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Autopapyrus · Nissan Patrol TB45E (Y61, 2000)
https://autopapyrus.com/guides/nissan/patrol/engine-management-system-diagnostics/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Nissan Patrol TB45E (Y61, 2000): Engine Management System Diagnostics

The TB45E is equipped with an electronically controlled fuel injection system. The 2000 model year engine uses a 14-pin Consult connector (Nissan Consult-I) for diagnostics, a proprietary protocol that predates OBD-II. The diagnostic procedure includes two methods: reading codes manually from the flashing Check Engine light (basic diagnostics), or connecting a Consult scan tool for extended data.

Difficulty: Medium Time: 30-60 minutes Steps: 10 Tools: jumper wire (paper clip or a piece of wire) or a Consult/OBD-II diagnostic scan tool, notepad for recording codes

Part

  • 🔩 not required (diagnostic procedure)

Step by step

10 steps
  1. Locate the diagnostic connector. It is a white 14-pin block under the instrument panel to the left of the steering column, near the fuse box or above the clutch pedal.
  2. Turn the ignition to the ON position (do NOT start the engine). Make sure the Check Engine light on the instrument cluster stays on continuously. This indicates the system is ready.
  3. Use a jumper (paper clip or piece of wire) to connect terminals 1 and 8 of the connector (lower left and lower right). The Check Engine light should go out within 1 second.
  4. Hold the jumper in place for at least 2 seconds, then remove it. The system will enter self-diagnosis mode, and the light will begin flashing out the trouble codes.
  5. Read the codes from the flashes. Each code consists of two groups of flashes, with a 2.1-second pause between codes. Long flashes (0.6 sec) are tens, and short flashes (0.3 sec) are ones. Example: code 12 = one long flash, a 0.9-second pause, then two short flashes. Code 0505 means no faults were found.
  6. Write down all the codes. Typical TB45E codes: 11 – crankshaft position sensor, 12 – mass air flow (MAF) sensor, 13 – engine coolant temperature sensor, 14 – vehicle speed sensor. For the full list of codes, see the manufacturer's service manual (codes in the 10-55 series).
  7. To clear the trouble codes after a repair: while the light is flashing (self-diagnosis mode), connect terminals 1 and 8 with the jumper again for 2 seconds, then remove it. The codes will be erased from the ECU memory.
  8. Alternative (if a scan tool is available): connect a Nissan Consult tool or a universal OBD-II scan tool that supports Consult-I to the connector. In the menu, select "Nissan," then "Patrol," then "TB45E." Functions: reading codes, clearing codes, real-time data streams (engine speed, temperature, sensor voltages), and ECU parameters.
  9. After reading the codes, check the corresponding sensors and circuits. Codes 11-14 indicate an open or short circuit in the wiring or a fault in the sensor itself. Check the connectors for corrosion, check the wires for continuity, and measure sensor resistance with a multimeter.
  10. If the Check Engine light does not respond when the terminals are connected, check the ECU circuit fuse (under-hood fuse box, 15 A), the diagnostic connector terminals, and the ECU ground on the engine block.

Common mistakes and warnings

  • Do not jumper arbitrary terminals of the connector, only 1 and 8. Shorting other pairs can damage the ECU. If the codes point to multiple misfires or an oxygen sensor fault (codes 21-22), do not drive the vehicle for an extended period, because this will cause the catalytic converter to overheat. Diagnosing secondary systems (automatic transmission, ABS, airbags) requires a professional Consult-II or Consult-III scan tool.