Multiplex Integrated Control System: Diagnosis Honda Insight ZE2

Troubleshooting CAN Circuit Related Problems

Note. Check the PCM for DTCs and troubleshoot PCM (see GENERAL TROUBLESHOOTING INFORMATION ) or F-CAN loss of communication errors first.

Using the HDS (Preferred method)

Connect the HDS to the Data Link Connector (DLC).

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

First method: Go to B-CAN System Diagnosis Test Mode A to check for DTCs (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Second method: Ground the SCS circuit with the HDS, then read the DTCs displayed in the multi-information display (MID) in the gauge assembly, then go to B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

Using the B-CAN System Diagnosis Test Mode 1 (Use only if the HDS is unavailable)

1. Check for communication circuit problems using B-CAN System Diagnostic Test Mode 1 (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-360288-S18725751082010042800000) ).
2. Check for DTCs.
3. If there are DTCs stored, sort them, and then troubleshoot the DTCs in this order. Battery voltage DTCs Internal error DTCs Loss of communication DTCs NOTE: If DTC B1000 is stored, troubleshoot DTC B1000 first (see «DTC B1000: COMMUNICATION CIRCUIT ERROR (BUS-OFF)»(ref-360288-S10849250832010042800000) ). Signal error DTCs
4. If no DTCs are retrieved, use B-CAN System Diagnostic Test Mode2 to check all inputs related to the failure (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-360288-S18725751082010042800000) ).

Loss of Communication DTC cross-reference chart

When an ECU on the CAN circuit is unable to communicate with the other ECUs on the B-CAN and F-CAN circuits, the other control units will set loss of communication DTCs. Use this chart to find the control unit that is not communicating with the other control units on the CAN circuit.

1. Find the Transmitting Control Unit that is in the same row as all of the loss of communication DTCs retrieved.
2. Do the input test for the transmitting control unit. Bus Off and Internal Error Codes

DTC CHART

TRANSMITTING CONTROL UNIT CHART

DTC Troubleshooting Index

Note. Record all DTCs, and sort them by DTC type using the following DTC troubleshooting indexes, then troubleshoot the DTC(s) in this order

1. Battery voltage DTCs
2. Internal error DTCs
3. Loss of communication DTCs (beginning with the lowest number first; for example, if B1011 and B1155 are retrieved, troubleshoot B1011 first).
4. Signal error DTCs

MICU

DTC DESCRIPTION

Gauge Control Module

DTC DESCRIPTION

Immobilizer-Keyless Control Unit

DTC DESCRIPTION

HandsFreeLink Control Unit

DTC DESCRIPTION

Climate Control Unit

DTC DESCRIPTION

Self-diagnostic Function (On-board diagnosis)

By connecting the HDS to the data link connector (DLC), the HDS can retrieve the diagnostic information from the MICU via a diagnostic line called the K-LINE. The K-LINE is separate communication line from the CAN lines, but it is connected to most of the CAN related ECUs. The MICU is a gateway between the HDS and B-CAN related ECUs, and sends B-CAN diagnostic information to the HDS. When doing a function test with the HDS, the HDS sends an output signal through the K-LINE to the MICU. The MICU either relays the request to another ECU, or commands the function itself.

Scheme 2

Test Mode 1

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 HDS is not available.

Scheme 3

1. Check the No. 1 (15 A) and the No. 22 (7.5 A) fuses 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 fuse access panel (see «FUSE ACCESS PANEL REMOVAL/INSTALLATION»(ref-360309-S27145619612010042800000) ).
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 MICU service check connector 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 multi-information display (MID) on the gauge control module while still in Test Mode 1. Press the SEL/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 (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-360288-S07685226352010042800000) ). NOTE: If the test times out, remove the MPCS service connector, turn the ignition switch to LOCK (0), and repeat steps 3 and 4 . Are any DTCs indicated? YES -Go to step 7. NO -Go to step 11 .
7. Record all DTCs and sort them into these categories: Battery voltage DTCs Internal error DTCs Loss of communication DTCs Signal error DTCs
8. Troubleshoot the DTCs in the order listed above.
9. Clear the DTCs by pressing and holding the SEL/RESET button for at least 10 seconds.
10. You will hear a beep to confirm the codes have been cleared. Operate the devices that failed, and recheck for codes.

