Infiniti QX56 (JA60). Manual — part 934
TM-38
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (TCM)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES
>> GO TO 2.
NO
>> GO TO
.
2.
JUDGMENT PROCEDURE STEP 1
1. Turn ignition switch OFF.
2. Keep pressing shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Release accelerator pedal. (Set the closed throttle position signal “ON”.)
5. Depress brake pedal. (Stop lamp switch signal “ON”.)
6. Turn ignition switch ON. (Do not start engine.)
7. Wait 3 seconds.
8. Move the selector lever from “D” to “3” position.
9. Release brake pedal. (Stop lamp switch signal “OFF”.)
10. Move the selector lever from “3” to “2” position.
11. Depress brake pedal. (Stop lamp switch signal “ON”.)
12. Depress accelerator pedal fully and release it.
>> GO TO 3.
3.
CHECK SELF-DIAGNOSIS CODE
Check A/T CHECK indicator lamp.
Refer to "Judgment Self-diagnosis Code".
If the system does not go into self-diagnostics. Refer to
,
>> DIAGNOSIS END
Judgment Self-diagnosis Code
If there is a malfunction, the lamp lights up for the time corresponding to the suspect circuit.
JPDIA0024GB
DIAGNOSIS SYSTEM (TCM)
TM-39
< FUNCTION DIAGNOSIS >
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Erase Self-diagnosis
• In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.
• However, this information is erased by turning ignition switch OFF after executing self-diagnostics or by
erasing the memory using the CONSULT-III.
No.
Malfunctioning item
No.
Malfunctioning item
1
Output speed sensor
12
Interlock
2
Direct clutch solenoid
13
1st engine braking
3
Torque converter
14
4
Line pressure solenoid
15
Accelerator pedal position sensor
5
Input clutch solenoid
16
Engine speed
6
Front brake solenoid
17
CAN communication line
7
18
1GR incorrect ratio
8
High and low reverse clutch solenoid
19
2GR incorrect ratio
9
Transmission range switch
20
3GR incorrect ratio
10
A/T fluid temperature sensor
21
4GR incorrect ratio
11
Input speed sensor
22
5GR incorrect ratio
TM-40
< COMPONENT DIAGNOSIS >
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
Description
INFOID:0000000005148528
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only.
On Board Diagnosis Logic
INFOID:0000000005148529
• This is an OBD-III self-diagnostic item.
• Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-III is detected when TCM cannot
communicate to other control units.
Possible Cause
INFOID:0000000005148530
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation Procedure
INFOID:0000000005148531
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-III.
3. Start engine and wait for at least 6 seconds.
4. If DTC is detected, go to
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis Procedure
INFOID:0000000005148532
1.
CHECK CAN COMMUNICATION CIRCUIT
With CONSULT-III
1. Turn ignition switch “ON” and start engine.
2. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-III.
Is any malfunction of the “U1000” indicated?
YES
>> Go to LAN section. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
NO
>> INSPECTION END
P0615 STARTER RELAY
TM-41
< COMPONENT DIAGNOSIS >
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P0615 STARTER RELAY
Description
INFOID:0000000005148533
TCM prohibits cranking other than at “P” or “N” position.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000005148534
On Board Diagnosis Logic
INFOID:0000000005148535
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0615 STARTER RELAY” with CONSULT-III is detected when starter relay is
switched “ON” other than at “P” or “N” position. (Or when switched “OFF” at “P” or “N” position).
Possible Cause
INFOID:0000000005148536
• Harness or connectors
(The starter relay and TCM circuit is open or shorted.)
• Sarter relay
DTC Confirmation Procedure
INFOID:0000000005148537
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Drive vehicle for at least 2 consecutive seconds.
5. If DTC is detected, go to
Diagnosis Procedure
INFOID:0000000005148538
1.
CHECK STARTER RELAY
With CONSULT-III
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “STARTER RELAY” ON/OFF.
Without CONSULT-III
Item name
Condition
Display value
STARTER RELAY
Selector lever in “N”,“P” position.
ON
Selector lever in other position.
OFF
Item name
Condition
Display value
STARTER RELAY
Selector lever in "N'', "P'' positions.
ON
Selector lever in other positions.
OFF
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