NO. 8 TACHOMETER INDICATION IS DEFECTIVE [INSTRUMENT CLUSTER]

id0903d5808100

8

Tachometer indication is defective

POSSIBLE CAUSE

•  PCM malfunction

•  Instrument cluster malfunction

•  Connector or pin malfunction

•  Short circuit in wiring harness between CAN-L, CAN-H and ground

•  Open circuit in CAN wiring harness (CAN-L, CAN-H)

•  CAN wiring harness (CAN-L, CAN-H) short each other

8	Tachometer indication is defective
POSSIBLE CAUSE	• PCM malfunction • Instrument cluster malfunction • Connector or pin malfunction • Short circuit in wiring harness between CAN-L, CAN-H and ground • Open circuit in CAN wiring harness (CAN-L, CAN-H) • CAN wiring harness (CAN-L, CAN-H) short each other

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Start the engine. ― Does the tachometer needle move smoothly? ― Does the tachometer needle indicate correct engine speed?	Yes	Troubleshooting completed.
1		No	Go to the next step.
2	• Inspect the DTC for the instrument cluster ON-BOARD DIAGNOSTIC SYSTEM. • Has DTC U2023 been recorded in memory?	Yes	Go to the next step.
2		No	Go to Step 4.
3	• Inspect the FREEZE FRAME DATA for DTC U2023. • Has the speedometer fail-safe function been requested?	Yes	Inspect the DTC for the PCM. (See ON-BOARD DIAGNOSTIC TEST [MZI-3.7].)
3		No	Go to the next step.
4	• Start the instrument cluster input/output check mode. • Inspect the tachometer using the check code 13. • Is the tachometer normal?	Yes	Inspect the PCM or connectors.
4		No	Replace the instrument cluster.
5	• Disconnect the negative battery cable. • Measure the resistance between the DLC-2 terminals F and E. • Is the resistance below 60 ohms?	Yes	Go to the next step.
5		No	Go to Step 7.
6	• Disconnect the negative battery cable. • Inspect the DLC-2 terminals F and E for short to power supply or ground. • Is there any malfunction?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
6		No	Replace the instrument cluster.
7	• Turn the ignition switch to the OFF position. • Inspect the instrument cluster connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion). • Are the terminals normal?	Yes	Go to the next step.
7		No	Repair or replace the terminal.
8	• Disconnect the negative battery cable. • Measure the resistance between the instrument cluster connector terminals 1W and 1X. • Is the resistance 114—126 ohms?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
8		No	Replace the instrument cluster.