Test Mode 2

1. 11. Remove the MPCS service connector from the under-dash fuse/relay box MICU service check connector socket for 5-10 seconds, then re-insert it to enter Mode 2. When the system enters Mode 2, the ceiling light flashes two times quickly and then goes 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 returns to Test Model.
2. 12. 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 ceiling light will blink once. If the circuit is faulty, there will be no indication. MICU MICU SPECIFICATIONS Item Brake pedal position switch Driver's door switch Driver's rear door switch Trunk lid/Tailgate latch switch Driver's rear door lock knob switch (UNLOCK) Windshield wiper switch (LOW) Windshield wiper switch (HIGH) Windshield wiper switch (INT) Windshield wiper switch (MIST) Rear wiper switch Windshield washer switch Rear washer switch Wiper intermittent dwell time controller Turn signal switch (LEFT) Turn signal switch (RIGHT) Hazard warning switch Headlight switch (OFF) Headlight switch (PARKING) Headlight switch (HEADLIGHT) Headlight switch (High Beam) Headlight switch (PASSING) Trunk handle switch A/C pressure switch/Thermal protector Transmission range switch (P) Ignition key cylinder switch Security hood switch Back-up light switch Windshield wiper motor PARK switch Front passenger's door switch Passenger's rear door switch Passenger's rear door lock knob switch (UNLOCK) Audio unit or Audio-navigation unit Driver's door lock switch (UNLOCK) Driver's door lock switch (LOCK) Driver's door lock knob switch (UNLOCK) Driver's door lock knob switch (LOCK) Driver's door key cylinder switch (UNLOCK) (1) Driver's door key cylinder switch (LOCK) (1) Front passenger's door lock knob switch (UNLOCK) (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. 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.

Sleep and Wake-up Mode Test

1. Shift to the sleep mode: Close all doors. Turn the ignition switch to LOCK (0), and remove the key, then open and close the driver's door. If the MICU receives no further inputs signals, it will go into sleep mode in less than 40 seconds.
2. Confirm the sleep mode: NOTE: Check any official Honda service website for more service information about parasitic draw at the battery. Check the parasitic draw at the battery after 40 seconds; amperage should change to less than 35 mA in less than 50 seconds.
3. Shift to the wake up mode: When the ignition switch is turned to ON (II), the MICU, gauge control module, immobilizer-keyless control unit, climate control unit, HandsFreeLink control unit, and PCM 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. NOTE: If any control unit is faulty and will not wake up, several circuits in the system will malfunction at the same time. The table below is a list of the switches and the input signals that wake them up. Driver's door switch (door open) Driver's rear door switch (door open) Trunk lid/Tailgate latch switch (hatch open) Trunk handle switch (switch pressed) Driver's rear door lock knob switch Security hood switch (hood open) Hazard warning switch (ON) Combination light switch (Parking, Headlight, High Beam, Passing) Ignition key cylinder switch (key inserted) Audio unit or audio-navigation unit switch (switch pressed) Driver's door, key cylinder switch (LOCK/UNLOCK) Passenger's rear door lock knob (UNLOCK) Front passenger's door lock knob (UNLOCK) Driver's door lock switch (LOCK/UNLOCK) Front passenger's door switch (door open) Passenger's rear door switch (door open)

Scheme 4

Scheme 5

MICU Input Test

Note. Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ). Before testing, check the No. 1 (15 A), No. 10 (7.5 A), No. 14 (7.5 A), No. 20 (15 A) and No. 22 (7.5 A) fuses in the under-dash fuse/relay box.

