Multiplex Intergrated Control System: Diagnosis Honda CR-V II рестайлинг

Troubleshooting

Special Tools Required

MPCS service connector 07WAZ-001010A

Scheme 4

Scheme 5

1. Remove the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTAL»(ref-219396-S35205952782006021400000) ).
2. Check the No. 9 (10 A) fuse in the under-hood fuse/ relay box and the No. 10 (7.5 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 3. NO - Find and repair the cause of the blown fuse.
3. Turn the ignition switch ON (II). If the driver's seat belt is unbuckled, the seat belt reminder will chime 6 times.
4. Set the ceiling light to the center position and close all the doors.
5. Connect the special tool (A) to the multiplex control inspection connector (B).
6. After about 5 seconds, the front ceiling light should come on for 2 seconds, go out, then blink on for 0.2 second to show the system is now in Mode 1. MODE 1: Did the front ceiling light indicate Mode 1 ? YES - Go to step 8 . NO - Go to step 7.
7. Check for continuity between No. 4 terminal of the under-dash fuse/relay box connector J and body ground. Is there continuity? YES - Replace the under-dash fuse/relay box. NO - Repair the open in the wire. If the wire is OK, repair G301.
8. If there are any DTCs present, the front ceiling light will blink to indicate the DTC(s). If more than one DTC is present, the DTCs will be displayed in ascending order. If there are no DTCs, the front ceiling light will not blink again after the Mode 1 indication. Are there any DTCs? YES - Go to step 9. NO - Go to the Mode 2 test (see «MODE 2 TEST»(ref-219431-S12696467302006021400000) ).
9. Troubleshoot the DTC(s) in the order indicated using the following charts. If a faulty control unit is suspected, substitute it with a known good part and recheck for DTCs. If the DTC(s) is still present, go to the next step listed for the DTC. If the DTC(s) is no longer present replace the original part. Individual DTCs INDIVIDUAL DTCS TROUBLESHOOTING Multiplex DTC Probable Cause 1 The multiplex control unit cannot receive signals from the gauge assembly. Faulty power or ground to the gauge assembly Faulty gauge assembly Faulty under-dash fuse/relay box 2 The multiplex control unit cannot receive signals from the ECM/PCM (1) Faulty power or ground to the ECM/PCM (1) Faulty ECM/PCM (1) Faulty under-dash fuse/relay box 3 Internal failure of the multiplex control unit Faulty under-dash fuse/relay box 5 The gauge assembly cannot receive signals from the multiplex control unit and the ECM/PCM (1) Faulty power or ground to the gauge assembly Faulty gauge assembly 6 The ECM/PCM (1) cannot receive signals from the multiplex control unit and the gauge assembly Faulty power or ground to the ECM/PCM (1) Faulty ECM/PCM (1) (1) Before replacing a faulty ECM/PCM, make sure it has the latest software revision. Update if necessary before swapping or replacing. Multiple DTCs MULTIPLE DTCS TROUBLESHOOTING Multiplex DTC Probable Cause 1,2,3 and ECM/PCM DTC P0600 Simultaneously Short to ground on one of the communication wires Short to ground on the YEL wire between the ECM/PCM terminal E13 and the under-dash fuse/relay box terminal E10 Short to ground on the GRY/RED wire between the gauge assembly terminal A1 and under-dash fuse/ relay box terminal K10 Short to ground on the BLU/ORN wire between the keyless receiver unit terminal No. 2 and the under-dash fuse/relay box terminal K2. 1 and 6 Simultaneously Open in the communication wire Open in GRY/RED wire between the under-dash fuse/relay box terminal K10 and the gauge assembly terminal A1 2 and 5 Simultaneously Open in the communication wire Open in the YEL wire between the under-dash fuse/relay box terminal E10 and ECM/PCM terminal E13

