Terminals and Reference Value for Display Unit Nissan Quest III

Terminals and Reference Value for Display Unit

DISPLAY UNIT TERMINALS AND REFERENCE VALUE Terminal No. (Wire color) Item Signal input/output Condition Voltage (Approx.) Example of symptom + - Ignition switch Operation 1 (B) Ground Ground - ON - 0V - 2 (L/W) Ground Power supply (Inverter) Input ON - 9V Screen is not shown. 3 (L/R) Ground Power supply (Signal) Input ON - 9V Screen is not shown. 6 (R/W) 7 RGB signal (G: green) Input ON Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function. Screen looks reddish. 7 - Shield ground - - - - - 8 (R) 21 Horizontal synchronizing (HP) signal Output ON - Operating screen for audio and A/C is not displayed when showing NAVI screen. 9 (B) 21 RGB area (YS) signal Input ON Press the "TRIP" button. Operating screen for audio and A/C is not displayed when showing NAVI screen. 11 (B/W) 23 Display communication signal (DCU-DSP) Input ON - Though a screen is displayed, it is impossible to adjust brightness. 13 (P/B) Ground (Inverter) Ground - ON - 0V - 14 (P/L) Ground (Signal) Ground - ON - 0V - 17 (R/L) 7 RGB signal (R: red) Input ON Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function. Screen looks bluish. 18 (B) 7 RGB signal (B: blue) Input ON Select "Display Diagnosis (DCU)" of CONFIRMATION/ADJUSTMENT function. Screen looks yellowish. 19 (G) 21 RGB synchronizing signal Input ON Press the "TRIP" button. NAVI screen is rolling. 20 (W) 21 Vertical synchronizing (VP) signal Output ON - Operating screen for audio and A/C is not displayed when showing NAVI screen. 21 - Shield ground - - - - - 22 (L) 23 Display communication signal (DSP-DCU) Output ON - Though a screen is displayed, it is impossible to adjust brightness. 23 - Shield ground

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AV SWITCH TERMINALS AND REFERENCE VALUE Terminal No. (Wire color) Item Signal input/output Condition Voltage (Approx.) Example of symptom + - Ignition switch Operation 1 (Y/R) Ground Battery power Input OFF - Battery voltage System does not work properly. 2 (V) Ground ACC signal Input ACC - Battery voltage System does not work properly. 3 (R/L) Ground Illumination signal Input OFF Lighting switch is ON (position 1). Battery voltage AV switch illumination does not come on when lighting switch is ON (position 1). Turn lighting switch OFF. 3.0V or less 4 (R/Y) Ground Illumination control signal Input ON Illumination control switch is operated by lighting switch in 1st position. Changes between 0 and 12V AV switch illumination cannot be controlled. 5 (B) Ground Ground - ON - 0V - 6 (V) Ground Communication signal (+) Input/output ON - System does not work properly. 7 - Shield ground - - - - 8 (LG) Ground Communication signal (-) Input/output ON - System does not work properly. 12 (R) Ground Remote control A Input ON Press MODE switch 0V Steering wheel audio controls do not function. Press SEEK UP switch 0.75V Press VOL UP switch 2V Except for above 5V 13 (G) Ground Remote control B Input ON Press POWER switch 0V Steering wheel audio controls do not function. Press SEEK DOWN switch 0.75V Press VOL DOWN switch 2V Except for above 5V 14 (B/Y) - Remote control ground - - - - Steering wheel audio controls do not function

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BCM TERMINALS AND REFERENCE VALUE Terminal No. Wire color Signal name Measuring condition Reference value (Approx.) Ignition switch Operation or condition 2 GR/R Combination switch input 5 ON Lighting, turn, wiper OFF Wiper dial position 4 3 G/Y Combination switch input 4 ON Lighting, turn, wiper OFF Wiper dial position 4 4 G/R Combination switch input 3 ON Lighting, turn, wiper OFF Wiper dial position 4 5 G/B Combination switch input 2 ON Lighting, turn, wiper OFF Wiper dial position 4 6 G/W Combination switch input 1 11 V Ignition switch (ACC) ACC - Battery voltage 32 R/G Combination switch output 5 ON Lighting, turn, wiper OFF Wiper dial position 4 33 R/Y Combination switch output 4 ON Lighting, turn, wiper OFF Wiper dial position 4 34 R Combination switch output 3 ON Lighting, turn, wiper OFF Wiper dial position 4 35 R/B Combination switch output 2 ON Lighting, turn, wiper OFF Wiper dial position 4 36 R/W Combination switch output 1 38 G Ignition switch (ON) ON - Battery voltage 39 L CAN-H - - - 40 P CAN-L - - - 42 Y/G Battery power supply OFF - Battery voltage 52 B/W Ground ON - 0V 55 W/B Battery power supply (fusible link) OFF - Battery voltage

