Chevrolet Trax: DTC P0685, P0686, P0687, P0689, P0690, OR P1682 (LUV)
Diagnostic Instructions
- 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.
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
DTCP0689
Engine Controls Ignition Relay Feedback Circuit Low Voltage
DTC P0690
Engine Controls Ignition Relay Feedback Circuit High Voltage
DTC P1682
Ignition 1 Switch Circuit 2
Diagnostic Fault Information
Engine Controls Ignition Relay
Typical Scan Tool Data
Engine Controls Ignition Relay Control Circuit Low Voltage, Open, and High
Voltage Test Status- Component Commanded OFF
Engine Controls Ignition Relay Control Circuit Low Voltage, Open, and High
Voltage Test Status- Component Commanded ON
Circuit/System Description
There are 2 ignition voltage circuits supplied to the engine control module (ECM).
One is supplied by the
engine controls ignition relay, and the other is supplied by the ignition main
relay. The ECM monitors and
compares the ignition voltage supplied by the 2 relays.
Conditions for Running the DTC
P0685, P0686, P0687
The DTC runs when Ignition 1 signal voltage is greater than 11 V.
P0689
- DTC P0685, P0686, or P0687 is not set.
- The engine controls ignition relay is commanded ON.
- Ignition 1 signal voltage is greater than 11 V.
- The DTC runs continuously when the above conditions are met.
P0690
- DTC P0685, P0686, or P0687 is not set.
- The engine controls ignition relay is commanded OFF.
- The DTC runs continuously when the above conditions are met.
P1682
- The engine controls ignition relay is commanded ON.
- Ignition voltage is greater than 5.5 V.
- The DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0685
The ECM detects that the commanded state of the driver and the actual state
of the control circuit do not match
for greater than 2 s.
P0686
The ECM detects a short to ground on the control circuit for greater than 2
s.
P0687
The ECM detects a short to voltage on the control circuit for greater than 2
s
P0689
The ECM detects the engine controls ignition relay feedback circuit is less
than 5 V.
P0690
The ECM detects the engine controls ignition relay feedback circuit is
greater than 4 V for greater than 5 s.
P1682
The ECM detects that the voltage level difference is greater than 3 V between
the 2 ignition voltage circuits for
greater than 1 s.
Action Taken When the DTC Sets
- DTCs P0685, P0686, P0687, and P0690 are Type B DTCs.
- DTC P0689 is a Type C DTC.
- DTC P1682 is a Type A DTC.
Conditions for Clearing the DTC
- DTCs P0685, P0686, P0687, and P0690 are Type B DTCs.
- DTC P0689 is a Type C DTC.
- DTC P1682 is a Type A DTC.
Diagnostic Aids
The engine controls ignition relay may also be labeled the powertrain relay,
the engine control module relay, or
the main relay. The ignition main relay may also be labeled the run/crank relay,
the ignition run relay, the
ignition 1 relay, or the ignition relay.
Reference Information
Schematic Reference
- Engine Controls Schematics (Encore) , Engine Controls Schematics (Trax)
- Power Distribution Schematics (Encore) , Power Distribution
Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Component View Reference
Powertrain Component Views
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Electrical Center Identification Views (Encore) , Electrical
Center Identification Views (Trax)
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (LUV)
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
NOTE:
- Ignition ON, observe the scan tool DTC information. Verify DTC P0685,
P0686, P0687, P0689, P0690,
or P1682 is not set.
- If any of the DTCs are set
Refer to Circuit/System Testing.
- If none of the DTCs are set
- Operate the vehicle within the Conditions for Running the DTC. You may
also operate the vehicle within
the conditions that you observed from the Freeze Frame/Failure Records data.
- If any of the DTCs are set
Refer to Circuit/System Testing.
- If none of the DTCs are set
- All OK.
Circuit/System Testing
NOTE: You must perform the Circuit/System Verification before
proceeding with
Circuit/System Testing unless sent here from Engine Cranks But Does Not Run.
