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.CONNECTOR TERMINAL VOLTAGE CHART
ECM Voltage Connector + - Terminal Terminal M9 125 128 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.CONNECTOR TERMINAL VOLTAGE CHART
Condenser Ground Voltage Connector Terminal F38 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.CONNECTOR TERMINAL CONTINUITY CHART
IPDM E/R Condenser Continuity Connector Terminal Connector Terminal E7 17 F38 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 connectors F3, E12
- Harness for open or short between IPDM E/R and condenser
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.CONNECTOR TERMINAL CONTINUITY CHART
Condenser Ground Continuity Connector Terminal F38 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-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.CONNECTOR TERMINAL VOLTAGE CHART
Ignition coil Ground Voltage Cylinder Connector Terminal 1 F59 3 Ground Battery voltage 2 F63 3 3 F60 3 4 F64 3 5 F61 3 6 F65 3 Courtesy of NISSAN MOTOR CO., U.S.A.
Is the inspection result normal?
YES: GO TO 8.
NO: Repair or replace harness connectors.
- CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Check the continuity between ignition coil harness connector and ground.CONNECTOR TERMINAL CONTINUITY CHART
Ignition coil Ground Continuity Cylinder Connector Terminal 1 F59 2 Ground Existed 2 F63 2 3 F60 2 4 F64 2 5 F61 2 6 F65 2 - Also check harness for short to power.
Is the inspection result normal?
YES: GO TO 9.
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.CONNECTOR TERMINAL CONTINUITY CHART
Ignition coil ECM Continuity Cylinder Connector Terminal Connector Terminal 1 F59 1 F105 20 Existed 2 F63 1 16 3 F60 1 12 4 F64 1 11 5 F61 1 15 6 F65 1 19 - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES: GO TO 10.
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 11.
NO: Replace malfunctioning ignition coil with power transistor.
- CHECK INTERMITTENT INCIDENT
Refer to "DESCRIPTION ".
INSPECTION END