1. Select a malfunctioning diagnosis No. in the diagnosis result quick reference table.
2. Find estimated malfunctioning system in the diagnosis No. table and perform check by referring to , " «WIRING DIAGRAM - COMM»(ref-239967-S08416901262006080400000) ".
3. Turn the ignition switch OFF and perform self-diagnosis again. QUICK REFERENCE CHART Screen switch Diagnosis No. Switch color DCU (1) DISPLAY Audio unit Navigation GPS antenna Red x 1 Gray x x 2 x x 3 x x x 4 (1) DCU = Display control unit CAUTION: When AV switch has a malfunction, you cannot start. Refer to , " «UNABLE TO OPERATE ALL OF AV SWITCHES (UNABLE TO START SELF-DIAGNOSIS)»(ref-239967-S34832194302006080400000) ". When display unit has a malfunction, you cannot start. Refer to , " «SCREEN IS NOT SHOWN»(ref-239967-S01788422742006080400000) ".

SELF-DIAGNOSIS CODES

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1. Start the engine.
2. Turn the audio system off.
3. While pressing the "4" button, turn the volume control dial clockwise or counterclockwise for 30 clicks or more. (When the self-diagnosis mode is started, a short beep will be heard.)
4. The initial trouble diagnosis screen will be shown, and items "Self-Diagnosis (DCU)", "Self-Diagnosis (NAVI)", "Confirmation/Adjustment" and "CAN DIAG SUPPORT MONITOR" will become selective.
5. Perform self-diagnosis by selecting the "Self-diagnosis (NAVI)". Self-diagnosis subdivision screen will be shown and the operation enters the self-diagnosis mode. A bar graph shown below the self-diagnosis subdivision screen indicates progress of the diagnosis.
6. On the "SELF DIAGNOSIS" screen, each unit name will be colored according to the diagnosis result, as follows. Green: Not malfunctioning. Yellow: Cannot be judged by self-diagnosis results. Red: Unit is malfunctioning. Gray: Diagnosis has not been done. If several malfunctions are present in a unit, color of its switch on the screen will be either red, yellow, or gray, determined by the malfunction of the highest priority.
7. Select a switch on the "SELF DIAGNOSIS" screen and comments for the diagnosis results will be shown. When the switch is green, the following comment will be shown. "Self-diagnosis was successful. Further diagnosis and adjustments are recommended. Follow the "Confirmation and Adjustments" menu or refer to the service information." When the switch is yellow, the following comment will be shown. "Connection to the following unit is abnormal. See the service information for further details". When the switch is red, the following comment will be shown. "Center Control Unit is abnormal". When the switch is gray, the following comment will be shown. "Self-diagnosis for DVD-ROM DRIVER of NAVI was not conducted because no DVD-ROM was available."

1. Select a malfunctioning diagnosis No. in the diagnosis result quick reference table.
2. Find estimated malfunctioning system in the diagnosis No. table and perform check by referring to , " «WIRING DIAGRAM - COMM»(ref-239967-S08416901262006080400000) ".
3. Turn the ignition switch OFF and perform self-diagnosis again. QUICK REFERENCE CHART Screen switch Diagnosis No. Switch color Center control unit (1) GPS antenna Red x 1 Gray x 2 Yellow x 3 x 4 x x 5 (1) Center Control unit = NAVI control unit CAUTION: When AV switch has a malfunction, you cannot start. Refer to , " «UNABLE TO OPERATE ALL OF AV SWITCHES (UNABLE TO START SELF-DIAGNOSIS)»(ref-239967-S34832194302006080400000) ". When display unit has a malfunction, you cannot start. Refer to , " «SCREEN IS NOT SHOWN»(ref-239967-S01788422742006080400000) ".