lock ACURA CSX 2006 Service Repair Manual

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Disconnection Reconnection
22-68Battery
Battery Terminal Disconnection and Reconnection
B
A
2.9 5.9 N·m
(0.3 0.6 kgf·m, 2.1 4.4 lbf·ft)
C
Some systems store data in memory that is lost when
the battery is disconnected. Do the following steps
before disconnecting the battery.1. Make sure you have the anti-theft code(s) for the audio and/or the navigation system (if equipped).
2. If you are replacing the audio unit, write down the audio presets (AM and FM), and the XM audio
presets (if equipped), because the audio unit does
not retain the presets after the battery is
disconnected.
3. Make sure the ignition switch is in LOCK (0).
4. Disconnect and isolate the negative cable from the battery.
NOTE: Always disconnect the negative cable from
the battery first.
5. Disconnect the positive cable from the battery. Some systems store data in memory that is lost when
the battery is disconnected. Do the following steps to
restore the systems back to normal operation.
1. Clean the battery terminals.
2. Test the battery (see page 22-67).
3. Reconnect the positive cable (A) to the battery (B) first, then reconnect the negative cable (C) to the
battery.
NOTE: Always connect the positive cable to the
battery first.
4. Apply multipurpose grease to the terminals to prevent corrosion.
5. Enter the anti-theft code(s) for the audio system and/or the navigation system (if equipped).
6. Enter the audio presets (if applicable), and enter the XM audio presets (if equipped).
7. Set the clock (for vehicles without navigation).
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22-7222-72 Ignition Switch
Test
Replacement
B
WHT
BLU
ORN
RED
YEL A
Terminal
Position
II (ON)
I (ACC)
0 (LOCK) RED
(ACC)
WHT
(BAT)
ORN
(IG2)
BLU
(IG1) YEL
(ST)
III (START) A
B
SRS components are located in the area. Review the
SRS component locations (see page 24-11), and
precautions and procedures (see page 24-13) before
doing repairs or serving.
1. Do the battery terminal disconnection procedure (see page 22-68).
2. Remove the driver’s dashboard lower cover (see page 20-102), and the steering column covers
(see page 17-9).
3. Disconnect the 7P connector (A) from the ignition switch (B).
4. Check for continuity between the terminals in each switch position according to the table.
5. If the continuity checks do not agree with the table, replace the ignition switch (see page 22-72).
6. Do the battery terminal reconnection procedure (see page 22-68). SRS components are located in the area. Review the
SRS component locations (see page 24-11), and
precautions and procedures (see page 24-13) before
doing repairs or serving.
1. Do the battery terminal disconnection procedure (see page 22-68).
2. Remove the driver’s dashboard lower cover (see page 20-102), and the steering column covers
(see page 17-9).
3. Disconnect the 7P connector (A) from the ignition switch (B).
4. Remove the two screws and the ignition switch.
5. Install the parts in the reverse order of removal.
6. Do the battery terminal reconnection procedure (see page 22-68).
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Loss of Communication DTC cross-reference chart
BUS OFF and Internal Error CodesDTC type Related Unit MICU Gauge ControlModuleClimate Control
Unit HandsFreeLink
Control Unit Immobilizer-
Keyless Control Unit
Transmitting Control Unit Message Receiving Unit/Loss of Communication DTC
MICU Gauge ControlModuleClimate Control
Unit Immobilizer-
Keyless Control Unit
22-76Multiplex Integrated Control System
General Troubleshooting Information (cont’d)
When an ECU on the CAN circuit is unable to communicate with other ECUs on the CAN circuit, one or more of the
control units will set a loss of communications DTC. Use this chart to find the control unit that is not communicating.
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 B1000 B1150 B1200 B1750 B1900
ECU (CPU) Error B1001
ECU (EEPROM)
Error B1002 B1152 B1202
ECU (Internal)
Error B1792
MICU RM B1188 HLSW B1155
WIPSW B1156 MICU B1157
DOORSW B1159
DRLOCKSW B1160 B1905
Gauge Control
Module VSP/NE B1011 B1205
A/T B1008 B1906
CDS (SRS) B1032 ECT B1206
ECM/PCM ENG B1168 A/T B1169
ABS or VSA
modulator-
control unit ABS or VSA B1170
TPMS Control
unit TPMS B1173
EPS Control unit EPS B1183
SRS SRS B1187
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(#'
) MICUDTC Description DTC typePage
22-77
DTC Troubleshooting Index
NOTE: Check the ECM/PCM for DTCs and troubleshoot ECM/PCM (see page 11-3) or F-CAN loss of communication
errors first, then record all DTCs, and sort them by DTC type using the DTC troubleshooting index, then troubleshoot
the DTC(s) in this order.
