Chevrolet Trax: Radio information display malfunction (monochrome display)
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.
Diagnostic Fault Information
Circuit/System Description
The radio controls and information display are separate components from the
radio. Each component is supplied
battery voltage and ground. The radio uses the wake up circuit to control the
power state of the display. The
radio controls communicate with the info display module through the LIN serial
data circuit. Display
backlighting dimming level, graphical data, and radio control inputs are
communicated over the data circuits
between the display and the radio.
Reference Information
Schematic Reference
Radio/Navigation System Schematics (Encore), Radio/Navigation System
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
Description and Operation
Radio/Audio System Description and Operation (with Monochrome Display),
Radio/Audio System
Description and Operation (with Color Display)
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the P17 Info Display
Module.
- Test for less than 10 ohms between the ground circuit terminal 2 and
ground.
If 10 ohms or greater
- Ignition OFF.
- Test for less than 2 ohms in the ground circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, repair the open/high resistance in the ground
connection.
less than 10 ohms.
- Test for less than 20 ohms between the data shield circuit terminal 6
and ground.
If 20 ohms or greater.
- Ignition OFF, disconnect the X1 connector at the A11 Radio.
- Test for less than 2 ohms in the data shield circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the A11 Radio.
If less than 20 ohms.
- Verify that a test lamp illuminates between the B+ circuit terminal 1
and ground.
- If the test lamp does not illuminate and the circuit fuse is good.
- Ignition OFF.
- Test for less than 2 ohms in the B+ circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, refer to Power Mode Mismatch .
If the test lamp does not illuminate and the circuit fuse is open.
- Ignition OFF.
- Test for infinite resistance between the B+ circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance, replace the P17 Info Display Module.
If the test lamp illuminates
- Ignition ON.
- Test for 2-3 V between the data circuit terminals listed below and
ground.
- terminal 7
- terminal 8
- If less than 2 V
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
- Test for infinite resistance between the data circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the data circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the A11 Radio.
- If greater than 3 V
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
Ignition ON.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the A11 Radio.
- If 2-3 V
- Test for less than 1 V between the control circuit terminals listed
below and ground.
- terminal 4
- terminal 5
- If greater than 1 V
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
Ignition ON.
- Test for less than 1 V between the control circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the A11 Radio
- If less than 1 V
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
- Test for infinite resistance between the control circuit terminals
listed below and ground.
- P17 Info Display Module terminal 4
- P17 Info Display Module terminal 5
- If less than infinite resistance,
Repair the short to ground on the circuit.
If infinite resistance
- Test for less than 2 ohms between the control circuits listed below.
- P17 Info Display Module terminal 4 and the A11 Radio terminal 13 X1
- P17 Info Display Module terminal 5 and the A11 Radio terminal 27 X1
- If 2 ohms or greater
Repair the open/high resistance in the circuit.
If less than 2 ohms.
- Replace the P17 Information Display Module. Connect all harness
connectors.
- Ignition ON, radio ON.
- Verify the P17 Info Display Module turns on and information is shown on
the display.
If the information display still malfunctions.
Replace the A11 Radio.
- If the info display module turns on and information is shown on the
display.
- All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Driver Information Display Replacement (UAG) , Driver Information
Display Replacement (UDN)
- Control Module References for radio 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
WARNING: Refer to Brake Dust Warning .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle
.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation .
Fig. 38: Upper And Lower Brake Caliper Guide Pin Bolts
NOTE:
DO NOT us
HVAC Control Module Replacement
When replacing or disconnecting the HVAC control module, it will be necessary
to perform a recalibration
process. When installing or reconnecting the HVAC control module, be sure to
perform the following:
Preferred Method (with Scan Tool)
NOTE: Do not adjust any con