Diagnostic Procedures (2.0L)
- Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical or electrical damage.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- The DTC summaries are generated to support the Jaguar approved diagnostic system, but also provide the basis for diagnosis of OBD related concerns using a suitable generic scan tool, in conjunction with the electrical guides. Until the DTC summaries and electrical guides are available, the engine ignition system can only be accurately diagnosed using the Jaguar approved diagnostic system. For additional information, refer to Dealer technical support.
Engine Ignition - Diagnostic Procedures
- Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical or electrical damage.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the concern is not visually evident, refer to «Symptom Chart»(ref-311886-S05280712372009040700000) .
| DTC | Condition | Possible Source | Action |
|---|---|---|---|
| P0300 P0301 P0302 P0303 P0304 P0305 P0306 | Random misfire detected. Misfire at cylinders 1 to 6 | Poor cylinder compression. Damaged or worn piston rings. Inlet/exhaust valve stuck open/closed. Worn camshaft. Damaged cylinder head gasket. Spark plug fouled/damaged, incorrect gap. | Refer to Engine - Adding A Trailing A or Engine - Adding A Trailing B article. |
| Fuel delivery pressure high/low. Faulty injector inoperative/leaking. Fuel injector continuously open. Fuel contamination. Fuel injector circuit fault. | Refer to Fuel Charging And Controls - Adding A Trailing A or Fuel Charging And Controls - Adding A Trailing B article. | ||
| Damaged ignition coil. Damaged electrical harness/connection. Damaged spark plug. | Refer to Pinpoint Test A . | ||
| P0351 P0353 P0355 | Ignition coils 1A, 2A or 3A primary circuit malfunctions. | Ignition coil open/short circuit. Ignition coil insulation breakdown. Damaged harness. Connector pins bent or corroded. Ignition circuit ground fault. Damaged engine control module (ECM). | Refer to Pinpoint Test A . |
| P0352 P0354 P0356 | Ignition coils 1B, 2B or 3B primary circuit malfunctions. | Ignition coil open/short circuit. Ignition coil insulation breakdown. Damaged harness. Connector pins bent or corroded. Ignition circuit ground fault. Damaged ECM. | Refer to Pinpoint Test A . |
| P1367 | Ignition amplifier group 1 fault. (Cylinders 1, 3, and 5). | Ignition coil open/short circuit. Ignition coil insulation breakdown. Damaged harness. Connector pins bent or corroded. Ignition circuit ground fault. Damaged ECM. | Refer to Pinpoint Test A . |
| P1368 | Ignition amplifier group 2 fault. (Cylinders 2, 4, and 6). | Ignition coil open/short circuit. Ignition coil insulation breakdown. Damaged harness. Connector pins bent or corroded. Ignition circuit ground fault. Damaged ECM. | Refer to Pinpoint Test A . |
Symptom Chart
Scheme 2
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 61 | 1B ignition coil trigger | Green/Blue |
| 62 | 2B ignition coil trigger | Green/white |
| 63 | 3B ignition coil trigger | Green/red |
| 87 | 1A ignition coil trigger | Green/Blue |
| 88 | 2A ignition coil trigger | Green/white |
| 89 | 3A ignition coil trigger | Green/red |
Engine Control Module (ECM) Harness Connector
Scheme 3
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 1 | Ignition coil voltage supply | Red/white |
| 2 | Ignition coil diagnostic signal | Yellow/green |
| 3 | Ignition coil ground supply | Black |
| 4 | Ignition coil trigger | 1A - Green/blue, 2A - Green/white, 3A - Green/red |
1A, 2A, 3A Ignition Coil Harness Connectors
| Pin Number | Circuit Function | Circuit Color |
|---|---|---|
| 1 | Ignition coil voltage supply | Red/white |
| 2 | Ignition coil diagnostic signal | Yellow/green |
| 3 | Ignition coil ground supply | Black |
| 4 | Ignition coil trigger | 1B - Green/blue, 2B - Green/white, 3B - Green/red |
1B, 2B, 3B Ignition Coil Harness Connectors
Scheme 4
| Pin Number | Circuit Function |
|---|---|
| 1 | Ignition coil voltage supply |
| 2 | Ignition coil diagnostic signal |
| 3 | Ignition coil ground supply |
| 4 | Ignition coil trigger |
1A, 2A, 3A, 1B, 2B, 3B Ignition Coils
Pinpoint Test A: Ignition Coils - P0351, P0352, P0353, P0354, P0355, P0356, P1367, P1368
Note. Unless multiple cylinder misfires are apparent, only one circuit will normally need to be tested. The DTC set will indicate which cylinder is misfiring.
