Multiplex Integrated Control System: Diagnosis Honda Ridgeline I рестайлинг

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 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 and Mode 2 (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-336494-S25849519332009072700000) ).
2. Check for DTCs (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-336494-S25849519332009072700000) ).
3. If multiple DTCs are stored, sort them, and then troubleshoot the DTCs in this order. -1. Battery voltage DTCs -2. Internal error DTCs -3. Loss of communication DTCs NOTE: If DTC B1000 is stored, troubleshoot DTC B1000 (see «DTC B1000: Communication Bus Line Error (BUS-OFF)»(ref-336494-S28764153732009072700000) ) 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 «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-336494-S25849519332009072700000) ).

How to clear the DTC

1. Enter the B-CAN System Diagnosis Test Mode 1 (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. While in Test Mode 1, press and hold down the SELECT/RESET switch button for more than 10 seconds to clear the DTCs.

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 set loss of communication DTCs. Use this chart to find the control unit that is not communicating with 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

BUS OFF AND INTERNAL ERROR CODES CHART

Loss of Communication

LOSS OF COMMUNICATION CONTROL UNIT CHART

DTC Troubleshooting Index

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

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

DTC TROUBLESHOOTING CHART

Examples of a communication circuit test

Normal circuit

1. Ignition switch is turned to ON (II).
2. The door multiplex control unit transmits a door switch message.
3. The multiplex integrated control unit (MICU), relay control module, and gauge control module receive the door lock switch message.
4. The communication circuit test is passed. Since the door lock switch message was received by all the ECUs expecting to receive a message, the communication circuit between those units is OK. There are multiple messages sent and received by each ECU during this time to insure that the communication circuit is intact. Failed circuit
5. Ignition switch is turned to ON (II).
6. The door multiplex control unit transmits a door switch message.
7. The multiplex integrated control unit (MICU), relay control module, and gauge control module expect to receive the door lock switch message, but since there is a break in the communication circuits, it is not received.
8. Each ECU that expects to receive the door lock switch message from the door multiplex control unit will transmit DTCs for the message that it did not receive.

Scheme 3

Since there is a break in the communication circuit, the door lock switch message could not be received by the gauge control module, multiplex integrated control unit (MICU), or the relay control module. Each of these units will set "loss of communication" error codes for the message(s) they did not receive. There may be multiple communication DTCs if the unit that has become disconnected from the network would normally transmit multiple messages during the communication line test. For example, the door multiplex control unit sends the keyless panic message and door lock switch message during the communication circuit test.

Diagnostic Trouble Codes (DTC)

There are three types of DTCs used by the CAN networks.

DIAGNOSTIC TROUBLE CODES REFERENCE CHART

MICU Input Test

Note. Check the No. 22 (120 A), No. 23 (60 A), No. 15 (40 A) fuse in the under-hood fuse/relay box before troubleshooting.

Scheme 4

Scheme 5

1. Before troubleshooting the MICU, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. Turn the ignition switch to LOCK (0).
3. Remove the left front door sill trim and left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(ref-336498-S00856079632009072700000) ).
4. Disconnect the under-dash fuse/relay box connectors D, E, H, J, K, N, P, W and X. NOTE: All connector views are wire side of female terminals.
5. Inspect the connector 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 look OK, Go to step 6.
6. With the connectors still disconnected from the under-dash fuse/relay box, do these input tests at the following connector(s). 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 TEST CONDITION REFERENCE CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained P7 WHT/BLK Under all conditions Attach to ground: The ignition key light should come on. Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box Faulty LED An open in the wire W4 BLU/RED Interior lights switch in the middle position, all doors closed Attach to ground: The individual map lights should come on. Blown No. 6 (10 A) fuse in the under-dash fuse/relay box Faulty map light An open in the wire D11 BLU Under all conditions Check for continuity between terminal D11 and relay control module connector J (10P) terminal No. 8: There should be continuity. An open or high resistance in the wire Relay control module connector J (10P) disconnected Check for continuity to ground: There should be no continuity. A short to ground in the wire J4 BRN/BLK Under all conditions Check for continuity between terminal J4 and power window master switch connector (23P) terminal No. 16: There should be continuity. An open or high resistance in the wire Power window master switch (Door multiplex control unit) connector (23P) disconnected Check for continuity to ground: There should be no continuity. A short to ground in the wire N22 LT BLU Under all conditions Check for continuity between terminal N22 and HVAC control unit connector (30P) terminal No. 11 (or climate control unit connector (30P) terminal No. 30): There should be continuity. An open or high resistance in the wire HVAC control unit (or climate control unit) connector (30P) disconnected Check for continuity to ground: There should be no continuity. A short to ground in the wire N28 BRN/YEL Under all conditions Check for continuity between terminal N28 and gauge control module connector B (14P) terminal No. 6: There should be continuity. An open or high resistance in the wire Gauge control module connector B (14P) disconnected Check for continuity to ground: There should be no continuity. A short to ground in the wire X27 LT GRN Under all conditions Check for continuity between terminal X27 and combination switch connector (12P) terminal No. 3: There should be continuity. An open or high resistance in the wire Combination switch connector (12P) disconnected Check for continuity to ground: There should be no continuity. A short to ground in the wire X18 YEL Under all conditions Check for continuity between terminal X18 and HandsFreeLink control unit connector (28P) terminal No. 18: There should be no continuity. An open or high resistance in the wire HandsFreeLink control unit connector (28P) disconnected Check for continuity to ground: There should be no continuity. A short to ground in the wire
7. Reconnect the connectors to the under-dash fuse/relay box, and do sure these input tests at the following connectors on the under-dash fuse/relay box.

