Captiva |
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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Ignition Voltage | 1 | 2 | - | - |
Ignition Coil 1 Control Circuit | P0300, P0351 | P0300, P0351 | P0300, P0351 | - |
Ignition Coil 2 Control Circuit | P0300, P0352 | P0300, P0352 | P0300, P0352 | - |
Ignition Coil 3 Control Circuit | P0300, P0353 | P0300, P0353 | P0300, P0353 | - |
Ignition Coil 4 Control Circuit | P0300, P0354 | P0300, P0354 | P0300, P0354 | - |
Ignition Coil 5 Control Circuit | P0300, P0355 | P0300, P0355 | P0300, P0355 | - |
Ignition Coil 6 Control Circuit | P0300, P0356 | P0300, P0356 | P0300, P0356 | - |
Low Reference | - | P0351, P0352, P0353, P0354, P0355, P0356 | - | - |
1. The Engine Cranks But Does Not Run and opens the fuse that supplies voltage to the ignition coils. 2. The Engine Cranks But Does Not Run |
The ignition system on this engine uses an individual coil/module for each cylinder. The engine control module (ECM) controls the spark event for each cylinder through the eight individual ignition control circuits. When the ECM commands the ignition control circuit ON, electrical current will flow through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM will command the ignition control circuit OFF, interrupting current flow through the primary winding. The magnetic field created by the primary winding will collapse across the secondary coil windings, producing a high voltage across the spark plug electrodes. The ECM uses information from the crankshaft position sensor, and the camshaft position sensor for sequencing and timing of the spark events.
• | The engine is running. |
• | The ignition voltage is greater than 6 V. |
• | DTC P0351-P0356 runs continuously when the above conditions are met. |
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
DTCs P0351-P0356 are Type B DTCs.
DTCs P0351-P0356 are Type B DTCs.
A high resistance condition on any ignition control circuit can cause an engine misfire without setting DTC P0351-P0356.
Electronic Ignition System Description
Control Module References for scan tool information
• | Ignition Coil 1-6 Control Circuit Low Voltage Test Status |
• | Ignition Coil 1-6 Control Circuit Open Test Status |
• | Ignition Coil 1-6 Control Circuit High Voltage Test Status |
Each parameter should display Not Run or OK. |
⇒ | If greater than the specified range, repair the ground circuit for an open/high resistance. |
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM. |
⇒ | If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary. |
⇒ | If test status is Malfunction test for open or short to ground. |
⇒ | If test status is Malfunction test for open circuit. |
⇒ | If test status is Malfunction test for short to voltage. |
• | Control Module References for ECM replacement, setup, and programming |
Note: An ignition control circuit fault condition will result in an engine misfire, and under certain driving conditions could possibly overheat the 3-way catalytic converter.
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