1F-296 ENGINE CONTROLS
SSANGYONG Y158
Circuit Description
The Engine Control Module (ECM) has six individual in-
jector driver circuits, each of which controls an injector.
When a driver circuit is grounded by the ECM, the injec-
tor is activated. The ECM monitors a voltage drop through
a fixed resistor and controls it. The voltage on each driver
is monitored to detect a fault. If the voltage is not what
the ECM expects to monitor on the circuit, a Diagnostic
Trouble Code (DTC) is set. This DTC detects a short to
battery conditions for low-side drive injector outputs.
Conditions for Setting the DTC
•••••
Current is between 2.2 ampares and 4.3 ampares.
(depending on driver condition)
Action Taken When the DTC Sets
•••••
The MIL will illuminate after two consecutive driving
cycles in which the diagnostic runs with the fault ac-
tive.
•••••
The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.
•••••
A history DTC is stored.
Conditions for Clearing the MIL/DTC
•••••
The MIL will turn off after three consecutive driving
cycles in which the diagnostic runs without a fault.
DIAGNOSTIC TROUBLE CODE (DTC) P0277
INJECTOR 6: SHORT CIRCUIT TO BATTERY (3.2L DOHC)
•••••
A history DTC will clear after 40 consecutive warm-
up cycles without a fault.
•••••
The DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
An injector driver circuit that is shorted to voltage will
cause a DTC P0277 to set. It will also cause a misfire
due to an inoperative injector. A misfire DTC should also
be set indicating which injector is inoperative.
The injector resistance tested at the ECM connection
is slightly more than if tested directly at the injector be-
cause it includes resistance of the harness wires. The
normal value is about 14.5 - 15
Ω
.
Test Description
The number(s) below refer to specific step(s) on the
diagnostic table.
1. Euro On-Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure
records data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.
YAB1F170