INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE

2008 - MX-5 - Body and Accessories

INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE

NOTE:

In this mode, it is possible to verify the items in the following chart.

Check Code Table


Check code	Check item	Related items
01	SAS control module	Seat belt warning alarm
04	Door switch	Lights-on reminder warning alarm Key reminder warning alarm
08	TNS relay	Lights-on reminder warning alarm Each illumination light
12	Speedometer	Speedometer
13	Tachometer	Tachometer
14	Buzzer	Buzzer
16	Fuel-level warning light	Fuel-level warning light
18	Ignition key illumination	Ignition key illumination
22	Fuel gauge sender unit	Fuel gauge
23	Fuel gauge	Fuel gauge
25	Water temperature gauge	Water temperature gauge
26	Odometer/tripmeter (LCD) Warning and indicator light	Odometer/tripmeter (LCD) Warning and indicator light
28	Oil pressure gauge	Oil pressure gauge
31	Key reminder switch	Key reminder warning alarm
57	Panel light control	Illumination light bulb
59	CAN system Fuel gauge sender unit	CAN system Fuel system

NOTE:

Check codes which are not listed may be indicated, but they cannot be inspected.

The check codes are displayed in numerical order. (While performing the inspection, if you want to inspect a check code with a number smaller than the code number you are currently inspecting, terminate the check mode then repeat the inspection from the beginning.)

If a speed signal is input to the instrument cluster (the wheels are rotated), the input/output check mode will be cancelled.

The check codes can be fast-forwarded by pushing and holding the odometer/tripmeter switch for 1 s or more.

Checking Order

NOTE:

When inspecting more than two check codes, begin with the code with the highest ranking.


Priority order of inspection	Ignition switch position	Check code
1	ON	22
2	ON	01, 04, 08, 12, 13, 14, 16, 18, 23, 25, 26, 28, 57, 59
3	LOCK	31

Check Code Inspection

Check code 01


Check code 01		Buckle switch and passenger sensing system
STEP	INSPECTION CONDITION		DISPLAY	ACTION
1	Unfasten driver-side seat belt. (Buckle switch ON)			Go to the next step.
				Inspect the following parts: Buckle switch (driver-side) SAS control module Wiring harness (Buckle switch (driver-side)—SAS control module)
				Using the DTC and PID of SAS control module, inspect the SAS control module, buckle switch and the related wiring harnesses. If there is no malfunction, inspect for continuity between SAS control module terminal 1X and instrument cluster terminal 2A (wiring harness-side). If there is continuity, replace the instrument cluster.
2	Fasten driver-side seat belt. (Buckle switch OFF)			Go to the next step.
				Inspect the following parts: Buckle switch (driver-side) SAS control module Wiring harness (Buckle switch (driver-side)—SAS control module)
				Using the DTC and PID of SAS control module, inspect the SAS control module, buckle switch and the related wiring harnesses. If there is no malfunction, inspect for continuity between SAS control module terminal 1X and instrument cluster terminal 2A (wiring harness-side). If there is continuity, replace the instrument cluster.
3	Seat one person in the passenger’s seat, and unfasten passenger-side seat belt. (Seat weight sensor and buckle switch ON)			Go to the next step.
				Inspect the following parts: Buckle switch (passenger-side) Seat weight sensor control module Seat weight sensor SAS control module Wiring harness (Buckle switch (passenger-side)—SAS control module, seat weight sensor—Seat weight sensor control module—SAS control module)
				Using the DTC and PID of SAS control module, inspect the SAS control module, buckle switch (driver-side, passenger-side), seat weight sensor control module, seat weight sensor and related wiring harnesses. If there is no malfunction, inspect for the continuity between SAS control module terminal 1X and instrument cluster terminal 2A (wiring harness-side). If there is a continuity, replace the instrument cluster.


