Diagnostic Procedure

STEP	INSPECTION		ACTION
1	Retrieve the DTC of instrument cluster using M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER] .) Is the DTC detected?	Yes	Go to applicable DTC troubleshooting procedure. (See DTC TABLE [INSTRUMENT CLUSTER] .)
1		No	Go to the next step.
2	Cool down the engine. Switch the ignition ON. Verify that the high engine coolant temperature warning light (red) condition. Does the high engine coolant temperature warning light (red) illuminate or flash while 3-30 s after the engine switch is turned to ON position?	Yes	Go to the next step.
2		No	Go to Step 5.
3	Start the engine. Monitor PCM PID ECT using the M-MDS. Verify that the low engine coolant temperature indicator light (blue) condition when the ECT monitoring value above 55 °C {131°F} Does the low engine coolant temperature indicator light (blue) illuminate?	Yes	Go to Step 5.
3		No	Go to the next step.
4	Monitor the PCM PID ECT using the M-MDS. Is the PID ECT monitoring value for following value? Above 120 °C {248 °F} when high engine coolant temperature warning light (red) flashes. Above 125 °C {257 °F} when high engine coolant temperature warning light (red) illuminates.	Yes	Troubleshooting is completed. (The system is normal.)
4		No	Go to the next step.
5	Do the speedometer and tachometer indicate correct?	Yes	Go to the next step.
5	Do the speedometer and tachometer indicate correct?	No	Go to Step 7.
6	Turn on and off both low engine coolant temperature indicator light (blue)/high engine coolant temperature warning light (red) using M-MDS instrument cluster active command modes. (See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER] .) Do the both low engine coolant temperature indicator light (blue)/high engine coolant temperature warning light (red) turn on and off according to active command modes?	Yes	Inspect the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZR 2.5] .)
6		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
7	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.
7		No	Go to Step 9.
8	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.
8		No	Replace the instrument cluster.
9	Switch the ignition OFF (LOCK). 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.
9		No	Repair or replace the terminal.
10	Disconnect the negative battery cable. Measure the resistance between the instrument cluster connector terminals 2B and 2D. Is the resistance 114-126 ohms ?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
10		No	Replace the instrument cluster.