Pinpoint Test A
A1
CHECK COIL FUNCTION BY SUBSTITUTION
- Swap suspect coil for known good unit.
- CLEAR the DTC. TEST the system for normal operation.
- Does the same DTC reoccur? The DTC will indicate if the same cylinder is misfiring.
YES Go to step 2 . → A2
NO CLEAR the DTC. TEST the system for normal operation.
A2
CHECK THE IGNITION COIL SUPPLY VOLTAGE CIRCUIT
- Disconnect the relevant A bank ignition coil electrical connector(s).
- Turn the ignition switch to the ON position.
- Measure the voltage between
- Disconnect the relevant B bank ignition coil electrical connector(s).
- Measure the voltage between
Is the voltage greater than 10.5 Volts?
YES Go to step 3 . → A3
NO REPAIR the relevant ignition coil supply voltage circuit. For additional information, refer to appropriate SYSTEM WIRING DIAGRAMS. CLEAR the DTCs. TEST the system for normal operation.
A3
CHECK THE IGNITION COIL GROUND CIRCUIT
- Switch the ignition to the OFF position.
- Disconnect the relevant A bank ignition coil electrical connector(s).
- Measure the resistance between
- Disconnect the relevant B bank ignition coil electrical connector(s).
- Measure the resistance between
Is the resistance less than 5 ohms?
YES Go to step 4 . → A4
NO REPAIR the relevant ignition coil ground circuit. For additional information, refer to appropriate SYSTEM WIRING DIAGRAMS. CLEAR the DTCs. TEST the system for normal operation.
A4
CHECK THE CONTINUITY OF THE IGNITION COIL TRIGGER SUPPLY CIRCUIT
- Disconnect the ECM electrical connector EN016.
- Check the continuity of the ignition coil trigger supply circuit between the relevant ignition coil electrical connector(s) and the ECM electrical connector
Is the resistance less than 5 ohms?
YES Go to step 5 . → A5
NO REPAIR the ignition coil trigger supply circuit between the relevant ignition coil electrical connector(s) and the ECM electrical connector. CLEAR the DTCs. TEST the system for normal operation.
A5
CHECK THE CONTINUITY BETWEEN THE IGNITION COIL AND THE ECM
- Check the continuity of the ignition coil diagnostic signal circuit, between the ignition coil electrical connector(s) and the ECM electrical connector
Is the resistance less than 5 Ohms?
YES INSTALL a new ECM. For additional information refer to «Electronic Engine Controls - Adding A Trailing A»(ref-311888) or «Electronic Engine Controls - Adding A Trailing B»(ref-311889) article. Before replacing a ECM, contact Dealer technical support. CLEAR the DTCs. TEST the system for normal operation.
NO REPAIR the circuit between the ignition coil electrical connector(s) and the ECM electrical connector. CLEAR the DTCs. TEST the system for normal operation.
Scheme 5
- Disconnect the battery ground cable. For additional information, refer to «Battery, Mounting and Cables»(ref-311867) article.
- Remove the air cleaner. For additional information, refer to «Intake Air Distribution And Filtering - Adding A Trailing A»(ref-311885) or «Intake Air Distribution And Filtering - Adding A Trailing B»(ref-311877) article.
- Disconnect the electrical connectors.
- Remove the ignition coils.