Gauges: Overview Honda Pilot II

Scheme 18

Scheme 19

Self-Diagnostic Function

Note. Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

The gauge control module has a self-diagnostic function which consists of the following checks

1. The beeper drive circuit check.
2. The indicator drive circuit check.
3. The switch input test.
4. The LCD segments check.
5. The gauge drive circuit check (Tachometer, Fuel gauge, Speedometer, Engine coolant temperature gauge).
6. The communication line check (of the body-controller area network (B-CAN) communication line and the fast-controller area network (F-CAN) communication line between the gauges).

Note. Indicators are also controlled via the communication line.

Entering the self-diagnostic function with the HDS

Using the HDS, select Body Electrical, Gauges, then Function Test and do the self-diagnostic function.

Entering the self-diagnostic function (manual method)

Before doing the self-diagnostic function, make sure the No. 10 (7.5 A) fuse in the under-dash fuse/relay box and the No. 23 (10 A) fuse in the under-hood fuse/relay box are OK.

1. Push and hold the SEL/RESET switch button.
2. Turn the combination light switch ON.
3. Turn the ignition switch to ON (II).
4. Within 5 sec, turn the combination light switch OFF, then ON and OFF again.
5. Within 5 sec, release the SEL/RESET switch button, and then push and release the button three times repeatedly.

Note. While in the self-diagnostic mode, the dash lights brightness controller operates normally. While in the self-diagnostic mode, the SEL/RESET button is used to start the Beeper Drive Circuit Test and the Gauge Drive Circuit Check. If the vehicle speed exceeds 1.2 mph (2 km/h) or the ignition switch is turned to LOCK (0), the self-diagnostic mode ends.

Scheme 20

Description

The outside temperature sensor is located behind the left side of the front bumper. The gauge control module uses measurements from this sensor along with data provided by the climate control unit that is transmitted via B-CAN communication bus line, to display the outside air temperature.

Because of the location of the sensor, it may be affected by heat reflection from the road, engine and radiator heat, or hot exhaust from surrounding traffic.

These conditions can heat soak the outside air temperature sensor and cause inaccurate readings. Logic has been written into the gauge control module to help prevent abnormal or fluctuating outside air temperature indicator readings.