4	Seat one person in the passenger’s seat, and fasten passenger-side seat belt. (Seat weight sensor ON and buckle switch OFF) Seat no person in the passenger’s seat, and unfasten passenger-side seat belt. (Seat weight sensor OFF and buckle switch ON) Seat no person in the passenger’s seat, and fasten passenger-side seat belt. (Seat weight sensor and buckle switch OFF)			Input signal to the instrument cluster is normal.
				Inspect the following parts: Buckle switch (passenger-side) Seat weight sensor control module Seat weight sensor SAS control module Wiring harness (Buckle switch (passenger-side)—SAS control module, seat weight sensor—Seat weight sensor control module—SAS control module)
				Using the DTC and PID of SAS control module, inspect the SAS control module, buckle switch (driver-side, passenger-side), seat weight sensor control module, seat weight sensor and the related wiring harnesses. If there is no malfunction, inspect for continuity between SAS control module terminal 1X and instrument cluster terminal 2A (wiring harness-side). If there is continuity, replace the instrument cluster.

Check code 04


Check code 04		Door switch ON/OFF signal
STEP	INSPECTION CONDITION		DISPLAY	ACTION
1	Open the driver-side door. (The door switch is on.)			Close the driver-side door, then go to the next step.
1	Open the driver-side door. (The door switch is on.)			Verify that the voltage of instrument cluster terminal 2E is 1.0 V or less. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: Door switch Wiring harness (Instrument cluster—door switch)
2	Close all doors.(Door switches are off.)			Verify that the voltage of instrument cluster terminal 2E is B+. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: Door switch Wiring harness (Instrument cluster—door switch)
2	Close all doors.(Door switches are off.)			Input signal to the instrument cluster is normal.

Check code 08


Check code 08		TNS relay ON/OFF signal
STEP	INSPECTION CONDITION		DISPLAY	ACTION
1	Turn the headlight switch to the TNS position. (TNS relay ON)			Go to the next step.
1				Verify that the voltage of instrument cluster terminal 1B is B+. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: TNS relay Wiring harness (Battery—TNS relay—instrument cluster)
2	Turn the headlight switch off. (TNS relay OFF)			Verify that the voltage of the instrument cluster terminal 1B is 1.0 V or less. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: TNS relay Wiring harness (TNS relay—instrument cluster)
2	Turn the headlight switch off. (TNS relay OFF)			Input signal to the instrument cluster is normal.

Check code 12


Check code 12	Speedometer display signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 12, wait for approx. 2 s.			The speedometer needle moves full scale then returns to approx. 60 km/h or approx. 60mph.	The speedometer is normal.
			Except above	Replace the instrument cluster.
			—	Replace the instrument cluster.

Check code 13


Check code 13	Tachometer operation signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 13, wait for approx. 2 s.			The tachometer needle moves full scale then returns to approx. 3,000 rpm.	The tachometer is normal.
			Except above	Replace the instrument cluster.
			—	Replace the instrument cluster.

Check code 14


Check code 14	Buzzer operation signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 14, wait approx. 2 s.			The buzzer sounds.	The buzzer is normal.
After selecting check code 14, wait approx. 2 s.			The buzzer does not sound.	Replace the instrument cluster.

Check code 16


Check code 16	Fuel-level warning light flashing signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 16, wait approx. 2 s.			Fuel-level warning light flashes three times.	The fuel-level warning light is normal.
After selecting check code 16, wait approx. 2 s.			Except above	Replace the instrument cluster.

Check code 18


Check code 18	Ignition key illumination control signal
INSPECTION CONDITION	DISPLAY	ACTION
After selecting check code 18, wait approx. 2 s.		Ignition key illumination flashes three times.	The ignition key illumination is normal.
After selecting check code 18, wait approx. 2 s.		Except above	Verify that the voltage of instrument cluster terminal 1K is B+. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: Ignition key illumination bulb Wiring harness (Battery—ignition key illumination—instrument cluster)

Check code 22


Check code 22		Fuel level signal
STEP	INSPECTION CONDITION		DISPLAY	ACTION
1	Select check code 22 with the fuel gauge sender unit connector disconnected.			Go to the next step.
1			Except above	Go to the Step 6.
2	Connect terminals 2R and 2T of the instrument cluster.			Go to the next step.
2	Connect terminals 2R and 2T of the instrument cluster.		Except above	Go to the Step 6.
3	Using the SST (Fuel and thermometer checker) or resistor, input 20 ohms between instrument cluster terminals 2R and 2T.			Go to the next step.
3			Except above	Go to the Step 6.
4	Using the SST (Fuel and thermometer checker) or resistor, input 60 ohms between instrument cluster terminals 2R and 2T.			Go to the next step.
4			Except above	Go to the Step 6.
5	Using the SST (Fuel and thermometer checker) or resistor, input 100 ohms between instrument cluster terminals 2R and 2T.			Inspect the fuel gauge sender unit.
5			Except above	Go to the next step.
6	Inspect the wiring harness and connector between instrument cluster and fuel gauge sender unit. If there is any malfunction, repair or replace the wiring harness or connector. If there is no malfunction, replace the instrument cluster.

