Page 1680 of 3383
DTC P0850 PNP SWITCHEC-469
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Revision: November 2009 2006 QX56
5. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 102 and combination meter terminal 40. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Harness for open or short between ECM and combination meter
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1. Disconnect TCM harness connector.
2. Check harness continuity between TCM terminal 8 and A/T assembly terminal 9. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 9.
NG >> Repair or replace.
9. REPLACE COMBINATION METER
Refer to DI-5, "
COMBINATION METERS" .
>> INSPECTION END
Continuity should exist.
Continuity should exist.
Page 1687 of 3383
EC-476Revision: November 2009
DTC P1217 ENGINE OVER TEMPERATURE
2006 QX56
Wiring DiagramUBS00H8X
BBWA2102E
Page 1691 of 3383
EC-480Revision: November 2009
DTC P1217 ENGINE OVER TEMPERATURE
2006 QX56
8. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-481, "
Main 12 Causes of Overheating" .
>> INSPECTION END
PROCEDURE A
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E120.
3. Check voltage between IPDM E/R terminal 22 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
40A fusible link
Harness for open or short between IPDM E/R and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN OR SHORT
1. Disconnect cooling fan motor harness connector.
2. Check harness continuity between cooling fan motor terminal 1 and IPDM E/R terminal 24, cooling fan motor terminal 2 and
ground.
Refer to wiring diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK COOLING FAN MOTOR
Refer to EC-482, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace cooling fan motor. Voltage: Battery voltage
PBIB2067E
Continuity should exist.
BBIA0446E
Page 1700 of 3383
DTC P1564 ICC STEERING SWITCHEC-489
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Revision: November 2009 2006 QX56
Wiring DiagramUBS00L1Q
BBWA2127E
Page 1703 of 3383
EC-492Revision: November 2009
DTC P1564 ICC STEERING SWITCH
2006 QX56
3. CHECK ICC STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect combination switch harness connector.
4. Check harness continuity between combination switch terminal 15 and ECM terminal 67. Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Harness connectors E5, F14
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK ICC STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 99 and combination switch terminal 14. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK ICC STEERING SWITCH
Refer to EC-493, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace ICC steering switch. Continuity should exist.
Continuity should exist.
Page 1707 of 3383
EC-496Revision: November 2009
DTC P1564 ASCD STEERING SWITCH
2006 QX56
Wiring DiagramUBS00L10
BBWA2104E
Page 1709 of 3383
EC-498Revision: November 2009
DTC P1564 ASCD STEERING SWITCH
2006 QX56
2. CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON.
2. Select “MAIN SW”, “CANCEL SW ”, RESUME/ACC SW ” and “SET SW ” in “DATA MONITOR ” mode with
CONSULT-II.
3. Check each item indication under the following conditions.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 99 and ground with press- ing each button.
OK or NG
OK >> GO TO 8.
NG >> GO TO 3.
3. CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect combination switch harness connector M102.
3. Disconnect ECM harness connector.
4. Check harness continuity between combination switch terminal 15 and ECM terminal 67.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
Switch Monitor item Condition Indication
MAIN switch MAIN SWPressed ON
Released OFF
CANCEL switch CANCEL SWPressed ON
Released OFF
RESUME/ACCELERATE
switch RESUME/ACC SWPressed ON
Released OFF
SET/COAST switch SET SW Pressed ON
Released OFF
SEC006D
Switch Condition Voltage [V]
MAIN switch Pressed
Approx. 0
Released Approx. 4
CANCEL switch Pressed
Approx. 1
Released Approx. 4
RESUME/ACCELERATE
switch Pressed Approx.
3
Released Approx. 4
SET/COAST switch Pressed
Approx. 2
Released Approx. 4
PBIB0311E
Continuity should exist.
BBIA0362E
Page 1710 of 3383
DTC P1564 ASCD STEERING SWITCHEC-499
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4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Harness connectors E5, F14
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 99 and combination switch terminal 14. Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Combination switch (spiral cable)
Harness for open and short between ECM and combination switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK ASCD STEERING SWITCH
Refer to EC-500, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace ASCD steering switch. Refer to AV- 5 9 , "
STEERING WHEEL AUDIO CONTROL
SWITCHES" .
8. CHECK INTERMITTENT INCIDENT
Refer to EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.
