Content .. 449 450 451 452 ..

Honda Ridgeline. Manual - part 451

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YES

Unit not communicating

22-100

Multiplex Integrated Control System

Troubleshooting - B-CAN System
Diagnosis Test Mode A (cont’d)

Troubleshooting - B-CAN System
Diagnosis Test Mode B

4. Select the system that has the problem from the

BODY ELECTRICAL menu, then select DTCs.

Go to step 5.

If the problem is related to one of the

following items, go to B-CAN System Diagnosis
Test Mode C (see page 22-101) if the system does
not stop or turn off. Go to Test Mode D (see page
22-102) if the system does not run or turn on.

• Exterior lights
• Turn signals
• Entry light control
• Interior lights
• Horns (security and panic)
• Power windows
• Wiper/washer

If the problem is related to one of the following
items, go to the troubleshooting for that individual
system.

• Gauge control module
• Safety indicators
• Chimes (key, seat belt and lights-on)
• Heated windshield wiper area (climate control)
• Security
• Keyless entry
• Climate control
• Key interlock
• Dash light brightness
• Audio system
• Navigation

5. Record all DTCs, and sort them by DTC type.

6. Troubleshoot the DTC(s) in this order:

• Battery voltage DTCs.
• Internal error DTCs.
• Loss of communication DTCs. Begin

troubleshooting with the lowest number first
(Example: if DTC B1006 and B1058 are retrieved,
begin by troubleshooting B1006).

• Signal error DTCs.

Perform this diagnosis if any of the control units are not
communicating (Not Available is displayed in the HDS)
as found by the B-CAN System Diagnosis Test Mode A
(see page 22-99).

1. Using the HDS, select the system that has the

symptom from the BODY ELECTRICAL menu.

2. Select DTCs, and then check for loss of

communication DTCs.

Go to step 3.

Replace the MICU.

3. Perform the input test for the unit not

communicating with the HDS.

MICU (see page 22-117)
Door multiplex control unit (see page 22-123)
Gauge control module (see page 22-122)
Relay control module (see page 22-125)
Combination switch control unit (see page
22-124)
HVAC control unit (see page 21-17)
Climate control unit (see page 21-96)

Ar e any DT Cs indicated?

Ar e any loss of communication DT Cs indicated?

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YES

22-101

Troubleshooting - B-CAN System Diagnosis Test Mode C

Perform this diagnosis if a component that is controlled
by the B-CAN system does not stop or turn off.

NOTE:

• If the component does not turn on, go to B-CAN

System Diagnosis Test Mode D (see page 22-102).

• See the B-CAN system unit input/output index for a

list of input and output devices and the control units
that monitor the input and controls the output devices
(see page 22-92).

• Always cycle the ignition switch within 3 seconds

when prompted in the DTC troubleshooting
procedures.

1. Check for DTCs by selecting the TEST MODE menu

from the HDS.

Go to B-CAN System Diagnosis Test Mode A

(see page 22-99).

Go to step 2.

2. Turn off the switch that controls the malfunctioning

component.

3. Select DATA LIST from the TEST MODE menu, and

check the input of the switch that controls the
component.

Go to step 4.

Go to step 6.

4. In the DATA LIST, check the output signal of the

malfunctioning component.

Go to step 5.

Replace the control unit that controls the

device that will not turn OFF (see page 22-92).

5. Check the relay, if applicable, then check for a short

in the wire between the relay and the component,
the relay and control unit, or the component and
control unit.

Replace the control unit that controls the

component that will not turn OFF.

Replace the relay or repair the wire

harness.

6. Check the switch, then check for a short in the wire

between the switch and the control unit that
monitors the switch.

Replace the control unit that monitors the

switch.

Replace the switch or repair the wire

harness.

Ar e any DT Cs indicated?

Does the HDS indicate the switch is OF F ?

Is the output signal OF F ?

Ar e the r elay and the wir e har ness OK ?

Is the switch and wir e har ness OK ?

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−

YES

22-102

Multiplex Integrated Control System

Troubleshooting - B-CAN System Diagnosis Test Mode D

Perform this diagnosis if a component that is controlled
by the B-CAN system does not run or come on.

NOTE:

• If the component does not turn off or stop, go to B-

CAN System Diagnosis Test Mode C (see page
22-101).

• See the B-CAN system unit input/output index for a

list of input and output devices and the control units
that monitor the input and controls the output devices
(see page 22-92).

