Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Tilt/Telescopic Steering Control Unit Input Test
2008 Acura MDXSECTION Power Tilt/Telescopic Steering Control Unit Input Test
NOTE:
Before testing the power till/telescopic steering control unit, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
).
- Turn the ignition switch to LOCK (0).
- Remove the steering column cover (see COLUMN COVER REMOVAL/INSTALLATION ).
- Disconnected the 16P connector (A) and 8P connector (B) from the power till/telescopic steering control unit (C).
- 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 5.
- Reconnect the connectors to the power tilt/telescopic steering control unit, and make these input tests at the connectors.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.WIRE CAVITY CHART
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A8 BLK Under all conditions Measure the voltage to ground:
There should be less than 0.5 V.- Poor ground (G503, G506)
- An open in the wire
B1 A1 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.- No. 4 (40 A) fuse in the main under-hood fuse box
- Blown No. 7 (10 A) fuse in the under-dash fuse/relay box
- An open in the wire
A9 YEL Ignition switch ON (II) Measure the voltage to ground:
There should be battery voltage.- Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
B3 WHT Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. 2 (OP2) (40 A) fuse in the main under-hood fuse box
- Blown No. 28 (20 A) fuse in the under-dash fuse/relay box
- An open in the wire
B5 GRN Under all conditions Measure the voltage to ground:
There should be battery voltage.- Blown No. 3 (P/W) (50 A) fuse in the main under-hood fuse box
- Blown No. 15 (20 A) fuse in the under-dash fuse/relay box
- An open in the wire
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.