Safety Indicator System Acura MDX I

Scheme 55

Scheme 56

Scheme 57

Scheme 58

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Scheme 60

Scheme 61

Scheme 62

Scheme 63

1. Remove the gauge assembly (see «GAUGE ASSEMBLY REPLACEMENT»(/acura/mdx/i-2000-2006/remont/gauges-instrument-panels/#gauges) ).
2. Disconnect connector A (30P) and connector C (14P or 16P*) from the gauge assembly. *: '04-'06 models
3. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 4.
4. With the connectors still disconnected, make these input tests at the connectors. If the test indicates a problem, find and correct the cause, then recheck the system. If the input test proves OK, go to step 5. SAFETY INDICATOR INPUT TEST (CONNECTORS DISCONNECTED) Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained A1 WHT/GRN Under all conditions Check for continuity between the A1 terminal and the brake light failure sensor No. 4 (or No. 2 (1) ) terminal: There should be continuity. An open in the wire (1) '04-'06 models
5. Reconnect the connectors to the gauge assembly, turn the ignition switch ON (II) to keep the system awake and perform the following input tests at the appropriate connector. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the gauge internal circuit must be faulty. SAFETY INDICATOR INPUT TEST (CONNECTORS CONNECTED) Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained C9 (1) BLK Under all conditions Check for voltage to ground: There should be less than 1 V. Poor ground (G501) An open in the wire C (1) C10 (2) YEL Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. Blown No. 9 (10 A) fuse in the driver's under-dash fuse/relay box An open in the wire C4 (1) C5 (2) GRN Front passenger's door open Check for voltage to ground: There should be less than 1 V. Faulty front passenger's door switch An open in the wire Front passenger's door closed Check for voltage to ground: There should be 5 V or more. Faulty front passenger's door switch Short to ground in the wire C5 (1) C6 (2) GRN/ORN Driver's door open Check for voltage to ground: There should be less than 1 V. Faulty driver's door switch An open in the wire Driver's door closed Check for voltage to ground: There should be 5 V or more. Faulty driver's door switch Short to ground in the wire C11 (1) C14 (2) ORN Tailgate open Check for voltage to ground: There should be less than 1 V. Faulty tailgate latch switch An open in the wire Poor ground (G602) Tailgate closed Check for voltage to ground: There should be 5 V or more. Faulty tailgate latch switch Short to ground in the wire C12 (1) C15 (2) GRN/WHT Right rear door open Check for voltage to ground: There should be less than 1 V. Faulty right rear door switch An open in the wire Right rear door closed Check for voltage to ground: There should be 5 V or more. Faulty right rear door switch Short to ground in the wire C13 (1) C16 (2) LTGRN/ BLK Left rear door open Check for voltage to ground: There should be less than 1 V. Faulty left rear door switch An open in the wire Left rear door closed Check for voltage to ground: There should be 5 V or more. Faulty left rear door switch Short to ground in the wire (1) '03 model (2) '04-06 models

Scheme 64

1. First make sure the brake lights come on when the brake pedal is pressed. If all the brake lights come on, go to step 2. If one of the brake lights does not come on, check whether the bulb is blown. If the bulb is OK, go to step 2. If none of the brake lights come on, check the brake light circuit (see «CIRCUIT DIAGRAM - BRAKE LIGHTS»(/acura/mdx/i-2000-2006/remont/exterior-lights/#exterior-lights) ).
2. Open the tailgate, and remove the left rear side trim (see «TRIM REMOVAL/INSTALLATION - REAR SIDE LOWER AREA»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-side-lower) ). The brake light failure sensor is mounted on the inside of the left rear side trim panel.
3. Make sure the BRAKE LAMP indicator does not come on and stay on when the brake light failure sensor connector is disconnected and the ignition switch is turned from OFF to ON (II). If the indicator comes on and then goes out, go to step 4. If the BRAKE LAMP indicator comes on and stays on, check for: A short to ground in the WHT/GRN wire between the safety indicator and the No. 4 *1 (or No. 2 *2 ) terminal of the failure sensors. A faulty safety indicator circuit in the gauge assembly. *1 : '03 model *2 : '04-'06 models
4. Reconnect the 6P connector.
5. Make sure the BRAKE LAMP indicator comes on and goes off when the No. 3 *1 (or No. 5 *2 ) terminal of the 6P connector is grounded, the brake pedal is pressed, and the ignition switch is turned from OFF to ON (II). If the BRAKE LAMP indicator comes on and stays on, check for a faulty sensor. If the BRAKE LAMP indicator goes off, check for: - A poor ground (G601). - An open in the WHT/GRN or BLK wire. *1 : '03 model *2 : '04-'06 models

See also:
• GAUGE ASSEMBLY REPLACEMENT
• CIRCUIT DIAGRAM - BRAKE LIGHTS
• TRIM REMOVAL/INSTALLATION - REAR SIDE LOWER AREA