Multiplex Integrated Control System: Other Honda CR-V III рестайлинг

Using the HDS (Preferred method)

1. Connect the HDS to the DLC.
2. Read the B-CAN code with the HDS. First method, go to B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-371394-S05181719562010091000000) ) to check for DTCs. Second method, ground the SCS circuit with the HDS, read the DTCs displayed in the odometer display in the gauge assembly, then go to B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-371394-S05181719562010091000000) ).

Without HDS (Use only if the HDS is unavailable)

1. Check for communication circuit problems using B-CAN System Diagnostic Test Mode 1 and Mode 2 (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-371394-S37787464312010091000000) ).
2. Check for DTCs. NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-371394-S05181719562010091000000) ).
3. If no DTCs are retrieved, use B-CAN System Diagnostic Test Mode 2 to check all inputs related to failure (see step 10 ).

How to display DTCs on the gauge control module

Enter B-CAN System Diagnosis Test Mode 1 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) ). While in Test Mode 1, when communication between the MICU and the gauge control module is normal the DTCs which have been detected and stored individually by various B-CAN (Body-Controller Area Network) units will be shown one by on the odometer display. To scroll through the DTCs, press the SELECT/RESET button.

Scheme 7

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

ODOMETER DISPLAY REFERENCE CHART

How to clear DTCs

1. Enter B-CAN System Diagnosis Test Mode 1 (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-371394-S37787464312010091000000) )
2. While in Test Mode 1, press and hold down the SELECT/RESET button for more than 10 seconds to clear the DTCs.

MICU Control Functions Index

The MICU (built into the under-dash fuse/relay box) is one of the B-CAN components. The MICU controls many systems related to the body controller area network, and also works as a gateway to diagnose the other B-CAN circuits with the HDS.

Refer to each system circuit diagram for details.

MICU CONTROL FUNCTIONS INDEX

The MICU also controls the function of these circuits

1. Entry lights (map lights and ceiling light)
2. Exterior lights (including the daytime running lights)
3. Horn
4. Interlock system
5. Key-in reminder
6. Keyless entry
7. Lights-on reminder
8. Power door locks
9. Power window key-off timer
10. Seat belt reminder
11. Security alarm
12. Turn signal/hazard warning lights
13. Wiper/washer

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 a Gateway Function.

Scheme 8

1. The single wire method is used between the units not requiring communication to move at a fast speed.
2. Using a single wire method reduces the number of the wires used in the body controller area network.

Gateway Function

The gauge control module acts as a gateway to allow both systems to share information, the gauge control module translates and relays the information from B-CAN to F-CAN and from F-CAN to B-CAN.

Scheme 9

Network "Loss of Communication" Error Checking Function

The ECUs on the CAN circuit send messages to each other. If there are any communication malfunctions on the network, the odometer display on the gauge control module can indicate the error messages by entering the gauge self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).

Error Code List

ERROR CODE LIST

Note. For further information about Error indication, refer to the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ).

Wake-up and Sleep Function

The multiplex integrated control system has wake-up and sleep functions to decrease parasitic draw on the battery when the ignition switch is in the LOCK (0) position.

1. In the sleep mode, the MICU stops functioning (communication and CPU control) when it is not necessary for the system to operate.
2. As soon as any operation is requested (for example, a door is unlocked), the related control unit in the sleep mode immediately wakes up and begins to function.
3. When the ignition switch is turned to LOCK (0) with all the doors and the tailgate closed, and the driver's door is opened, then closed, there is a delay of about 40 seconds before the control unit goes from the wake-up mode to the sleep mode.
4. The sleep mode will not function if any door or tailgate is opened or if a key is in the ignition.

Note. Sleep and Wake-up Mode Test (see SLEEP AND WAKE-UP MODE TEST ).

Fail-safe Function

To prevent improper operation, the MICU has a fail-safe function. In the fail-safe mode, the output signal is fixed when any part of the system malfunctions (for example, a faulty control unit or communication line).

Each control unit has a hardware fail-safe function that fixes the output signal when there is a CPU malfunction, and a software fail-safe function that ignores the signal from a malfunctioning control unit, which allows the system to operate normally.

When a CPU problem or a abnormal power supply voltage is detected, the MICU moves to the hardware fail-safe mode, and each system output load is set to the pre-programmed fail-safe value.

Software Fail-safe Control

When any of the data from the B-CAN circuit cannot be received within a specified time, or an unusual combination of the data is recognized, the MICU defaults to its software fail-safe mode, and replaces the missing or unusual data with a pre-programmed value.

Power Supply Voltage Monitoring Function

The MICU monitors the power supply voltage (back-up voltage). If the voltage goes below 10 V, the MICU will not store DTCs.

POWER SUPPLY VOLTAGE MONITORING FUNCTION INPUT AND OUTPUT

Entry Lights Control System (Ceiling Lights, Map Lights, Ignition Key Light)

The MICU control of the map light and ceiling light ON/OFF is based on the input signals from each switch and B-CAN signal.

ENTRY LIGHTS CONTROL SYSTEM (CEILING LIGHTS, MAP LIGHTS, IGNITION KEY LIGHT) INPUT AND OUTPUT

Cargo Area Lights Control

The MICU control of the cargo area light ON/OFF is based on the input signals from tailgate latch switch.

CARGO AREA LIGHTS CONTROL INPUT AND OUTPUT

Collision Detection Signal (CDS)

The MICU control of the door lock actuators is based on the IG1 and the B-CAN signals.

COLLISION DETECTION SIGNAL (CDS) INPUT AND OUTPUT

Key Interlock

The MICU control of the key interlock solenoid is based on the ignition switch (ACC), the transmission range switch, and the park-pin switch signals.

KEY INTERLOCK INPUT AND OUTPUT

Key-in Reminder

The MICU control of the door lock actuators is based on the ignition key switch, the driver's door switch, and the driver's door lock knob switch signals.

KEY-IN REMINDER INPUT AND OUTPUT

Headlight

The MICU control of the headlight is based on the input signals from each switch.

HEADLIGHT INPUT AND OUTPUT

Daytime Running Lights

The MICU control of the exterior lights as daytime running lights is based on the input signals from each switch and B-CAN signals.

DAYTIME RUNNING LIGHTS INPUT AND OUTPUT

Turn Signal/Hazard Warning Lights

The MICU control of the turn signal/hazard warning lights is based on the input signals from the turn signal switch and the hazard warning switch.

TURN SIGNAL/HAZARD WARNING LIGHTS INPUT AND OUTPUT

Automatic Lighting System

The MICU control of the automatic lighting system is based on the input signals from each switch and the B-CAN signals.

AUTOMATIC LIGHTING SYSTEM INPUT AND OUTPUT

Windshield Wiper

The MICU control of the windshield wiper is based on the input signals from each switch and B-CAN signals.

WINDSHIELD WIPER INPUT AND OUTPUT

Windshield Wiper (Vehicle Speed Sensor)

The MICU control of the windshield wiper is based on the input signals from each switch and B-CAN signals.

WINDSHIELD WIPER (VEHICLE SPEED SENSOR) INPUT AND OUTPUT

Rear Window Wiper

The MICU control of the rear window wiper is based on the input signals from each switch.

REAR WINDOW WIPER INPUT AND OUTPUT

Windshield/Rear Window Washer

The MICU control of the washer operation is based on the input signals from washer switches.

WINDSHIELD/REAR WINDOW WASHER INPUT AND OUTPUT

Power Door Locks (1 motion all doors and tailgate unlock)

The MICU control of the door lock actuators is based on the input signals of each switch.

POWER DOOR LOCKS (1 MOTION ALL DOORS AND TAILGATE UNLOCK) INPUT AND OUTPUT

Power Door Locks (2 motions all doors and tailgate unlock)

The MICU control of the door lock actuators is based on the input signals of each switch.

POWER DOOR LOCKS (2 MOTIONS ALL DOORS AND TAILGATE UNLOCK) INPUT AND OUTPUT

Keyless Entry System (1 motion all doors and tailgate unlock)

The MICU control of the door lock actuators is based on the input signals of each switch and the B-CAN signals.

KEYLESS ENTRY SYSTEM (1 MOTION ALL DOORS AND TAILGATE UNLOCK) INPUT AND OUTPUT

Keyless Entry System (2 motions all doors and tailgate unlock)

The MICU control of the door lock actuators is based on the input signals of each switch and the B-CAN signals.

KEYLESS ENTRY SYSTEM (2 MOTIONS ALL DOORS AND TAILGATE UNLOCK) INPUT AND OUTPUT

Security Alarm System

The MICU control of the lighting system and horns is based on the input signals of each switch and the B-CAN signals.

SECURITY ALARM SYSTEM INPUT AND OUTPUT

A/C Pressure Switch

The MICU control of the A/C pressure switch is based on the ignition switch and A/C pressure switch.

A/C PRESSURE SWITCH INPUT AND OUTPUT

HDS Inputs and Commands

Certain inputs happen so quickly that the Data List on 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

HDS INPUTS

Function Test

FUNCTION TEST 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 10

1. Compare the symptom with this list of B-CAN related systems: Gauge control module Exterior lights Turn signals Entry light control Interior lights Door-open and tailgate-open indicators Horns (security and panic) Chimes (key-in, seat belt, lights-on, and parking brake) Power window/moonroof key-off timer Wiper/washer Security Keyless entry Power door locks Key interlock Dashlights brightness control Tailgate release actuator 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 (A), then turn the ignition switch to ON (II).
3. From the BODY ELECTRICAL system select menu, select UNIT INFORMATION, and then select CONNECTED UNIT to see if the following control units are communicating with the HDS. MICU Gauge control module Immobilizer-keyless control unit Climate control unit Automatic lighting 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" will be displayed. The HDS only checks the connected units status one time when BODY ELECTRICAL is selected. To check 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-371394-S40527092162010091000000) ). If all units are not communicating or only the MICU is communicating, go to DTC B1000 troubleshooting (see «DTC TROUBLESHOOTING»(ref-371394-S07164758222010091000000) ).
4. Select the system that has the problem from the BODY ELECTRICAL system select 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 and the system does not stop or turn off, go to B-CAN System Diagnosis Test Mode C (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE C»(ref-371394-S14833857382010091000000) ). If the problem is related to one of the following items and the system does not run or turn on, go to Test Mode D (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE D»(ref-371394-S02346937392010091000000) ). Exterior lights Turn signals Entry light control Interior lights Horn (security and panic) Wiper/washer If the problem is related to one of the following items, go to troubleshooting for that individual system. Gauge control module Door-open and tailgate-open indicator Chimes (key-in, seat belt, lights-on, and parking brake) Security Keyless entry Key interlock Dash lights brightness control Audio system Navigation (if equipped)
5. Record all DTCs, and troubleshoot them in this order: Battery voltage DTCs. Internal error DTCs. Loss of communication DTCs. Begin troubleshooting with the lowest number first (Example: if DTC B1008 and B1011 are retrieved, begin by troubleshooting B1008). 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 system select 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 -Faulty MICU, replace the under-dash fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-371395-S18403628942010091000000) )M
3. Do the power, ground, and communication part of the input test for the unit(s) not communicating with the HDS. NOT COMMUNICATING UNITS LIST Unit not communicating MICU (see «MICU INPUT TEST»(ref-371394-S01426272242010091000000) ) Gauge control module (see «GAUGE CONTROL MODULE INPUT TEST»(ref-371369-S42075400452010091000000) ) Immobilizer-keyless control unit (see «IMMOBILIZER-KEYLESS CONTROL UNIT INPUT TEST»(ref-371361-S26449555072010091000000) ) Automatic lighting control unit (see «AUTOMATIC LIGHTING CONTROL UNIT INPUT TEST/REPLACEMENT»(ref-371402-S39582266112010091000000) ) HandsFreeLink control unit (see «CONTROL UNIT INPUT TEST/REPLACEMENT»(ref-371430-S21195382082010091000000) ) Climate control unit troubleshooting (see «DTC INDICATOR G: CLIMATE CONTROL UNIT INTERNAL ERROR»(ref-371403-S14557197942010091000000) )

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 operate or 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 HDS INPUTS AND COMMANDS ).

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-371394-S05181719562010091000000) ). NO -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. Does the HDS indicate the switch is OFF? YES -Go to step 4. NO -Go to 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.
5. Test the relay, that controls the device that does not stop or turn off, if applicable. If the relay tests OK, 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. Test 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 work or 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 HDS INPUTS AND COMMANDS ).

1. Check the fuse of the malfunctioning output device. Is the fuse OK? YES -Go to step 2. NO -Replace the fuse and recheck.
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-371394-S05181719562010091000000) ). NO -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. Is there an output signal? YES -Go to step 5. NO -Go to 9 .
5. Test the relay and ground that controls the device that does not work, if applicable. If the relay and ground test OK, then check for an open or a short in the circuit for the malfunctioning component. Is 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 input and the ground 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. 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. Test 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. Is 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 (MCIS) Service Connector 07WAZ-00101OA

Test Mode 1

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

Scheme 11

1. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and No. 10 (7.5 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES -Go to step 2. NO -Find and repair the cause of the blown fuse.
2. Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(ref-371409-S29452308702010091000000) ).
3. Turn the ignition switch to ON (II), and move the ceiling light 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 ceiling light. When the ceiling light flashes quickly once, and then goes 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. Press the odometer select/reset 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. NOTE: If the test time out, remove the MPCS service connector, turn the ignition switch to LOCK (0), repeat step 3 and 4. Are any DTCs indicated? YES -Go to step 7. NO -Go to 10 .
7. Record all DTCs and troubleshoot them in this order: Battery voltage DTCs Internal error DTCs Loss of communication DTCs (begin with the lowest number first; for example, if B1008 and B1011 are retrieved, troubleshoot B1008 first) Signal error DTCs
8. Clear the DTCs by pressing and holding the select/reset button for about 13 seconds.
9. You will hear a beep to confirm the codes have been cleared. Operate the devices that failed, and recheck for codes. Test Mode 2
10. Remove the MPCS service connector from the under-dash fuse/relay box MICU service connector socket for 5-10 seconds, then re-insert it to enter Mode 2. When the system enters Mode 2, the ceiling light will flash two times quickly and then go off. NOTE: If the MPCS service 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 table lists 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 ceiling light will blink once. If the circuit is faulty, there will be no indication. MICU MICU CHECK LIST (TEST MODE 2) Item Audio switch A/C pressure sensor (ON) Back-up light switch (ON) Brake pedal position switch (ON) Dimmer switch (ON) Driver's door key cylinder switch (LOCK) (1) Driver's door key cylinder switch (UNLOCK) (1) Driver's door lock knob switch (LOCK) Driver's door lock knob switch (UNLOCK) Driver's door lock switch (LOCK) Driver's door lock switch (UNLOCK) Driver's door switch (OPEN) Front passenger's door lock knob switch (UNLOCK) (1) Front passenger's door lock switch (LOCK) Front passenger's door lock switch (UNLOCK) Front passenger's door switch (OPEN) Hazard warning switch (ON) Headlight switch (OFF) Headlight switch (ON) Hood switch (OPEN) (2) Ignition key switch (ON) Left rear door lock knob switch (UNLOCK) (1) Left rear door switch (OPEN) Lighting switch (ON) Passing switch (ON) Rear window wiper switch (AS) Rear window wiper switch (ON) Rear window washer switch (ON) Right rear door lock knob switch (UNLOCK) (1) Right rear door switch (OPEN) Seatbelt buckle switch (ON) Tailgate latch switch (OPEN) Tailgate outside handle switch Transmission range switch (P) Turn signal switch (LEFT) Turn signal switch (RIGHT) Windshield washer switch (AS) Windshield washer switch (ON) Windshield wiper HI/LO switch Windshield wiper INT/LO switch Windshield wiper intermittent dwell time controller Windshield wiper MIST switch (1) A second key is necessary to check the key cylinder inputs. Be sure to rotate the key cylinder switch two times to each position (lock and lock, unlock and unlock) to ensure the door lock knob switch is in the appropriate position. (2) With security Does the ceiling light work properly in all switch positions? YES -Go to function and input test for the system related to the failure. NO -Repair the open, short, or replace the faulty switch.