ECU INFINITI M35 2006 Factory Service Manual

WT-26
TROUBLE DIAGNOSES
Revision: 2006 January2006 M35/M45
How to Perform Trouble Diagnosis for Quick and Accurate RepairNES000K7
INTRODUCTION
Before troubleshooting, verify customer complaints.
If a vehicle malfunction is difficult to reproduce, harnesses, harness connectors or terminals may be mal-
functioning. Hold and shake these parts to make sure they are securely connected.
When using a circuit tester to measure voltage or resistance of each circuit, be careful not to damage or
deform connector terminals.
WORK FLOW
Preliminary check:WT-27Self-diagnosis:WT-22Trouble diagnosis for symptoms:WT-35
SEIA0100E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
WT-31
C
D
F
G
H
I
J
K
L
MA
B
WT
Revision: 2006 January2006 M35/M45
Inspection 2: Receiver Data ErrorNES000KB
MALFUNCTION CODE NO. 25, 26, 27, 28
1. CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT AND RECEIVER CONNECTOR
1. Turn ignition switch OFF, disconnect low tire pressure warning control unit harness connector and receiver
harness connector, and check terminal for deformation, disconnection, looseness, and so on. If there is a
malfunction, repair or replace the terminal.
2. Reconnect connector securely, and perform self-diagnosis.
Does
“SELF-DIAG RESULTS” display as normal without any warning lamp?
YES >> Connector terminal connection is loose, damaged, open, or shorted.
NO >> GO TO 2.
2. CHECK TIRE PRESSURE RECEIVER POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, and disconnect tire pressure receiver harness connector E74, E75, B115, B116.
2. Check continuity between tire pressure receiver harness con-
nector E74, E75, B115, B116 and ground.
3. Turn ignition switch ON, and then check voltage between tire
pressure receiver harness connector E74, E75, B115, B116 and
ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHANGE THE TIRE PRESSURE RECEIVER POSITION (EXAMPLE OF FRONT LH SIDE)
1. Replace right from left for front and rear receivers.
2. Perform self-diagnosis.
Is the initial indication of self-diagnosis displayed?
YES >> GO TO 4
NO >> Replace tire pressure receiver front RH when indicating RH tire pressure receiver malfunction. Terminal 4 – Ground : Continuity exist.
SGIA1249E
1 – Ground : Battery voltage (Approx.12 V)
SGIA1250E

WT-34
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 January2006 M35/M45
2. REPLACE TIRE PRESSURE TRANSMITTER
1. Check low tire pressure warning condition again, and replace malfunctioning tire pressure transmitter.
2. Perform ID registration of all transmitter.
Can ID registration of all tire pressure transmitters be completed?
YES >> GO TO 3.
NO >> GO TO the inspection 1. Refer to WT-30, "
Inspection 1: Transmitter no Data" .
3. VEHICLE DRIVING
Drive at a speed of 40 km/h (25 MPH) or more for 3 minutes, and then drive the vehicle at any speed for 10
minutes. Then check all tire pressures with CONSULT-II “DATA MONITOR” within 5 minutes.
Does
“DATA MONITOR” display tire pressure as normal without any warning lamp?
YES >> INSPECTION END
NO >> Replace malfunctioning transmitter, and perform “Step 3” again.
Inspection 7: Vehicle Speed SignalNES000KG
MALFUNCTION CODE NO. 52
1. CHECK SELF-DIAGNOSIS RESULTS
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)” “AIR PRESSURE MONITOR”.
–If “AIR PRESSURE MONITOR” is not displayed, print the “SELECT SYSTEM” screen. Then refer to LAN-
7, "Precautions When Using CONSULT-II" .
NOTE:
Just after starting engine, or turning ignition switch ON, it may not be displayed even if “START (NISSAN
BASED VHCL)” is touched. In this case, reconnect CONSULT-II and CONSULT-II CONVERTER.
5. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
6. Check display contents in self-diagnostic results.
Is
“CAN COMM CIRCUIT” displayed in the self-diagnosis display items?
YES >> Malfunction in CAN communication system. GO TO LAN-7, "Precautions When Using CONSULT-
II" .
NO >> No malfunction. Check combination meter refer to DI-18, "
Trouble Diagnosis" .
Inspection 8: CAN Communication System MalfunctionNES000KS
1. CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect low tire pressure warning control unit harness connector, and check
terminal for deformation, disconnection, looseness, etc.
2. Reconnect harness connector securely, and perform CONSULT-II self-diagnosis.
Is above displayed on self-diagnosis display?
YES >> If “CAN COMM CIRCUIT [U1000]” is displayed, print out self-diagnosis. And then, go to LAN-7,
"Precautions When Using CONSULT-II" .
NO >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
Self-diagnostic results
CAN COMM CIRCUIT [U1000]