Suzuki XL7 2007 Service Manual page 246

1A-141 Engine General Information and Diagnosis:
Circuit/System Description
The engine controls (EC) ignition relay, or powertrain
relay is a normally open relay. The relay switch is held in
the open position by spring tension. Battery positive
voltage is supplied directly to the relay coil and the
switch contact at all times. The engine control module
(ECM) supplies the ground path to the relay coil control
circuit via an internal integrated circuit called an output
driver. When the ECM commands the relay ON, ignition
voltage is supplied to the following fuses in the
underhood fuse block:
• ETC/ECM Fuse
• EMM DEV 1 Fuse
• EMM DEV 2 Fuse
• EVEN COIL/INJ Fuse
• ODD COIL/INJ Fuse
The ignition voltage that is supplied to the ECM through
the ECM fuse, provides power to the internal ECM
circuits associated with the throttle actuator control
(TAC) operation.
Conditions for Running the DTC
P0685, P0686, and P0687
• The ignition voltage is between 10-18 volts.
• The engine speed is greater than 80 RPM.
• The powertrain relay has been commanded ON and
OFF.
• The DTCs run continuously once the above condition
is met.
P0689 and P0690
• The ignition voltage is between 10-18 volts.
• The ignition is ON.
• The DTCs runs continuously once the above condition
is met.
Conditions for Setting the DTC
P0685, P0686, and P0687
The commanded state of the ODM and the actual state
of the control circuit do not match for greater than a
cumulative of 50 seconds.
P0689 and P0690
The ECM detects that powertrain relay feedback voltage
is less than predicted range for greater than 1 second,
when the powertrain relay is commanded ON or OFF.
The condition exists for a cumulative of 50 seconds.
Action Taken When the DTC Sets
DTCs P0685, P0686, P0687, P0689, and P0690 are
Type C DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0685, P0686, P0687, P0689, and P0690 are
Type C DTCs.
Diagnostic Aids
• This test procedure requires that the vehicle battery
has passed a load test and is completely charged.
Refer to "Battery Inspection/Test: ".
• An open in the relay control circuit will cause no
communication with the ECM when the ignition switch
is cycled OFF and ON after the initial failure. The
malfunction indicator lamp (MIL) will flash rapidly and
other relays can be heard turning on and off with the
ignition ON.
• When disconnecting electrical connectors or removing
fuses and relays from a fuse block, always inspect the
component electrical terminals for corrosion and the
mating electrical terminals for tightness.
• Use the J 35616 Connector Test Adapter Kit for any
test that requires probing the underhood fuse block
terminals, component wire harness terminals, or the
ECM wire harness connector terminals.
Reference Information
Schematic Reference
"Engine Controls Schematics"
Connector End View Reference
• "Engine Control Module Connector End Views"
• "Engine Controls Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
DTC Type Reference
"Powertrain Diagnostic Trouble Code (DTC) Type
Definitions"
Scan Tool Reference
• "Scan Tool Data List - Engine Controls - 3.6L (LY7)"
• "Scan Tool Data Definitions - Engine Controls - 3.6L
(LY7)"
• "Scan Tool Output Controls - Engine Controls - 3.6L
(LY7)"
Circuit/System Verification
1. Ignition ON, you should be able to communicate with
the ECM using a scan tool.
2. Ignition ON, view the DTC information with a scan
tool. DTCs P0685, P0686, P0687, P0689, or P0690
should not be set.