Dtc B1288 - Suzuki XL7 2007 Service Manual

9O-37 Cellular / Entertainment / Navigation / Audio:

DTC B1288

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 B1288 01: Video Display Mode Control Signal Short to Battery
DTC B1288 02: Video Display Mode Control Signal Short to Ground
DTC B1288 04: Video Display Mode Control Signal Open
Diagnostic Fault Information
Circuit
Video Display Mode Control Signal
Display mode will not change from Normal mode.
1
Circuit/System Description
The radio can control the video display mode on vehicles
equipped with rear seat entertainment (RSE) Video. The
radio varies a pulse with modulated (PWM) signal to the
rear entertainment video screen to command the display
mode.
Conditions for Running the DTC
The following are conditions that must be present in
order for the radio to enable the diagnostics.
• The radio is in ACCESSORY, RUN, or RAP power
mode.
• The system voltage is at least 9 volts and no more
than 16 volts.
Conditions for Setting the DTC
Circuit failure 400 ms after radio activates Remote
Enable.
Action Taken When the DTC Sets
Radio sets the DTC and defaults the video display to
Normal mode.
Conditions for Clearing the DTC
• The condition must be corrected.
• A history DTC clears after 100 malfunction-free
ignition cycles.
• The radio receives the clear code command from the
scan tool.
Short to Open/High
Ground Resistance
B1288 02 B1288 04
1
Reference Information
Schematic Reference
"Radio/Navigation System Schematics"
Connector End View Reference
"Entertainment/Communication Connector End Views"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
Circuit/System Verification
Verify the video will change display.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector of
the rear video display. Ignition ON, with a DMM verify
there is 100 to 300 Hz on the video display mode
control signal circuit.
➢ If 100 to 300 Hz is not present on the video display
mode signal circuit test for an open, a short to
voltage, or a short to ground. If the video display
mode signal circuit tests normal, replace the radio.
2. If 100 to 300 Hz is present and the video display
mode signal circuit tests normal, replace the rear
video display.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
"Control Module References: " for radio replacement,
setup, and programming
Short to Voltage
B1288 01
1 1
Signal
Performance
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