection (Condenser)
Is the inspection result normal?
YES
GO TO 7.
NO
Replace condenser.
- CHECK IGNITION COIL POWER SUPPLY-III
- Reconnect all harness connectors disconnected.
- Disconnect ignition coil harness connector.
- Turn ignition switch ON.
- Check the voltage between ignition coil harness connector and ground.
+
-
Voltage
Ignition coil
Cylinder
Connector
Terminal
1
F47
3
Ground
Battery voltage
2
F8
3
3
F48
3
4
F9
3
5
F49
3
6
F10
3
Is the inspection result normal?
YES
GO TO 9.
NO
GO TO 8.
- CHECK IGNITION COIL POWER SUPPLY CIRCUIT-II
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between IPDM E/R harness connector and ignition coil harness connector.
IPDM E/R
Ignition coil
Continuity
Connector
Terminal
Cylinder
Connector
Terminal
F19
55
1
F47
3
Existed
2
F8
3
3
F48
3
4
F9
3
5
F49
3
6
F10
3
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
Proceed to Intermittent Incident .
NO
Repair or replace error-detected parts.
- CHECK IGNITION COIL GROUND CIRCUIT
- Turn ignition switch OFF.
- Check the continuity between ignition coil harness connector and ground.
Ignition coil
--
Continuity
Cylinder
Connector
Terminal
1
F47
2
Ground
Existed
2
F8
2
3
F48
2
4
F9
2
5
F49
2
6
F10
2
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 10.
NO
Repair or replace error-detected parts.
- CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT
- 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
F79
161
Existed
2
F8
1
164
3
F48
1
153
4
F9
1
162
5
F49
1
168
6
F10
1
154
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
GO TO 11.
NO
Repair or replace error-detected parts.
- 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 IGNITION COIL .