Scheme 6

1. From Mode 1, disconnect the special tool from the multiplex control inspection connector for 5 to 10 seconds, and then reconnect it.
2. The front ceiling light should come on for 2 seconds, go out, then blink twice, 0.2 second each time. The system is now in Mode 2. MODE 2
3. Operate the switches listed below: If the circuit is OK, the front ceiling light will blink once. If the circuit is faulty, the lights will not blink. Tip: Operating the switches most closely related to the problem you are diagnosing is a quick way of testing the circuits integrity. SWITCHES OPERATION Switch Lights blinks when: Windshield washer switch Washer switch pulled Windshield wiper switch Switch in the INT position Driver's door switch Driver's door opened Front passenger's door switch One of passenger's door opened Left rear door switch One of passenger's door opened Right rear door switch One of passenger's door opened Tailgate switch Tailgate opened Parking brake switch Parking brake applied Door lock switch Pushed to lock and unlock Driver's door lock knob switch Knob in unlock or lock position A/C switch A/C switch ON and blower switch ON Headlight switch Switched to the PARK position Brake pedal position switch Brake pedal pressed Transmission range switch Shift from P through R, D, 2,1 Hatch glass switch Hatch opened
4. If all inputs were confirmed, or multiple circuits failed at the same time in Mode 2, go to the «MULTIPLEX SLEEP MODE TEST»(ref-219431-S04603564692006021400000) , If a singe switch fails in Mode 2, troubleshoot its circuit.

Multiplex Sleep Mode Test

1. Connect the positive lead of a voltmeter to No. 10 terminal of the under-dash fuse/relay box connector E (YEL) or K (GRY/RED) and the negative lead to body ground.
2. Connect an ammeter between the negative battery cable and the negative battery post.
3. Remove the special tool from the multiplex control inspection connector.
4. Close the doors, the hatch, turn the headlights off, turn off the ignition switch and remove the key.
5. Within 1 minute, the voltage on the communication wire (E10 or K10) should change from about 4-10 V to battery voltage and the amperage at the negative battery terminal should drop from about 70-80 mA to less than 10 mA.
6. Record your findings and go to the «MULTIPLEX WAKE-UP TEST»(ref-219431-S25536797912006021400000) .

Multiplex Wake-up Test

1. From the sleep mode, wake-up the multiplex system by performing one of the following operations: MULTIPLEX WAKE-UP OPERATION Operation Method used for wake up Turn the ignition switch ON (II) All multiplex units wake up simultaneously (regardless of ability to communicate) Turn combination light switch to parking light position Multiplex control unit wakes up the other units via communication lines. Open the driver's door Multiplex control unit wakes up the other units via communication lines.
2. As the system shifts to its active (wake-up) mode, communication wire voltage will return to 4-10 V and the battery terminal current will return to 70-80 mA.
3. If the system does not go into sleep mode or wake-up properly, perform the Multiplex Control Unit Input Test (see «MULTIPLEX CONTROL UNIT INPUT TEST»(ref-219431-S03695060362006021400000) ).

Note. If multiple circuits fail to respond in the mode 2 tests and/or the multiplex circuit fails to go into sleep mode or wake-up, it may mean that a control unit failed without triggering a DTC in mode 1. Perform the Multiplex Control Unit Input Test (see MULTIPLEX CONTROL UNIT INPUT TEST ). If the input test confirms that all the inputs are working properly, substitute a known-good multiplex control unit, gauge assembly, the keyless receiver unit, or ECM/PCM one at a time. If the system works properly after swapping one of the components, replace the original component, it is faulty.

