2010 INFINITI QX56 Factory Service Manual

Page 3249 of 4210

INFINITI QX56 2010  Factory Service Manual POWER SUPPLY AND GROUND CIRCUITSCS-17
< COMPONENT DIAGNOSIS >
C
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POWER SUPPLY AND GROUND CIRCUIT
SUSPENSION CONTROL UNIT
SUSPENSION CONTROL UNIT  : Diagnosis ProcedureINF

Page 3250 of 4210

INFINITI QX56 2010  Factory Service Manual SCS-18
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
1.CHECK COMPRESSOR MOTOR RELAY OPRATION
CONSULT-III
1. Disconnect the suspension air compressor connector C9.
2. Turn ignition switch ON.

Page 3251 of 4210

INFINITI QX56 2010  Factory Service Manual POWER SUPPLY AND GROUND CIRCUITSCS-19
< COMPONENT DIAGNOSIS >
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1.POWER SUPPLY CIRCUIT CHECK
1. Disconnect height sensor connector C8.
2. Turn the ignition switch ON. 
3

Page 3252 of 4210

INFINITI QX56 2010  Factory Service Manual SCS-20
< COMPONENT DIAGNOSIS >
COMPRESSOR MOTOR RELAY
COMPRESSOR MOTOR RELAY
DescriptionINFOID:0000000005148178
Receives suspension air compressor ON signal from suspension control unit. When activate

Page 3253 of 4210

INFINITI QX56 2010  Factory Service Manual COMPRESSOR MOTOR RELAYSCS-21
< COMPONENT DIAGNOSIS >
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1. Turn ignition switch OFF.
2. Disconnect suspension control unit connector B3.
3. Check continuity between suspe

Page 3254 of 4210

INFINITI QX56 2010  Factory Service Manual SCS-22
< COMPONENT DIAGNOSIS >
COMPRESSOR MOTOR RELAY
1. Connect compressor motor relay connectors E130 and E131.
2. Disconnect suspension air compressor connector C9.
3. Turn ignition ON.
4. Select "

Page 3255 of 4210

INFINITI QX56 2010  Factory Service Manual HEIGHT SENSOR SIGNAL CIRCUITSCS-23
< COMPONENT DIAGNOSIS >
C
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G H
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M A
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SCS
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HEIGHT SENSOR SIGNAL CIRCUIT
DescriptionINFOID:0000000005148181
Supplies vehicle height input to the suspens

Page 3256 of 4210

INFINITI QX56 2010  Factory Service Manual SCS-24
< COMPONENT DIAGNOSIS >
EXHAUST VALVE SOLENOID CIRCUIT
EXHAUST VALVE SOLENOID CIRCUIT
DescriptionINFOID:0000000005148184
Receives exhaust valve solenoid signal from suspension control unit. Whe