Nissan Maxima Service and Repair Manual: Power supply and ground circuit
Diagnosis Procedure
1.CHECK GROUND CONNECTION-I
- Turn ignition switch OFF.
- Check ground connection E9. Refer to Ground Inspection
2.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
- Disconnect ECM harness connector.
- Check the continuity between ECM harness connector and ground.
- Also check harness for short to power.

3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E11, F2
- Harness for open or short between ECM and ground
4.CHECK ECM POWER SUPPLY CIRCUIT-I

- Reconnect ECM harness connector.
- Turn ignition switch OFF and then ON.
- Check the voltage between ECM harness connectors.

5.DETECT MALFUNCTIONING PART
Check the following.
- IPDM E/R connector E18
- 10 A fuse (No. 35)
- Harness for open or short between ECM and fuse
6.CHECK ECM POWER SUPPLY CIRCUIT-II

- Turn ignition switch OFF and wait at least 10 seconds.
- Check the voltage between ECM harness connectors.

7.CHECK ECM POWER SUPPLY CIRCUIT-III

- Turn ignition switch ON.
- Check the voltage between IPDM E/R harness connector and
ground.

8.CHECK INTERMITTENT INCIDENT
9.CHECK ECM POWER SUPPLY CIRCUIT-IV

- Turn ignition switch OFF and wait at least 10 seconds.
- Check the voltage between ECM harness connectors.

10.CHECK ECM POWER SUPPLY CIRCUIT-V
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R
harness connector.
- Also check harness for short to ground and short to power.

11.CHECK 15 A FUSE
- Disconnect 15 A fuse (No. 42) from IPDM E/R.
- Check 15 A fuse.
12.CHECK ECM POWER SUPPLY CIRCUIT-VI
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R
harness connector.
- Also check harness for short to ground and short to power.

13.DETECT MALFUNCTIONING PART
Check the following.
- Junction block connectors E44, E45
- Harness for open or short between ECM and IPDM E/R
14.CHECK INTERMITTENT INCIDENT
Description
The specification (SP) value indicates the tolerance of the value that is
displayed in "SPEC" of "DATA MONITOR"
mode of CONSULT during normal operation of the Engine Control System. W ...
Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex
communication line with high data communication speed and excelle ...
Other materials:
Back-up lamp
Wiring Diagram
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Wiring diagram
AIR CONDITIONER CONTROL
Wiring Diagram - With Monochrome Display
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Squeak and rattle trouble diagnoses
Work Flow
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist
when the noise occurs. Use the Diagnostic Worksheet during the interview to
document the facts and conditions when the noise occurs and any customer's
comments; refer to RF-64, "Diagnost ...