WM_07.pdf

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HEATER, VENTILATION &
AIR CONDITIONING (HVAC)
07
ON-BOARD DIAGNOSTIC. . . . 07-02
SYMPTOM
TROUBLESHOOTING . . . . . 07-03
REFRIGERANT SYSTEM . . . . 07-10
BASIC SYSTEM . . . . . . . . . . . . 07-11
CONTROL SYSTEM . . . . . . . . . 07-40
TECHNICAL DATA . . . . . . . . . . 07-50
SERVICE TOOLS . . . . . . . . . . . 07-60
07–02 ON-BOARD DIAGNOSTIC
HVAC SYSTEM WIRING DIAGRAM . . . . 07–02–2
DTC INSPECTION. . . . . . . . . . . . . . . . . . 07–02–3
DTC B1004, B2449, B2450 . . . . . . . . . . . 07–02–5
DTC B1005, B1006, B2451, B2452 . . . . 07–02–5
DTC B1008, B2453, B2454, B2455 . . . . 07–02–6
DTC B1251, B1253 . . . . . . . . . . . . . . . . . 07–02–6
DTC B1251, B1253, B1255, B1257, B1274, B1275,
B1282, B1283, B1947, B2014 (MULTIPLE DTCS
INDICATED). . . . . . . . . . . . . . . . . . . . . . 07–02–7
DTC B1255, B1257 . . . . . . . . . . . . . . . . . 07–02–8
DTC B1260, B1261 . . . . . . . . . . . . . . . . . 07–02–9
DTC B1260, B1261, B1274, B1275, B1282, B1283
(MULTIPLE DTCS INDICATED) . . . . . . . 07–02–9
DTC B1274, B1275. . . . . . . . . . . . . . . . . . 07–02–10
DTC B1282, B1283. . . . . . . . . . . . . . . . . . 07–02–11
DTC B1317 . . . . . . . . . . . . . . . . . . . . . . . . 07–02–12
DTC B1318 . . . . . . . . . . . . . . . . . . . . . . . . 07–02–12
DTC B1342, B2207, B2463, B2464, B2465, B2466,
B2467, B2537, B2538, B2547 . . . . . . . . 07–02–13
DTC B1947, B2014. . . . . . . . . . . . . . . . . . 07–02–14
DTC B2456, B2457, B2458, B2459, B2460, B2461,
B2462 . . . . . . . . . . . . . . . . . . . . . . . . . . . 07–02–14
DTC B2832 . . . . . . . . . . . . . . . . . . . . . . . . 07–02–15
DTC B2834 . . . . . . . . . . . . . . . . . . . . . . . . 07–02–15
End of Toc
07
07–02–1
SECTION
To c o f S C T
To c o f S C T
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ON-BOARD DIAGNOSTIC
HVAC SYSTEM WIRING DIAGRAM
DPE070200000W14
IG2 B+
13
14
K H
PCM
A
W
X
5
BCM
5 V
5 V
6
B
P
L
2
E
C
M
7
R
T
J
3
G
I
M
8
N
1
B A
U
O
Q
9
A
CPU
M
M
S
10
4
5 V
F
M
11
15
A
D
12
B
V
16
DPE740ZT1101
.
1 Ambient temperature sensor
2 Cabin temperature sensor
3 Evaporator temperature sensor
4 Solar radiation sensor
5 Magnetic clutch
6 Refrigerant pressure switch
7 Air mix actuator
8 Airflow mode actuator
9 Air intake actuator
10 Blower motor
11 Blower relay
12 Power MOS FET
13 Climate control unit
14 A/C relay
15 TNS relay
16 Each switch
End Of Sie
07–02–2
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ON-BOARD DIAGNOSTIC
DTC INSPECTION
DPE070200000W01
1. Connect the WDS or equivalent to the DLC-2.
2. Shine a 60 W incandescent light from a distance
of approx. 100 mm {3.9 in} directly onto the solar
radiation sensor.
Note
• If incandescent light is not shone on the
solar radiation sensor, the climate control
unit determines a malfunction and indicates
DTC “B1260, B1261”.
DLC-2
3. Verify if any DTCs are displayed.
• If any DTCs are displayed, perform
troubleshooting according to the
corresponding DTC inspection.
4. After completion of repairs, clear all DTCs from memory. (See 07–02–3 After Repair Procedure.)
DPE102ZW2001
After Repair Procedure
1. Connect the WDS or equivalent to the DLC-2.
2. Using the WDS or equivalent, clear DTCs from
the PCM memory.
3. Turn the ignition switch off.
4. Perform the DTC inspection again and verify that
no DTCs are displayed.