Scheme 6

1. Turn the ignition switch to LOCK (0).
2. Remove the fuse access panel (see «FUSE ACCESS PANEL REMOVAL/INSTALLATION»(ref-360309-S27145619612010042800000) ), and remove the driver's dashboard lower cover (see «FUSE ACCESS PANEL REMOVAL/INSTALLATION»(ref-360309-S27145619612010042800000) ).
3. Disconnect under-dash fuse/relay box connectors A, B, K, M, N, and Q. NOTE: All connector views are shown from wire side of female terminals.
4. Inspect the connector and socket terminals to make 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 look OK, go to step 5.
5. With the connectors still disconnected, make these input tests at the connectors. 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 6. WIRE SPECIFICATIONS Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A25 (1) RED VSA modulator-control unit 47P connector disconnected Check for continuity between terminal A25 and VSA modulator-control unit 47P connector terminal No. 10: There should be continuity. An open or high resistance in the wire A25 (2) RED ABS modulator-control unit 47P connector disconnected Check for continuity between terminal A25 and ABS modulator-control unit 47P connector terminal No. 10: There should be continuity. An open or high resistance in the wire B27 RED EPS control unit connector C (16P) disconnected Check for continuity between terminal B27 and EPS control unit connector terminal C16: There should be continuity. An open or high resistance in the wire Q2 BLU Under all conditions Check for continuity between terminal and data link connector (16P) connector terminal No. 7: There should be continuity. An open or high resistance in the wire Q2 BLU Immobilizer-keyless control unit 7P connector disconnected Check for continuity between terminal Q2 and immobilizer-keyless control unit 7P connector terminal No. 5: There should be continuity. An open or high resistance in the wire Q2 (3) BLU Audio-navigation unit connector A (24P) disconnected Check for continuity between terminal Q2 and audio-navigation unit connector terminal A3: There should be continuity. An open or high resistance in the wire Q2 (4) BLU Audio unit connector A (24P (17P (5) ) disconnected Check for continuity between terminal Q2 and audio unit connector terminal A3 (A6 (5) ): There should be continuity. An open or high resistance in the wire Q2 (6) BLU TPMS control unit 20P connector disconnected Check for continuity between terminal Q2 and TPMS control unit 20P connector Terminal No. 7: There should be continuity. An open or high resistance in the wire Q2 BLU SRS unit connector A (39P) disconnected Check for continuity between terminal 0.2 and SRS unit connector terminal A18: There should be continuity. An open or high resistance in the wire Q3 GRN Immobilizer-keyless control unit 7P connector disconnected Check for continuity between terminal Q3 and immobilizer-keyless control unit 7P connector terminal No. 4: There should be continuity. An open or high resistance in the wire Q3 GRN Gauge control module 32P connector disconnected Check for continuity between terminal Q3 and gauge control module 32P connector terminal No. 17: There should be continuity. An open or high resistance in the wire Q3 GRN Climate control unit 36P connector disconnected Check for continuity between terminal Q3 and climate control unit 36P connector terminal No. 6: There should be continuity. An open or high resistance in the wire Q3 (3) GRN HandsFreeLink control unit 28P connector disconnected Check for continuity between terminal Q3 and-HandsFreeLink control unit 28P connector terminal No. 18: There should be continuity. An open or high resistance in the wire A25 RED Disconnect these connectors: VSA modulator control unit 47P connector (1) ABS modulator control unit 47P connector (2) Check for continuity to ground: There should be no continuity. A short to ground in the wire B27 RED Disconnect EPS control unit connector C(16P) Check for continuity to ground: There should be no continuity. A short to ground in the wire Q2 BLU Disconnect these connectors: Immobilizer-keyless control unit 7P connector TPMS control unit 20P connector (6) Audio-navigation unit connector A (24P) (3) Audio unit connector A (24P) (4) (5) SRS unit connector A (39P) Check for continuity to ground: There should be no continuity. A short to ground in the wire Q3 GRN Disconnect these connectors: Immobilizer-keyless control unit 7P connector Gauge control module 32P connector Climate control unit 36P connector HandsFreeLink control unit 28P connector (3) Check for continuity to ground: There should be no continuity. A short to ground in the wire (1) With VSA (2) Without VSA (3) With navigation (4) Without navigation (5) 2011 DX model (6) With TPMS
6. Reconnect the connectors to the under-dash fuse/relay box, and make these input tests at the connector. 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 7. WIRE SPECIFICATIONS Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained N2 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G501) or an open in the ground wire An open or high resistance in the wire K10 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G502) or an open in the ground wire An open or high resistance in the wire 0.9 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G501) or an open in the ground wire An open or high resistance in the wire M16 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G502) or an open in the ground wire An open or high resistance in the wire N1 PNK Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 1 (15 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire M18 PUR Ignition switch ACC (I) Measure the voltage to ground: There should be battery voltage. Blown No. 14 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire K8 RED Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 20 (15 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire Q8 LT BLU Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 22 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire Q14 RED Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open or high resistance in the wire
7. If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU). USA models (see «REMOVAL AND INSTALLATION»(ref-360306-S00499054042010042800000) ). Canada models (see «CANADA MODELS»(ref-360306-S18238482152010042800000) ). If input failures are related to a particular control unit, replace the control unit.