Check code 23


Check code 23	Fuel gauge operation signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 23, wait approx. 2 s.			The fuel gauge indicates status in the following order approx. every 2 s. F → 1/2 → E → F (fixed)	The fuel gauge is normal.
			Except above	Replace the instrument cluster.
			Replace the instrument cluster.

Check code 25


Check code 25	Water temperature gauge operation signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 25, wait approx. 2 s.			The water temperature gauge indicates status in the following order approx. every 2 s. H → Center → C → H (fixed)	The water temperature gauge is normal.
			Except above	Replace the instrument cluster.
			Replace the instrument cluster.

Check code 26


Check code 26	Odometer/tripmeter display signal
INSPECTION CONDITION		DISPLAY	ACTION
Select check code 26.			Display is normal. Warning and indicator light illuminated. Generator warning light AT warning light DSC indicator light DSC OFF light ABS warning light Brake system warning light Selector indicator light MIL Cruise set indicator light Cruise main indicator light Security light Keyless warning light Keyless indicator light	The odometer/tripmeter is normal. Warning and indicator is normal.
Select check code 26.			Except above	Replace the instrument cluster.

Check code 28


Check code 28	Oil pressure gauge operation signal
INSPECTION CONDITION		DISPLAY	ACTION
After selecting check code 28, wait approx. 2 s.			The oil pressure gauge indicates status in the following order approx. every 2 s. H → Center → L → H (fixed)	The oil pressure gauge is normal.
			Except above	Replace the instrument cluster.
			Replace the instrument cluster.


Check code 31		Key reminder switch ON/OFF signal
STEP	INSPECTION CONDITION		DISPLAY	ACTION
1	Remove the key from the steering lock, then reinsert the key into the steering lock after selecting check code 31. (The key reminder switch is on.)			Go to the next step.
1				Verify that the voltage of instrument cluster terminal 2C is B+. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: Key reminder switch Wiring harness (Battery—key reminder switch—instrument cluster)
2	Remove the key from the steering lock. (The key reminder switch is off.)			Verify that the voltage of instrument cluster terminal 2C is 1.0 V or less. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: Key reminder switch Wiring harness (Key reminder switch—instrument cluster)
2				Input signal to the instrument cluster is normal.

Check code 57


Check code 57	Panel light control signal
INSPECTION CONDITION	DISPLAY	ACTION
Turn the headlight switch to the TNS position. After selecting check code 57, wait approx. 2 s.		Illumination light (hazard warning switch, center panel module, etc.) flashes three times.	The panel light control signal is normal.
		Except above	Verify that the voltage of instrument cluster terminal 1F is B+. If the voltage is as specified, replace the instrument cluster. If the voltage is not as specified, inspect the following parts: Illumination light (hazard warning switch, center panel module, etc.) Wiring harness (Instrument cluster—illumination lights—TNS relay)

Check code 59

Diagnostic procedure


Check code 59		CAN system/fuel system
STEP	INSPECTION		INDICATION	ACTION
1	The three digits number is indicated after selecting check code 59. Confirm the first digit from the right.			The CAN system is normal. Go to next step.
1				The DTC of CAN system is detected. Perform the DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM]) If the CAN system is normal, replace the instrument cluster. Go to next step.
2	Confirm the second digit from the right.			The wiring harnesses between the fuel gauge sender unit and instrument cluster are normal. Go to next step.
2	Confirm the second digit from the right.			Inspect following parts. Fuel gauge sender unit Wiring harness (Fuel gauge sender unit—instrument cluster) If fuel gauge sender unit and wiring harness are normal, replace the instrument cluster. Go to next step.
3	Confirm the third digit from the right.			The fuel pulse signal from the PCM is normal.
3	Confirm the third digit from the right.			Inspect the PCM. (See DTC TABLE [LF], PCM INSPECTION [LF]) If the PCM is normal, replace the instrument cluster.

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