Honda HR-V: Testing

MICU INPUT TEST

NOTE :

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks,.
• Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
• Before testing, make sure the No. B21 (10 A) fuse in the under-hood fuse/relay box is OK.

1. Turn the vehicle to the OFF (LOCK) mode

2. Disconnect under-dash fuse/relay box connectors D, G, H, N, and Q.

NOTE : All connector views are shown from the wire side of the female terminals.: All connector views are shown from the wire side of the female terminals.

3. Inspect the connectors and socket terminals to be sure they are all making good contact:

• If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
• If the terminals are OK, go to step 4.

4. With the connectors still disconnected, do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, go to step 5.

*1: Without keyless access system
*2: With keyless access system
*3: Display audio type
*4: Color audio type
*5: With navigation

*1: Without keyless access system
*2: With keyless access system
*3: Display audio type
*4: Color audio type
*5: With navigation

5. Reconnect the connectors to the under-dash fuse/relay box, and do the following input tests:

• If any test indicates a problem, find and correct the cause, then recheck the system.
• If all the input tests prove OK, the MICU must be faulty; replace the under-dash fuse/relay box.

MULTIPLEX INTEGRATED CONTROL SYSTEM SLEEP AND WAKE-UP MODE TEST

1. Shift to the sleep mode: Close all doors. Turn the vehicle to the OFF (LOCK) mode, then open and close the driver's door. If the MICU receives no signals from the inputs listed below, it will go into sleep mode in less than 40 seconds.

• IG1 power supply
• IG2 power supply
• B-CAN data
• Hazard warning switch (OFF)

2. Confirm sleep mode:

NOTE : Check the official Honda service website for more service information about parasitic draw at the 12 volt battery. Check the parasitic draw at the 12 volt battery while entering sleep mode; amperage should change from about 200 mA to less than 35 mA in less than 40 seconds

3. Shift to wake-up mode: When the vehicle is turned to ON mode, the MICU, the gauge control module, the keyless access control unit*

1, the immobilizer-keyless control unit*

2, and the PCM will wake-up at the same time without "talking" to each other through the communication lines.

When any switch in the multiplex integrated control system is turned on, it wakes up its related control unit which, in turn, wakes up the other units. After confirming the sleep mode, look in the following table for the switch most related to the problem. Operate that switch and see if its control unit wakes up.

*1: With keyless access system
*2: Without keyless access system

NOTE : If any control unit is faulty and does not wake up, several circuits in the system malfunction at the same time. Below is a list of the switches and input signals that wake them up.

• IG1 power supply
• IG2 power supply
• ACC power supply
• B-CAN data
• Driver's door lock switch (LOCK/UNLOCK)
• Driver's door switch (Open)
• Front passenger's door switch (Open)
• Left rear door switch (Open)
• Right rear door switch (Open)
• Tailgate latch switch (Open)
• Tailgate outer handle switch (Open)
• Driver's door key cylinder switch (LOCK/UNLOCK)
• Driver's door lock knob switch (LOCK/UNLOCK)
• Front passenger's door lock knob switch (UNLOCK)
• Left rear door lock knob switch (UNLOCK)
• Right rear door lock knob switch (UNLOCK)
• Security hood switch (Open)
• Hazard warning switch (ON)
• Combination light switch (Parking, Headlight, Dimmer, Passing, Fog ON)
• Ignition key switch (Key inserted)

CIRCUIT DIAGRAM

MULTIPLEX INTEGRATED CONTROL SYSTEM CIRCUIT DIAGRAM

COMPONENT LOCATION INDEX

MULTIPLEX INTEGRATED CONTROL SYSTEM COMPONENT LOCATION INDEX

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