Scheme 7

1. Remove the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTAL»(ref-219396-S35205952782006021400000) ).
2. Disconnect the under-dash fuse/relay box connectors C, E, F, J, K, 0, P, Q, X and Y. NOTE: All connectors are wire side of female terminals.
3. 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 4.
4. Reconnect the connectors to the under-dash fuse/relay box, and make sure these input tests at the appropriate connectors on the under-dash fuse/relay box. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the multiplex control unit must be faulty, replace the under-dash fuse/relay box assembly. MULTIPLEX CONTROL UNIT INPUT TEST Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained J4 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. Poor ground (G301) An open in the wire Y6 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. Poor ground (G502) An open in the wire J2 WHT/RED Under all conditions Check for voltage to ground: There should be battery voltage. Blown No. 9 (10A) fuse in the under-hood fuse/relay box An open in the wire Q3 GRN Driver's door open Check for voltage to ground: There should be less than 1 V. Faulty driver's door switch An open in the wire Driver's door closed Check for voltage to ground: There should be 5 V or more. Faulty driver's door switch Short to ground Q4 LT GRN/RED Passenger's door open Check for voltage to ground: There should be less than 1 V. Faulty passenger's door switch An open in the wire Passenger's door closed Check for voltage to ground: There should be 5 V or more. Faulty passenger's door switch Short to ground Q2 GRN/WHT Hatch glass open Check for voltage to ground: There should be less than 1 V. Poor ground (G601, G701) Faulty hatch glass latch switch An open in the wire Hatch glass closed Check for voltage to ground: There should be 5 V or more. Faulty hatch glass latch switch Short to ground Q8 * C8 * F1 GRN/ORN * GRN/ORN * GRN Parking brake lever pulled Check for voltage to ground: There should be less than 1 V. Faulty parking brake switch An open in the wire Parking brake lever released Check for voltage to ground: There should be 5 V or more. Faulty parking brake switch Short to ground Q5 BLU/RED Ignition switch ON (II), driver's seat belt is unbuckled. Check for voltage to ground: There should be less than 1 V. Faulty driver's seat belt buckle switch Poor ground (G551) An open in the wire Ignition switch ON (II), driver's seat belt is buckled. Check for voltage to ground: There should be 5 V or more. Faulty driver's seat belt buckle switch Short to ground P18 RED Tailgate open Check for voltage to ground: There should be less than 1 V. Faulty tailgate switch An open in the wire Tailgate closed Check for voltage to ground: There should be 5 V or more. Faulty tailgate switch Short to ground X5 RED/WHT Ignition key is in the ignition switch Check for voltage to ground: There should be less than 1 V. Faulty ignition key switch Poor ground (G401) An open in the wire Ignition key is out of the ignition switch Check for voltage to ground: There should be 5 V or more. Faulty ignition key switch Short to ground X8 WHT/BLK Under all conditions Attach to ground: The ignition key light should come on. Blown No. 3 (15A) fuse in the under-hood fuse/relay box Blown LED An open in the wire 07 GRN/RED Ceiling light switch in the middle position, all doors closed Attach to ground: The ceiling light should come on. Blown No. 3 (15A) fuse in the under-hood fuse/relay box Faulty ceiling light An open in the wire C11 BLU Under all conditions Attach to ground: Dash lights should come on. Blown No. 6 (15A) fuse in the under-hood fuse/relay box Faulty taillight relay An open in the wire F8 GRN Disconnect the brake fluid level switch 2P connector, and jump the GRN and BLK wires Check for voltage to ground: There should be less than 1 V. Faulty brake fluid level switch An open in the wire Brake fluid level switch connector disconnected, jumper wire removed Check for voltage to ground: There should be 5 V or more. Faulty brake fluid level switch Short to ground E10 YEL All doors, tailgate and hatch glass closed, ignition key removed Check for voltage to ground: There should be battery voltage in the sleep mode and 3-7 V when awake. An open or short in the wire K10 GRY/RED All doors, tailgate and hatch glass closed, ignition key removed Check for voltage to ground: There should be battery voltage in the sleep mode and 3-7 V when awake. An open or short in the wire K2 BLU/ORN Y1 BRN/YEL Under all conditions Check for continuity between the Y1 terminal and the No. 13 terminal of the VSA modulator-control unit: There should be continuity An open in the wire F9 BLU/WHT Under all conditions Check for voltage to ground: There should be 5 V or more. An open or short in the wire