Speed Signal Circuit [10/2023 - ]: Procedure

1. Disconnect the G209 combination meter assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G209-8 (+S) - Body ground	Engine switch on (IG)	4.5 to 14 V

   HINT: 

   If any of the ECUs specified in the wiring diagram supplies power to the combination meter assembly, the combination meter assembly will output a waveform.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  4

Result: 

OK 

See step  2

HINT: 

This procedure is performed to check the diode inside the combination meter assembly.

1. Remove the combination meter assembly.

   Refer to REMOVAL [10/2023 - ]

2. Measure the internal resistance of the combination meter assembly.

   Standard Resistance

   Tester Connection	Tester Connection	Condition	Measured Value
   G209-6 (IG+) - G209-25 (SI)	Positive (+) tester probe → G209-6 (IG+) Negative (-) tester probe → G209-25 (SI)	Always	A
   G209-6 (IG+) - G209-25 (SI)	Positive (+) tester probe → G209-25 (SI) Negative (-) tester probe → G209-6 (IG+)	Always	B

   OK

   There is a large difference between the measured value (A) and the measured value (B).

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

Result: 

OK 

See step  3

1. Disconnect the G209 combination meter assembly connector.
2. Disconnect the G212 certification ECU (smart key ECU assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G209-25 (SI) - G212-28 (SPDO)	Always	Below 1 Ω
   G209-25 (SI) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the G209 combination meter assembly connector.
2. