Multiplex Integrated Control System (Except Hybrid): Other Honda Civic VIII рестайлинг

Using the HDS (Preferred method)

1. Go to B-CAN System Diagnosis Test Mode A to check for "Connected units" and DTCs (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-255545-S17855756892007060300000) ).
2. If no DTCs are retrieved, go to «B-CAN SYSTEM DIAGNOSIS TEST MODE C»(ref-255545-S31922710922007060300000) (see ) or D (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE D»(ref-255545-S08133960852007060300000) ).

Without HDS (Use only if the HDS is unavailable)

1. Check for communication circuit problems using B-CAN System Diagnostic Test (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-255545-S00787912052007060300000) ).
2. Check for DTCs.
3. Sort, and then troubleshoot the DTCs in the order below. 1 Battery voltage DTCs 2 Internal error DTCs 3 Loss of communication DTCs (beginning with the lowest number first; for example, if B1008 and B1011 are retrieved, troubleshoot B1008 first) 4 Signal error DTCs
4. If no DTCs are retrieved, use B-CAN System Diagnostic Test Mode 2 to check all inputs related to failure (see step 10 «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-255545-S00787912052007060300000) ).

How to display DTCs on the gauge control module (tach)

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 odometer display when the communication between the MICU and the gauge control module is normal. 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 multi-information display.

MICU REFERENCE

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.

Scheme 8

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

Gateway Function

The gauge control module (tach) acts as a gateway 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.

Scheme 9

Network "Loss of Communication" Error Checking Function

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

4-DOOR ERROR CODE LIST

2-DOOR ERROR CODE LIST

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

Scheme 10

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 OFF.

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 OFF, and the driver's door is opened, then closed, there is a delay 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 is opened or if a key is in the ignition.
5. The draw is reduced from 200 mA to less than 35 mA when in the sleep mode.

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 moves to the software fail-safe mode. The data that cannot be received is forced to 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 sends a MICU message and will not store DTCs.

POWER SUPPLY VOLTAGE MONITORING FUNCTION

Entry Lights Control System

The MICU controls the ceiling light ON/OFF and dimming based upon the input signals from each switch.

ENTRY LIGHTS CONTROL SYSTEM

Lighting System (Headlights, Parking Lights, Side Marker Lights, License Plate Lights, and Taillights)

The MICU contains the relay circuits of the headlight high/low beam and taillights, and controls the lighting system ON/OFF based upon the input signals from the combination light switch.

LIGHTING SYSTEM (HEADLIGHTS, PARKING LIGHTS, SIDE MARKER LIGHTS, LICENSE PLATE LIGHTS, AND TAILLIGHTS)

Daytime Running Lights

The MICU controls the exterior lights as a daytime running lights based upon the input signals from the each switch.

DAYTIME RUNNING LIGHTS

Turn Signal/Hazard Flasher

The MICU controls the turn signal/hazard flasher based upon the input signals from the turn signal and hazard warning switches.

TURN SIGNAL/HAZARD FLASHER

Power Door Locks (Vehicle Speed Sense)

The MICU controls the door lock actuators based upon the B-CAN and input signals.

POWER DOOR LOCKS (VEHICLE SPEED SENSE)

Keyless Entry System

The MICU controls the door lock actuators based upon the input signals of each switch and the B-CAN signals.

KEYLESS ENTRY SYSTEM

Keyless PANIC

The MICU controls the keyless PANIC based upon the B-CAN signals.

KEYLESS PANIC

Security Alarm System

The MICU controls the lighting system and horn based upon the input signals of each switch and the B-CAN signals.

SECURITY ALARM SYSTEM

Key-in Reminder

The MICU controls the door lock actuators based upon the IG1, the driver's door switch, and the driver's door lock knob switch signals.

KEY-IN REMINDER

Key Interlock (A/T)

The MICU controls the key interlock solenoid based upon the IG1, the transmission range switch, and the park-pin switch signals.

KEY INTERLOCK (A/T)

Wiper/Washer

The MICU controls the wiper motor and the washer motor based upon the IG1 and the wiper/washer switch signals.

WIPER/WASHER

Collision Detection Signal (CDS)

The MICU controls the door lock actuators based upon the IG1 and the B-CAN signals.

COLLISION DETECTION SIGNAL (CDS)

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.

HDS INPUTS AND COMMANDS (INPUT)

HDS INPUTS AND COMMANDS (FUNCTION TEST)

Troubleshooting - B-CAN System Diagnosis Test Mode A

Check the ECM/PCM for DTCs and troubleshoot ECM/PCM (see GENERAL TROUBLESHOOTING INFORMATION for R18A1 or GENERAL TROUBLESHOOTING INFORMATION ) or F-CAN loss of communication errors first, then perform this diagnosis if the symptom is related to the B-CAN system.

Scheme 11

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 trunk-open indicators Horns (security and panic) Chimes (key-in, seat belt, lights-on, and parking brake) Power window/moonroof timer Wiper/washer Security Keyless entry Power door locks Key interlock Dash light 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 (A), then turn the ignition switch 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 Gauge control module Immobilizer-keyless 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. 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»(ref-255545-S38198234042007060300000) . If all units are not communicating or only the MICU is communicating, go to «DTC B1000»(ref-255545-S06528306022007060300000) .
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»(ref-255545-S31922710922007060300000) if the system does not stop or turn off. Go to «TEST MODE D»(ref-255545-S08133960852007060300000) if the system does not run or turn on. 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 the troubleshooting for that individual system. Gauge control module Door-open and trunk-open indicators Chimes (key-in, seat belt, lights-on, and parking brake) Security Keyless entry Key interlock Dash light brightness Audio system Navigation (if equipped)
5. Record all DTCs, and sort them by DTC type. 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.
6. Troubleshoot the DTC(s) in the order listed above.

Troubleshooting - B-CAN System Diagnosis Test Mode B

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

1. Select the system that has the symptom from the BODY ELECTRICAL menu with the HDS..
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.
3. Do the input test for the unit not communicating with the HDS.

UNIT NOT COMMUNICATING

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 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 ). 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-255545-S17855756892007060300000) ). 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 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.
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. Is 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

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 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 ). 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.
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-255545-S17855756892007060300000) ). 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 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 circuit OK? YES - Go to step 6. NO - Replace the relay or repair the wire circuit.
6. Perform 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 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 - 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. 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 (MCIC) service connector 07WAZ-001010A