Multiplex Integrated Control System: Other Honda Ridgeline I рестайлинг

Using the HDS (Preferred Method)

Connect the HDS to the Data Link Connector (DLC)

There are two ways to read B-CAN code with the HDS

1. First method: If multiple DTCs are stored, be sure to follow the instructions in the B-CAN system diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. Second method: If no DTCs are retrieved, use the B-CAN System Diagnostic Test Mode 2 (see «Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)»(ref-336494-S25849519332009072700000) ) to check all inputs related to the failure.

How to display DTCs on the gauge control module

Enter the B-CAN System Diagnosis Test Mode 1 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ). While in Test Mode 1, the DTCs which have been detected and stored individually by various B-CAN (Body-controller Area Network) units will be shown one by one on the Multi-information display when the communication between the MICU and the gauge control module is normal. To scroll through the DTCs, press the select/reset switch on the gauge control module.

Scheme 10

The unit that has stored the code can be identified by the number shown on the multi-information display.

MULTI-INFORMATION DISPLAY CHART

Body Controller Area Network (B-CAN) and Fast Controller Area Network (F-CAN)

The body controller area network (B-CAN) and the fast controller area network (F-CAN) share information between multiple electronic control units (ECUs). B-CAN communication moves at a slower speed (33.33 kbps) for convenience related items and for other functions. F-CAN information moves at a faster speed (500 kbps) for "real time" functions such as fuel and emissions data. To allow both systems to share information, the gauge control module translates information from B-CAN to F-CAN and from F-CAN to B-CAN. This is called the Gateway Function.

The ECUs on the B-CAN and the F-CAN transmit and receive information in the form of structured messages that may be received by several different ECUs on the network at one time. These messages are transmitted and received across a communication circuit that consists of a single wire that is shared by all the ECUs on the circuit. Since messages on the F-CAN are typically of higher importance, a second wire is used for communication circuit integrity monitoring. A backup circuit is also added to the headlight and wiper circuits on the B-CAN in the event of a network wire or ECU failure that would effect the operation of the system.

Scheme 11

Messages are transmitted by an ECU (that monitors an input) over the communication circuit. ECUs that use the message (information related to that input) are the receivers. For example, the combination switch control unit monitors the wiper switch. When the wiper switch is placed in the low speed position, the combination switch control unit transmits that message on the communication circuit. The relay control module receives the message and turns on the wipers by providing a ground for the relay.

Scheme 12

Connected ECUs

Several ECUs are connected to each of the two networks. The gauge control module is part of both networks since it is the "gateway" between them. Here is a list of ECUs and the network they are connected to.

B-CAN ECUs

1. Gauge control module
2. Relay control module
3. Multiplex integrated control unit (MICU)
4. Door multiplex control unit
5. Combination switch control unit
6. HVAC control unit/climate control unit
7. HandsFreeLink control unit

F-CAN ECUs

1. Gauge control module
2. PCM
3. VSA (vehicle stability assist)
4. TPMS control unit
5. VTM-4 control unit
6. Steering angle sensor
7. SRS unit

Scheme 13

Network "Loss of Communication" Error Checking

The B-CAN and the F-CAN send messages to each other to check the integrity of the network communication circuit. They do this by sending a specific digital message out after an event. For example, after turning the ignition switch to ON (II). All the ECUs on the communication circuit expect to receive a message from other specific units within a specified amount of time. If the message is not received, the ECU will transmit a DTC reporting that it did not receive the message.

B-CAN System Unit Input/Output Device controlled

SWITCH/SIGNAL INPUT REFERENCE CHART

SWITCH/SIGNAL INPUT REFERENCE CHART

SWITCH/SIGNAL INPUT REFERENCE CHART

SWITCH/SIGNAL INPUT REFERENCE CHART

SWITCH/SIGNAL INPUT REFERENCE CHART

SWITCH/SIGNAL INPUT REFERENCE CHART

HDS Inputs and Commands

Certain inputs happen so quickly that the HDS cannot update fast enough. Hold the switch that is being tested while monitoring the Data List.