 Battery voltage DTCs
 Internal error DTCs
 Loss of communication DTCs (beginning with the lowest number first; for example, if B1008 and B1011 are retrieved, troubleshoot B 1008 first).
 Signal error DTCs
B1000 Communication bus line error (BUS-OFF) Loss of communication(see page 22-102)
B1001 MICU internal error (CPU error) (’06-08 models) Internal error (see page 22-103)
B1002 MICU internal error ( EEPROM error) Internal error (see page 22-103)
B1008 MICU lost communication with gauge control m odule (A/T
message) Loss of
communication(see page 22-104)
B1011 MICU lost communication with gauge control m odule (VSP/NE
message) Loss of
communication(see page 22-104)
B1026 Front passenger’s door lock switch LOCK/UNLOCK signal error Signal error (see page 22-120)
B1032 MICU lost communication with the SRS unit (CDS message) CDS (Collision detection signal) input circuit malfunction (’06-07
models) Signal error (see page 22-105)
B1036 IG1 line input error Signal error (see page 22-105)
B1077 Windshield wiper (As) signal error Signal error (see page 22-224)
B1078 Daytime r unning lights signal error Signal error (see page 22-157)
B1127 Driver’s door key cylinder switch signal error Signal error (see page 22-121)
B1128 Driver’s door lock switch signal error Signal error (see page 22-123)
B1129 Driver’s door lock knob switch signal error Signal error (see page 22-124)
B1275 Combination light switch OFF position circuit malfunction (’07- 09 models) Signal error (see page 22-159)
B1276 Combination light switch parking (SMALL) position circuit malfunction (’07-09 models) Signal error (see page 22-159)
B1278 Headlight switch ON position circuit malfunction (’07-09 models) Signal error (see page 22-159)
B1279 Headlight switch DIMMER position circuit malfunction (’07-09 models) Signal error (see page 22-161)
B1280 Turn signal switch circuit malfunction (’07-09 models) Signal error (see page 22-186)
B1281 Windshield wiper switch MIST position circuit malfunction (’07- 09 models) Signal error (see page 22-226)
B1282 Windshield wiper switch INT position circuit malfunction (’07-09 models) Signal error (see page 22-226)
B1283 Windshield wiper switch LOW position circuit malfunction (’07- 09 models) Signal error (see page 22-226)
B1284 Windshield wiper switch HIGH position circuit malfunction (’07- 09 models) Signal error (see page 22-226)
(cont’d)
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Gauge Control ModuleDTC Description DTC typePage
22-78Multiplex Integrated Control System
DTC Troubleshooting Index (cont’d)
B1150 Communication bus line error (BUS-OFF)
Loss of
communication (see page 22-106)
B1152 Gauge control m odule internal error (EEPROM error) Internal error (see page 22-262)
B1155 Gauge control m odule lost communication with the MICU
(Headlight switch message) Loss of
communication(see page 22-263)
B1156 Gauge control m odule lost communication with the MICU
(Wiper switch message) Loss of
communication(see page 22-263)
B1157 Gauge control m odule lost communication with the MICU
(MICU message) Loss of
communication(see page 22-264)
B1159 Gauge control m odule lost communication with the MICU
(DOORSW message) Loss of
communication(see page 22-263)
B1160 Gauge control m odule lost communication with the MICU
(DRLOCKSW message) Loss of
communication(see page 22-264)
B1168 Gauge control m odule lost communication with the ECM/PCM
(Engine messages) Loss of
communication(see page 22-265)
B1169 Gauge control m odule lost communication with the PCM (A/T
message) Loss of
communication(see page 22-265)
B1170 Gauge control m odule lost communication with ABS/VSA
modulator-control unit (ABS/VSA message) Loss of
communication(see page 22-265)
B1173 Gauge control m odule lost communication with the TPMS
control unit (TMPS message) (’08-09 models) Loss of
communication(see page 22-266)
B1175 Fuel level sensor (Fuel gauge sending unit) circuit open Signal error (see page 22-267)
B1176 Fuel level sensor (Fuel gauge sending unit) circuit short Signal error (see page 22-268)
B1177 Battery voltage a bnormal (’06 model) Battery voltage (see page 22-269)
B1178 F-CAN communication line error Loss of
communication (see page 22-265)
B1183 Gauge control m odule lost communication with EPS control unit
(EPS message) Loss of
communication(see page 22-270)
B1187 Gauge control m odule lost communication with the SRS unit
(SRS message) Loss of
communication(see page 22-265)
B1188 Gauge control m odule lost communication with the MICU (RM
message) Loss of
communication(see page 22-263)
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Climate Control UnitDTC Description DTC typePage
HandsFreeLink Control Unit DTC Description DTC typePage
Immobilizer-Keyless Control Unit DTC Description DTC typePage
22-79
B1200 Communication bus line error (BUS-OFF) Loss of
communication (see page 22-107)