• Always cycle the ignition switch within 3 seconds

when prompted in the DTC troubleshooting
procedures.

1. Check the fuse of the malfunctioning output device.

Go to step 2.

Replace the fuse and recheck.

2. Check for DTCs by selecting the TEST MODE menu

from the HDS.

Go to B-CAN System Diagnosis Test Mode A

(see page 22-99).

Go to step 3.

3. Turn ON the switch that controls the

malfunctioning component.

4. Select DATA LIST from the TEST MODE menu, and

check output signal for the malfunctioning
component.

Go to step 5.

Go to step 9.

5. Check the relay and ground, then check for an open

or a short in the circuit for the malfunctioning
component.

Go to step 6.

Replace the relay or repair the wire circuit.

6. Perform the function test for the malfunctioning

component.

Go to step 7.

Replace the component.

7. With the malfunctioning output device connected,

connect a voltmeter between the malfunctioning
output device and body ground on the wire that the
control unit uses to control the output device circuit.

8. Select MISC. TEST from the TEST MODE menu,

and do the forced operation test of the
malfunctioning component.

Replace the component.

Replace the control unit that controls the

malfunctioning component.

9. Select DATA LIST from the TEST MODE menu, and

make sure the switch signal input for the
malfunctioning system indicates a change when
operated.

Replace the control unit that controls the

malfunctioning component.

Go to step 10.

10. Check the switch and its ground (if applicable), then

check for an open or a short in the wire between
the switch and the control unit that monitors it.

Replace the control unit that monitors the

switch.

Replace the switch or repair the wire

harness.

Is the f use OK ?

Ar e any DT Cs indicated?

Is ther e an output signal?

Ar e the r elay and cir cuit OK ?

Does the output device pass the f unction test?

Is ther e a change in voltage ( 12 V to 0 V or
0 V to 12 V )?

Does the switch input indicated ON when the
switch is ON?

Is the switch and the wir e har ness OK ?

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０１

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Special Tools Required

YES

Test Mode 2

Test Mode 1

22-103

Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2
(without the HDS)

A
(07WAZ-001010A)

MPCS (MCIC) service connector 07WAZ-001010A

Check the PCM for DTCs and troubleshoot PCM or
F-CAN loss of communication errors first (see page
11-3), then perform this diagnosis if the HDS is not
available.

1. Check the No. 7 (7.5 A) fuse and No. 21 (7.5 A) fuse

in the under-dash fuse/relay box.

Go to step 2.

Find and repair the cause of the blown fuse.

2. Remove the left kick panel (see page 20-60).

3. Turn the ignition switch ON (II), and move the

interior lights switch to the middle (door) position.

4. Connect the MPCS service connector (A) to the

MCIC socket (B) in the under-dash fuse/relay box.

5. Wait 5 seconds, and watch the map lights. When

the front and rear map lights flash quickly once,
and then go off, the system is in Test Mode 1.

6. Check for B-CAN DTCs indicated by the gauge

control module odometer/trip meter display while
still in Test Mode 1. Push the odometer trip meter
select/switch button to display the next code. After
you get to the last code, the display shows END. If
no DTCs are stored, the display will read NO.

Go to step 7.

Go to step 10.

7. Record all DTCs and sort them.

8. Troubleshoot the DTCs in this order:

• Battery voltage DTCs
• Internal error DTCs
• Loss of communication DTCs (begin with the

lowest number first; for example, if B1006 and
B1059 are retrieved, troubleshoot B1006 first)

• Signal error DTCs

9. Clear the DTCs by pressing and holding the select/

reset knob for about 13 seconds. You will hear a
beep to confirm the code have been cleared.
Operate the devices that failed, and recheck for
codes.

10. Remove the MPCS service connector from the

under-dash fuse/relay box socket for
5

10 seconds, then re-insert it to enter Mode 2.

When the system enters Mode 2, the front and rear
map lights will flash two times quickly and then go
off.

NOTE: If the MPCS connector is disconnected for
too short or too long of a time, or the ignition
switch is turned OFF, the system will return to Test
Mode 1.

11. The following tables list the circuits that can be

checked in Test Mode 2. Operate the switch that is
most closely related to the problem. If the circuit is
OK, the map lights will blink once. If the circuit is
faulty, there will be no indication.

(cont’d)

Ar e the f uses OK ?

Ar e any DT Cs indicated?

Content .. 449 450 451 452 ..