This should give the HDS time to update the signal on the Data List.

Because the HDS software is updated to support the release for newer vehicles it is not uncommon to see system function tests that are not supported.

Make sure that the most current software is loaded.

Input

DATA INDICATION REFERENCE CHART

Output

DATA INDICATION REFERENCE CHART

Troubleshooting - B-CAN System Diagnosis Test Mode A

Check the PCM for DTCs and troubleshoot PCM (see GENERAL TROUBLESHOOTING INFORMATION ) or F-CAN loss of communication errors first, then do this diagnosis if the symptom is related to the B-CAN system.

Note. Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this section.

Scheme 14

1. Compare the symptom with this list of B-CAN related systems: Gauge control module Exterior lights Turn signals Entry light control Interior lights Safety indicators Heated windshield wiper area Horns (security and panic) Beepers (key, seat belt, lights-on, and parking brake) Power windows Power window/moonroof timer Wiper/washer Security Keyless entry Power door locks HVAC/Climate Control Key interlock Dashlight brightness Is the symptom related to the B-CAN system? YES -Go to step 2. NO -Go to the system troubleshooting for the system with the symptom.
2. Connect the HDS to the data link connector, then turn the ignition switch to ON (II).
3. From the BODY ELECTRICAL menu, select UNIT INFORMATION, and then select CONNECTED UNIT listed to see if the following control units are communicating with the HDS. MICU Door multiplex control unit Gauge control module Combination switch control unit Relay control module Climate control unit/HVAC control unit HandsFreeLink control unit NOTE: If a unit is communicating with the HDS, DETECT will be displayed. If a unit is not communicating or the vehicle is not equipped, ''NOT AVAILABLE" is displayed. The HDS only checks the connected units status one time when BODY ELECTRICAL is selected. To recheck the status after repair, reboot the HDS and repeat step 3. Are all control units communicating with the HDS? YES -Go to step 4. NO -If any of the control units are not communicating, go to B-CAN System Diagnosis Test Mode B (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE B»(ref-336494-S11001251792009072700000) ). If all units are not communicating or only the MICU is communicating, go to DTC B1000 troubleshooting (see «DTC TROUBLESHOOTING»(ref-336494-S27862109772009072700000) ).
4. Select the system that has the problem from the BODY ELECTRICAL menu, then select DTCs. Are any DTCs indicated? YES -Go to step 5. NO -If the problem is related to one of the following items, go to B-CAN System Diagnosis Test Mode C (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE C»(ref-336494-S22263558472009072700000) ) if the system does not stop or turn off. Go to Test Mode D (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE D»(ref-336494-S38118040002009072700000) ) 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

1. Battery voltage DTCs
2. Internal error DTCs
3. Loss of communication DTCs
4. Signal error DTCs

Troubleshooting - B-CAN System Diagnosis Test Mode B

Do 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 TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

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. Are any loss of communication DTCs indicated? YES -Go to step 3. NO -Replace the MICU: replace the under-dash fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-336491-S16377093952009072700000) ).
3. Do the power, ground, and communication part of the input test for the unit(s) not communicating with the HDS.

COMMUNICATING UNIT REFERENCE CHART

Troubleshooting - B-CAN System Diagnosis Test Mode C

Do 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 TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE D ). 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 B-CAN SYSTEM UNIT INPUT/OUTPUT DEVICE CONTROLLED ). Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this section.

1. Check for DTCs by selecting the TEST MODE menu from the HDS. Are any DTCs indicated? YES -Go to B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ). • NO -Go to step 2.
2. Turn off the switch that controls the malfunctioning component.
3. Select the applicable system from the system MODE MENU, then select DATA LIST, and check the input of the switch that controls the component. Does the HDS indicate the switch is OFF? YES -Go to step 4. NO -Go to step 6
4. In the DATA LIST, check the output signal of the malfunctioning component. Is the output signal OFF? YES -Go to step 5. NO -Replace the control unit that controls the device that will not turn OFF (see «B-CAN SYSTEM UNIT INPUT/OUTPUT DEVICE CONTROLLED»(ref-336494-S24180138792009072700000) ).
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. Are the relay and the wire harness OK? YES -Replace the control unit that controls the component that will not turn OFF. • NO -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.