B1202 Climate control unit internal error ( EEPROM error)Internal error (see page 21-28)
B1205 Climate control unit lost communication with the gauge control module (VSP/NE message) Loss of
communication(see page 21-28)
B1206 Climate control unit lost communication with the gauge control module (ECT message) Loss of
communication(see page 21-28)
B1207 Climate control unit lost communication with the gauge control module (ILLUMI message) Loss of
communication(see page 21-28)
B1220 Recirculation control motor circuit short Signal error (see page 21-29)
B1225 In-car temperature sensor circuit open Signal error (see page 21-31)
B1226 In-car temperature sensor circuit short Signal error (see page 21-32)
B1227 Outside air temperature sensor circuit open Signal error (see page 21-33)
B1228 Outside air temperature sensor circuit short Signal error (see page 21-34)
B1229 Sunlight sensor circuit open Signal error (see page 21-35)
B1230 Sunlight sensor circuit short Signal error (see page 21-36)
B1231 Evaporator temperature sensor circuit open Signal error (see page 21-37)
B1232 Evaporator temperature sensor circuit short Signal error (see page 21-39)
B1233 Air mix control motor circuit open Signal error (see page 21-40)
B1234 Air mix control motor circuit short Signal error (see page 21-41)
B1235 Air mix control motor stuck Signal error (see page 21-42)
B1239 Mode control motor circuit open or short Signal error (see page 21-44)
B1240 Mode control motor, linkage, door malfunctionSignal error (see page 21-46)
B1241 Blower motor circuit malfunction Signal error (see page 21-47)
B2983 Recirculation control motor, linkage, door malfunctionSignal error (see page 21-51)
B2986 Recirculation control motor circuit open Signal error (see page 21-52)
B1750 Communication bus line error (BUS-OFF) Loss of
communication (see page 22-107)
B1775 Microphone input/output short to power/open Signal error (see page 23-376)
B1776 Microphone input/output short to ground/open Signal error (see page 23-377)
B1779 HFL switch (HFL talk/HFL back buttons) circuit open/short Signal error (see page 23-379)
B1780 HFL switch (HFL talk/HFL back buttons) circuit short Signal error (see page 23-381)
B1792 HandsFreeLink control unit internal error Internal error (see page 23-382)
B1900 Communication bus line error (BUS-OFF) Loss of
communication (see page 22-108)
B1905 Immobilizer-keyless control unit lost communication with the MICU (DRLOCKSW message) Loss of
communication(see page 22-317)
B1906 Immobilizer-keyless control unit lost communication with the gauge control module (A/T message) Loss of
communication(see page 22-318)
B1925 Ignition key switch signal error Signal error (see page 22-319)
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MICU Control Functions Index
SystemFunction
22-82Multiplex Integrated Control System
System Description (cont’d)
The MICU (built into the under-dash fuse/relay box) is one of the B-CAN components. The MICU controls many
systems related to the body controller area and security system, and also works as a gateway to the diagnose the
other B-CAN connected ECUs with the HDS.
Refer to the each system circuit diagram in detail.
Multiplex Control Sends the switch input signal information to the MICU and outputs the information. The MICU controls the ECUs electric load and communication based upon the information
received the B-CAN.
On-Board Diagnosis The MICU has a gateway function which sends the results of the MICU internal diagnosis and the B-CAN connected ECUs diagnosis to the HDS.
Self-Diagnosis Test mode 1 diagnoses the communication line between the MICU and B-CAN connected unit. Test mode 2 checks the switch inputs connected to the MICU.
Interior Light(s) The MICU controls the interior lights ON, OFF and dimming based upon the information of the related switches and/or the B-CAN related information.
Sleep Function The MICU has a sleep function, which it enters during the power down mode.
The MICU also controls the function of these circuits:  Entry lights control (map lights and ceiling light)
 Exterior lights control (including the daytime running lights control)
Horn
 Interlock system
 Key-in reminder
 Keyless entry
 Lights-on reminder
 Power door locks
 Power window key-off timer
 Seat belt reminder
 Security alarm
 Turn signal/hazard flasher
 Wiper/washer
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Wake-up and Sleep Function
Fail-safe Function
Hardware Fail-safe Control
Software Fail-safe Control
Fail-safe function
22-84Multiplex Integrated Control System
System Description (cont’d)
The multiplex integrated control system has wake-up and sleep functions to decrease parasitic draw on the battery
when the ignition switch in LOCK (0).
 In the sleep mode, the MICU stops functioning (communication and CPU control) when it is not necessary for the system to operate.