1. If any test indicates a problem, find and correct the cause, then recheck the system.
2. If all the input tests prove OK, the MICU must be faulty, replace the under-dash fuse/relay box assembly (see «REMOVAL AND INSTALLATION»(ref-336491-S16377093952009072700000) ).

WIRE TEST CONDITION REFERENCE CHART

Gauge Control Module Input Test

Note. Check the No. 22 (120 A), No. 23 (60 A), No. 15(40 A) fuse in the under-hood fuse/relay box before testing.

Scheme 6

1. Before troubleshooting the gauge control module, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. Turn the ignition switch to LOCK (0).
3. Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(ref-336474-S10626245912009072700000) ).
4. Disconnect connectors from the gauge control module.
5. Inspect the connector 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 look OK, Go to step 6. NOTE: All connectors are wire side of female terminals.
6. Reconnect connectors A and C to the gauge control module, and do these input tests at the following connector.

1. If any test indicates a problem, find and correct the cause, then recheck the system.
2. If all the input tests prove OK, replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(ref-336474-S10626245912009072700000) ).

WIRE TEST CONDITION REFERENCE CHART

Door Multiplex Control Unit Input Test

Note. Check the No. 22 (120 A), No. 23 (60 A), No. 15 (40 A) fuse in the under-hood fuse/relay box before troubleshooting.

Scheme 7

1. Before troubleshooting the door multiplex control unit, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. Turn the ignition switch to LOCK (0).
3. Remove the power window master switch (see «PASSENGER'S POWER WINDOW MOTOR TEST»(ref-336508-S35518542292009072700000) ).
4. Disconnect the 23P connector from the power window master switch (door multiplex control unit).
5. Inspect the connector 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 look OK, Go to step 6.
6. With the connector still disconnected, do these input tests at the following connector. If the test indicates a problem, find and correct the cause, then recheck the system. If the input tests prove OK, Go to step 7. WIRE TEST CONDITION REFERENCE CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 16 BRN/BLK Under all conditions Check for continuity between terminal No. 16 and under-dash fuse/relay box connector J (21P) terminal No. 4: There should be continuity. An open or high resistance in the wire
7. Reconnect the connector to the door multiplex control unit, and do these input tests at the following connector.

1. If any test indicates a problem, find and correct the cause, then recheck the system.
2. If all the input tests prove OK, the door multiplex control unit must be faulty, replace the power window master switch (see «POWER WINDOW MASTER SWITCH REPLACEMENT»(ref-336508-S12509656322009072700000) ).

WIRE TEST CONDITION REFERENCE CHART

Combination Switch Control Unit Input Test

Note. Check the No. 22 (120 A) No. 23 (60 A), No. 15(40 A) fuse in the under-hood fuse/relay box before testing.

Scheme 8

1. Before troubleshooting the combination switch control unit, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. Turn the ignition switch to LOCK (0).
3. Remove the steering column covers (see «REMOVAL»(ref-371295-S01518293482010090700000) ).
4. Disconnect the 12P connector from the combination switch control unit.
5. Inspect the connector 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 look OK, Go to step 6.
6. Reconnect all the connector to the control unit, and do the following input tests

1. If any test indicates a problem, find and correct the cause, then recheck the system.
2. If all the input tests prove OK, the combination switch control unit must be faulty, replace the combination switch (see «COMBINATION SWITCH REPLACEMENT»(ref-336510-S10331173832009072700000) ).

WIRE TEST CONDITION REFERENCE CHART

Relay Control Module Input Test

Note. Check the No. 22 (120 A), No. 23 (60 A), No. 15 (40 A) fuse in the under-hood fuse/relay box before testing.

Scheme 9

1. Before troubleshooting the multiplex integrated control system, do the B-CAN System Diagnosis Test mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(ref-336494-S14750832832009072700000) ).
2. Turn the ignition switch to LOCK (0).
3. Check the No. 7 (7.5 A) fuse in the under-hood fuse/relay box.
4. Remove the under-hood fuse/relay box under cover (see «REMOVAL AND INSTALLATION»(ref-336492-S05232778502009072700000) ).
5. Disconnect under-hood fuse/relay box connector J (10P).
6. Inspect the connector 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 look OK, Go to step 7.
7. Reconnect the connector to the under-hood fuse/relay box, and do the following input tests

1. If any test indicates a problem, find and correct the cause, then recheck the system.
2. If all the input tests prove OK, the relay control module must be faulty, replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-336492-S05232778502009072700000) ).

WIRE TEST CONDITION REFERENCE CHART