- Ignition OFF, disconnect the KR75 Engine Controls Ignition Relay.
- Verify a test lamp illuminates between ground and the relay circuit
terminals listed below:
- Terminal 86
- Terminal 30
- If the test lamp does not illuminate
Replace the front compartment fuse block.
If the test lamp illuminates
NOTE:
- High resistance in the circuit/underhood fuse block for either
the KR75 Engine Controls Ignition Relay or the KR73 Ignition
Run Relay can cause DTC P1682 to set.
- A short to voltage on any of the circuits supplied by the engine
controls ignition relay can cause DTC P0690 to set.
- Ignition ON.
- Verify that a test lamp does not illuminate between the ignition voltage
circuit terminal 87 and ground.
- If the test lamp illuminates
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module.
- Ignition ON.
- Test for less than 1 V between ground and connector terminal 28.
- If 1 V or greater, repair the short to voltage in the circuit.
- If less than 1 V, replace the K20 Engine Control Module.
- If the test lamp does not illuminate
- Ignition OFF, connect a 20 A fused jumper wire between the relay switch
B+ circuit terminal 30 and the
relay switch ignition voltage circuit terminal 87.
- Ignition ON.
- Verify the scan tool Engine Controls Ignition Relay Feedback Signal
parameter displays B+.
- Ignition OFF, disconnect the X2 harness connector at the K20 Engine
Control Module.
- Test for less than 2 ohms in the relay switch ignition voltage circuit
end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms
- Test for infinite resistance between the relay switch ignition voltage
circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the K20 Engine Control Module.
- If B+ is displayed
- Ignition OFF, connect a DMM, set to the diode setting, between control
circuit terminal 85 and ground.
- Verify the DMM displays OL.
- Disconnect the X1 harness connector at the K20 Engine Control Module.
- Test for infinite resistance between ground and the relay control
circuit.
- If less than infinite resistance, repair the short to ground in the
circuit.
- If infinite resistance, replace the K20 Engine Control Module.
- If OL is displayed
- Ignition ON.
- Verify the DMM displays less than 1 V.
- Ignition OFF, disconnect the X1 connector at the K20 Engine Control
Module.
- Ignition ON.
- Test for less than 1 V on the relay control circuit.
- If 1 V or greater, repair the short to voltage on
- If less than 1 V
- Test for less than 2 ohms in the control circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- if less than 2 ohms, replace the K20 Engine Control Module.
- If less than 1 V
- Test or replace the KR75 Engine Controls Ignition Relay.
Component Testing
Relay Test
- Ignition OFF, disconnect the KR75 Engine Controls Ignition Relay.
- Test for 70-110 ohms between terminals 85 and 86:
- If less than 70 ohms or greater than 110 ohms
Replace the relay.
- Test for infinite resistance between the terminals listed below:
- 30 and 86
- 30 and 87
- 30 and 85
- 85 and 87
- If less than infinite resistance
Replace the relay.
- Install a 20 A fused jumper wire between relay terminal 85 and 12 V.
Install a jumper wire between relay
terminal 86 and ground.
- Test for less than 2 ohms between terminals 30 and 87.
Replace the relay.
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Front Compartment Fuse Block Replacement
- Relay Replacement (Within an Electrical Center) , Relay Replacement (Attached
to Wire Harness)
- Control Module References for Engine Control Module replacement,
programming, and setup.
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle Prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
Removal Procedure
Remove the battery tray. Refer to Battery Tray Replacement .
Fig. 15: Clutch Actuator Cylinder Front Pipe
Unclip the clutch actuator cylinder front pipe from the 2 retainers (1).
Fig. 16: BPMV Bracket Assembly
Remove the clutch actuator cylinder pipe retainer (1).
Remo
Calibration Criteria
NOTE:
Do not apply the brake pedal during the brake pedal position sensor
calibration
procedure. Any movement of the brake pedal during this procedure will cause
the calibration procedure to fail. If this occurs, the brake pedal position
sensor
calibration must be repeated.
Br