 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.
 When the ignition switch is turned to LOCK (0), and the driver’s door is opened, then closed, there is a delay of about 40 seconds before the control unit goes from the wake-up mode to the sleep mode.
 The sleep mode will not function if any door is opened or if a key is in the ignition.
 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 page 22-99).
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.
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.
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Power Supply Voltage Monitoring Function
Entry Lights Control System
Lighting System (Headlights, Parking Lights, Fog Lights, Side Marker Lights, License Plate
Lights, and Taillights)
Daytime Running Lights
Turn Signal/Hazard Warning Lights
Door Lock Response Operation
Power Window Key-off Operation
InputOutput
Input Output
Input Output
Input Output
Input Output
Input Output
Input Output
22-85
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.
MICU Battery voltage MICU : MICU internal circuit
The MICU controls the ceiling light ON/OFF and dimming based upon input signals from each switch. MICU IG1 power supply Ignition key switch
Driver’s door switch
Front passenger’s door switch
Left rear door switch
Right rear door switch
Driver’s door lock knob switch (LOCK) Interior light
B-CAN Keyless LOCK signal
The MICU contains the relay circuits for the headlight high/low beams and taillights, and controls the lighting system ON/OFF based upon input
signals from the combination light switch. MICU Headlight OFF switch Headlight ON switch
Fog light switch
Dimmer switch
Combination light switch (parking lights, side marker lights,
license plate lights, and taillights)
Passing switch Headlights (low beam)
Headlights (high beam)
Parking lights
Fog lights
Side marker lights
License plate lights
Taillights
The MICU controls the exterior lights as a daytime running lights based upon input signals from each switch. MICU Headlight OFF switch Headlight ON switch
Dimmer switch
Combination light switch (parking lights, side marker lights,
license plate lights, and taillights)
Passing switch Headlights (low beam)
Headlights (high beam)
Parking lights
Slide marker lights
License plate lights
Taillights
B-CAN Transmission range switch (P position)
The MICU controls the turn signal/hazard warning lights based upon input signals from the turn signal and hazard warning switches. MICU IG1 power supply Turn signal switch (left/right)
Hazard warning switch Turn signal lights (left/right)
The MICU controls the door lock actuators based upon B-CAN signals. B-CAN Door lock signals Door lock actuator (LOCK/UNLOCK) Driver’s door lock actuator (UNLOCK)
Trunk lid release actuator
The MICU controls the power windows key-off operation based upon input signals from each switch. MICU IG1 power supply Ignition key switch
Driver’s door switch
Front passenger’s door switch Power window key-off timer
(cont’d)
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Power Door Locks (Vehicle Speed Sense)
Power Door Locks (Normally LOCK/UNLOCK Operation)
Keyless Entry System
Keyless PANIC
InputOutput
Input Output
Input Output
Input Output
22-86Multiplex Integrated Control System
System Description (cont’d)
The MICU controls the door lock actuators based upon B-CAN signals and input signals from each switch.
MICU IG1 power supply Driver’s door switch
Front passenger’s door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch
Driver’s door lock knob switch (UNLOCK)
Front passenger’s door lock knob switch (UNLOCK)
Left rear door lock knob switch (UNLOCK)
Right rear door lock knob switch (UNLOCK)
Transmission range switch (P position) Door lock (LOCK)
B-CAN Vehicle speed pulse Engine RPM
The MICU controls the door lock actuators based upon input signals from each switch. MICU IG1 power supply Ignition key switch
Driver’s door switch
Front passenger’s door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch
Driver’s door lock knob switch (LOCK)
Driver’s door lock switch (LOCK/UNLOCK)
Driver’s door key cylinder switch (UNLOCK)
Front passenger’s door lock switch (LOCK/UNLOCK) Door lock actuators (LOCK/UNLOCK)
The MICU controls the door lock actuators based upon B-CAN signals and input signals from each switch. MICU IG1 power supply Ignition key switch
Driver’s door switch
Front passenger’s door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch
Driver’s door lock knob switch (LOCK/UNLOCK)
Driver’s door lock switch (LOCK/UNLOCK)
Driver’s door key cylinder switch (UNLOCK)
Front passenger’s door lock switch (LOCK/UNLOCK)
Transmission range switch (P position) Door lock actuator (LOCK/UNLOCK)
Driver’s door lock actuator (UNLOCK)
Trunk lid release actuator
B-CAN Keyless LOCK signal
The MICU controls the keyless PANIC based upon B-CAN signals. B-CAN Keyless PANIC signal (action, headlight low, parking light and horn) Headlights (low beam)
Parking lights
Side marker lights
License plate lights
Taillights
Horn
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