Precautions
Precautions on Engine Control Diagnosis
Service operation of any type performed on engine control system involves a risk of fire and personal injury if proper precaution are not taken.
To prevent any unexpected engine starting, perform the following before proceeding with any CRANKING tests.
• When performing tests not related to fuel injector operation:
— Disconnect all fuel injector wire connectors.
• When performing tests related to fuel injector operation:
— Relieve the fuel pressure in the fuel lines.
Refer to “Fuel Pressure Relief Procedure” in Section 1G (Page 1G-16).
— Disconnect the high pressure fuel pump wire connector located on the fuel vapor separator.
If you do not disconnect the battery before disconnecting or connecting the wiring harness, you could get an electrical shock.
Always turn the main switch “OFF” and disconnect the battery cables when wires are being disconnected or connected.
Failure to take proper precaution when disconnecting the harness connector can cause damage to the wiring harness.
Hold and pull the connectors when disconnecting.
Do not pull the wires.
• To troubleshoot the ECM, BCM and the engine control system, consisting of sensors and actuators, use the Suzuki Diagnostic System.
• When ECM or BCM has been replaced, it is necessary to perform the initialization and re-calibration of SPC system.
• The self-diagnostic codes memory in the ECM will remain even if the battery is disconnected.
• Each electrical circuit is affected by battery voltage, always use a full-charged battery.
• Make sure all ground points have good electrical contact.
• Make sure all wires/cables are securely connected.
