2010 Acura Truck MDX V6-3.7L Page 30

Go to step 11.

NO -

Repair a short to power in the wire between the rear fuse/relay box and the affected control unit.?

11. Check for continuity between under-dash fuse/relay box connector N (45P) terminal No. 22 and body ground.

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 12.

12. Turn the ignition switch to ON (II).

13. Measure the voltage between under-dash fuse/relay box connector N (45P) terminal No. 22 and body ground.

Is there battery voltage?

YES -

Repair a short to power in the wire.?

NO -

Faulty MICU, replace the under-dash fuse/relay box.?

B1001

DTC Troubleshooting: B1001, B1002

DTC B1001:

MICU Internal Error (CPU error)

2010 Acura Truck MDX V6-3.7L Page 104

Go to step 11.

11. Check for continuity between climate control unit connector A (40P) terminals No. 6 and No. 11.

Is there continuity?

YES -

Repair a short in the wires.?

NO -

Go to step 12.

12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector A (40P) terminal No. 11 and body

ground.

Is there any voltage?

YES -

Repair a short to power in the wire between the climate control unit and the driver's air mix control motor. This short may also damage the climate

control unit. Repair a short to power before replacing the climate control unit.?

NO -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:

Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?

13. Turn the ignition switch to LOCK (0), and disconnect the climate control unit connector A (40P).

14. Disconnect these items:

- Driver's air mix control motor

- Passenger's air mix control motor

- Rear air mix control motor

- Humidity/in-car temperature sensor

- A/C pressure sensor

15. Check for continuity between climate control unit connector A (40P) terminal No. 6 and body ground.

2010 Acura Truck MDX V6-3.7L Page 274

Go to step 11.

NO -

Repair an open in the wire.?

11. Check for continuity between front passenger's door subharness 16P connector terminal No. 4 and body ground.

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 12.

12. Check for continuity between front passenger's door subharness 16P connector terminals No. 4 and No. 6.

Is there continuity?

YES -

Repair a short in the wires.?

NO -

Go to step 13.

13. Reconnect front passenger's MPCS unit connector A (28P).

14. Turn the ignition switch to ON (II).

15. Measure the voltage between front passenger's door subharness 16P connector terminal No. 4 and body ground.