Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
If DTC "C1A15" is displayed with DTC "U1000" or "C1A03", or "C1A04", first diagnose the DTC "U1000", "C1A03", or "C1A04".

Is applicable DTC detected?

YES

Perform diagnosis of applicable DTC.
- U1000: Refer to DTC Logic .
- C1A03: Refer to DTC Description .
- C1A04: Refer to DTC Description .
NO

GO TO 2.
CHECK VEHICLE SPEED SIGNAL
CONSULT

Check that "VHCL SPD SE" operates normally in "Data Monitor" mode of "LASER/RADAR".

CAUTION: Be careful of the vehicle speed.

Is the inspection result normal?

YES

GO TO 3

NO

GO TO 6
CHECK GEAR POSITION SIGNAL
CONSULT

Check that "GEAR" operates normally in "Data Monitor" mode of "TRANSMISSION".

Is the inspection result normal?

YES

GO TO 4

NO

GO TO 5
CHECK INPUT SPEED SENSOR SIGNAL
CONSULT

Check that "INPUT SPEED" operates normally in "Data Monitor" mode of "TRANSMISSION".

Is the inspection result normal?

YES

Replace the ADAS control unit. Refer to Removal and Installation .

NO

GO TO 5
CHECK TCM SELF DIAGNOSTIC RESULT
CONSULT
1. Select "Self Diagnostic Result" mode of "TRANSMISSION".
2. Check if any DTC is detected in "Self Diagnostic Result" mode of "TRANSMISSION".
Is any DTC detected?

YES

Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

NO

Replace the ADAS control unit. Refer to Removal and Installation .
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF DIAGNOSTIC RESULT
CONSULT
1. Select "Self Diagnostic Result" mode of "ABS".
2. Check if any DTC is detected in "Self Diagnostic Result" mode of "ABS".
Is any DTC detected?

YES

Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to DTC Index .

NO

Replace the distance sensor (ICC sensor). Refer to Removal and Installation