Dtc P0685, P0686, P0687, P0689, Or P0690 - Suzuki XL7 2007 Service Manual

Circuit/System Testing
NOTE
Additional DTCs will set when disconnecting
the components.
1. Ignition OFF, disconnect the harness connector of all
appropriate sensors for the applicable DTC. Refer to
Diagnostic Aids.
2. Ignition ON, measure for 4.6-5.2 volts between one
of the 5-volt reference circuits and ground.
➢ If the voltage is less than 4.6 volts, test for a short
to ground on all the 5-volt reference circuits. If all
circuits test normal, replace the control module.
➢ If the voltage is greater than 5.2 volts, test for a
short to voltage on all the 5-volt reference circuits
for each component associated with the
appropriate 5-volt reference circuit. If all circuits test
normal, replace the control module.
NOTE
A short to voltage on the signal circuit of
certain components may cause this DTC to
set.

DTC P0685, P0686, P0687, P0689, or P0690

Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: " prior to using this diagnostic procedure.
• Review "Strategy Based Diagnosis: " for an overview of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: " provides an overview of each diagnostic
category.
DTC Descriptors
DTC P0685: Engine Controls Ignition Relay Control Circuit
DTC P0686: Engine Controls Ignition Relay Control Circuit Low Voltage
DTC P0687: Engine Controls Ignition Relay Control Circuit High Voltage
DTC P0689: Engine Controls Ignition Relay Feedback Circuit Low Voltage
DTC P0690: Engine Controls Ignition Relay Feedback Circuit High Voltage
Diagnostic Fault Information
Circuit
B+ Supply Voltage - Coil
B+ Supply Voltage - Switch
Relay Control Circuit
Ignition Voltage Circuit
Engine General Information and Diagnosis:
3. Connect each component associated with the 5-volt
reference 2 circuit one at a time while monitoring the
5-Volt Reference 2 Circuit Status parameter with a
scan tool. The parameter should continue to display
OK.
➢ If the parameter displays Fault when a component
is connected, test the signal circuit of that
component for a short to voltage. If the circuit tests
normal, replace the component.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Camshaft Position Sensor Replacement - Bank 2
(Left Side) Exhaust: "
• "Camshaft Position Sensor Replacement - Bank 2
(Left Side) Intake: "
• "Camshaft Position Sensor Replacement - Bank 1
(Right Side) Exhaust: "
• "Camshaft Position Sensor Replacement - Bank 1
(Right Side) Intake: "
• "Accelerator Pedal Position Sensor Replacement: "
• "Control Module References: " for engine control
module replacement, setup, and programming
Short to High
Ground Resistance
P0685 P0685
— P0689
P0686 P0685
— P0689
Short to
Open
Voltage
P0685 —
P0689 P0690
P0685 P0687
P0689 P0690
1A-140
Signal
Performance
—
—
P0685
—