DLC-2
DPE102ZW2001
DTC Table
DTC
System malfunction location
B1251
Cabin temperature sensor (Open circuit)
B1253
Cabin temperature sensor (GND short)
B1255
Ambient temperature sensor (Open short)
B1257
Ambient temperature sensor (GND short)
B1260
Solar radiation sensor (Battery short)
B1261
Solar radiation sensor (GND short)
B1274
Airflow mode actuator (potentiometer) (Battery short)
B1275
Airflow mode actuator (potentiometer) (GND short)
07
B1282
Air mix actuator (potentiometer) (Battery short)
B1283
Air mix actuator (potentiometer) (GND short)
B1947
Evaporator temperature sensor (GND short)
B2014
Evaporator temperature sensor (Open circuit)
B2832
Airflow mode actuator (motor lock)
B2834
Air mix actuator (motor lock)
U0140
CAN communication system (Reception error in signal from BCM)
U0155
CAN communication system (Reception error in signal from (ICM) (MEC))
U0516
CAN communication system (BUS OFF error)
DTC Table (Water Heater System)
DTC
System malfunction location
B1004
Glow plug malfunction: short to battery or transistor failure
B1005
Fuel pump malfunction: short to battery or transistor failure
B1006
Fuel level to low to start the heater
B1007
Coolant pump malfunction: short to battery or transistor failure
B1008
Blower fan malfunction: short to battery
07–02–3
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ON-BOARD DIAGNOSTIC
DTC
System malfunction location
B1317
Input voltage high
B1318
Input voltage low
B1342
Malfunction in water heater unit
B2207
ECU ROM checksum error
B2449
Glow plug circuit short to ground
B2450
Glow plug circuit open
B2451
Fuel pump circuit short to ground
B2452
Fuel pump circuit open
B2453
Blower fan circuit short to ground
B2454
Blower fan circuit open
B2455
Blower fan out of range (electromotive force not present)
B2456
Coolant sensor short
B2457
Coolant sensor interrupted
B2458
Overheat sensor short
B2459
Overheat sensor interrupted
B2460
Flame sensor short
B2461
Flame sensor interrupted
B2462
Flame off from max. power
B2463
Overheat
B2464
Start time exceeded
B2465
Start counter overrun/system locked
B2466
Overheat counter overrun/system locked
B2467
Aux. heater cool down time exceeded
B2468
Coolant pump short to ground
B2469
Coolant pump interrupted
* : If a DTC not listed above is detected, there is a water heater malfunction, and the water heater must be
replaced.
PID/DATA Monitor and Record
PID Name (Definition)
Unit/
Condition
Condition/Specification (Reference)
Action
Water Heater
Unit terminal
CCNTFFH
(Continuous Codes)
–
• DTC is detected: 1—255
• DTC is not detected: 0
Perform inspection using
appropriate DTC.
–
VOLT_MDL
(Control Module Voltage)
V
• Ignition switch ON: B+
Inspect water heater unit
power supply terminal.
A
HEATER
(Heater Status)
Inactive/
Active
• Water heater unit is not operating:
Inactive
• Water heater unit is operating: Active
–
–
FAN
(Fan Control)
On/Off
• Blower fan is not operating: 0%
• Blower fan is operating: 0—100%
–
–
GLOW
(Glow plug)
On/Off
• Water heater unit is not operating: Off
• Water heater unit is operating: On
–
–
FUEL_PMP
(Fuel pump)
On/Off
• Water heater unit is not operating: Off
• Water heater unit is operating: On
–
–
Simulation Test Item Table
Item
Operating part
Condition
Operation
MIX_ACT
Air mix actuator
Operate the ON/OFF and verify the operation sound.
On/Off
REC/FRESH
REC/FRESH switch
Operate the ON/OFF and verify the operation sound.
On/Off
DISPLAY
Information display
Verify that it is displayed correctly.
On/Off
BLOWER
Blower motor
Operate the ON/OFF and verify the operation sound.
On/Off
MODE_ACT
Airflow mode actuator
Operate the ON/OFF and verify the operation sound.
On/Off
Start Heater
Note
• If the heater is operated for the specified period of time, it stops automatically. After that, the floor fan
07–02–4
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ON-BOARD DIAGNOSTIC
operates for several minutes.
1. Verify that the engine coolant temperature is low.
2. Start the engine.
3. Connect the WDS or equivalent to the DLC-2.
4. Select “Electrical” from the menu.
5. Select “Supplemental Heater”.
6. Select “FFH”.
7. Select “FFH Start Heater Utility” and perform
procedure according to the directions on the WDS
or equivalent screen.
End Of Sie
DLC-2
DPE702ZW1103
DTC B1004, B2449, B2450
DPE070200000W18
B1004 Glow plug malfunction: short to battery or transistor failure
B2449 Glow plug circuit short to ground
B2450 Glow plug circuit open
DETECTION
CONDITION
• CPU detects malfunction in glow plug circuit
POSSIBLE
CAUSE
• Water heater unit malfunction
Diagnostic procedure
STEP
INSPECTION
ACTION
1
INSPECT WATER HEATER UNIT
• Replace the water heater unit. (See 07–40–34
WATER HEATER UNIT REMOVAL/
INSTALLATION [MZR-CD (RF Turbo)].)
• Perform the Combustion Test.
• Are any DTCs present?
Yes Go to the applicable DTC troubleshooting.
No Troubleshooting completed.
End Of Sie
DTC B1005, B1006, B2451, B2452
DPE070200000W22
B1005 Fuel pump malfunction: short to battery or transistor failure
B1006 Fuel level to low to start the heater
B2451 Fuel pump (water heater system) circuit short to ground
B2452 Fuel pump (water heater system) circuit open
DETECTION
CONDITION
• CPU detects malfunction in fuel pump (water heater system) circuit
07
POSSIBLE
CAUSE
• Fuel pump (water heater system) malfunction
• Water heater unit malfunction
• Short to ground between water heater unit terminal B and fuel pump (water heater system) terminal A
• Open circuit between water heater unit terminal B and fuel pump (water heater system) terminal A
• Open circuit between fuel pump (water heater system) terminal B and GND
• Battery malfunction
WATER HEATER UNIT CONNECTOR
FUEL PUMP (WATER HEATER
SYSTEM) CONNECTOR
E
C
A
F
D
B
B
A
07–02–5
DTC
DTC
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