Are the switch and wire harness OK?

YES -Replace the control unit that monitors the switch.

NO -Replace the switch or repair the wire harness.

Troubleshooting - B-CAN System Diagnosis Test Mode D

Do 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 TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE C ). 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 B-CAN SYSTEM UNIT INPUT/OUTPUT DEVICE CONTROLLED ). Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this section.

1. Check the fuse of the malfunctioning output device. Is the fuse OK? YES -Go to step 2. NO -Replace the fuse and recheck. If the fuse is blown again, repair a short to ground on the fuse circuit of the malfunctioning device.
2. Check for DTCs by selecting the TEST MODE menu from the HDS. Are any DTCs indicated? YES -Go to B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ). • NO -Go to step 3.
3. Turn ON the switch that controls the malfunctioning component.
4. Select the applicable system from the system MODE MENU, then select DATA LIST, and check output signal for the malfunctioning component. Is there an output signal? YES -Go to step 5. NO -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. Are the relay and the circuit OK? YES -Go to step 6. NO -Replace the relay or repair the wire circuit.
6. Do the function test for the malfunctioning component. Does the output device pass the function test? YES -Go to step 7. NO -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 FUNCTIONAL TEST from the MODE MENU, and do the forced operation test of the malfunctioning component. Is there a change in voltage (12 V to 0 V or 0 V to 12 V)? YES -Inspect the ground for the component. If OK, replace the component. • NO -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. Does the switch input indicated ON when the switch is ON? YES -Replace the control unit that controls the malfunctioning component. • NO -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.

Are the switch and the wire harness OK?

YES -Replace the control unit that monitors the switch.

NO -Replace the switch or repair the wire harness.

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

Special Tools Required

MPCS (MCIC) service connector 07WAZ-001010A

Test Mode 1

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

Scheme 15

1. Check the No. 7 (7.5 A) fuse and No. 21 (7.5 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES -Go to step 2. NO -Replace the fuse, and recheck. If the fuse is blown again, repair the short to body ground on the fuse circuit(s).
2. Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(ref-336498-S00856079632009072700000) ).
3. Turn the ignition switch to ON (II), and move the interior lights switch to the middle (door) position.
4. Connect the MPCS (MCIC) service connector (A) to the MICU service check connector 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 (see «HOW TO DISPLAY DTCS ON THE GAUGE CONTROL MODULE»(ref-336494-S37268054162009072700000) ). Are any DTCs indicated? YES -Go to step 7. NO -Go to step 10
7. Record all DTCs and sort them into these categories. Battery voltage DTCs Internal error DTCs Loss of communication DTCs Signal error DTCs
8. Clear the DTCs by pressing and holding the select button for about 13 seconds.
9. You will hear a beep to confirm the code have been cleared. Operate the devices that failed, and recheck for codes. Test Mode 2
10. Remove the MPCS (MCIC) 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 to LOCK (0), 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.

MICU

SWITCH REFERENCE CHART

RELAY CONTROL MODULE

RELAY CONTROL MODULE REFERENCE CHART

COMBINATION SWITCH CONTROL UNIT

COMBINATION SWITCH CONTROL UNIT REFERENCE CHART

POWER WINDOW MASTER SWITCH (DOOR MULTIPLEX CONTROL UNIT)

POWER WINDOW MASTER SWITCH (DOOR MULTIPLEX CONTROL UNIT) REFERENCE CHART

GAUGE CONTROL MODULE

GAUGE CONTROL MODULE REFERENCE CHART

Do the map lights indicate proper switch operation?

YES -Go to function and input test for the system related to the failure.

NO -Repair the open, short, or replace the faulty switch.

Scheme 16

Scheme 17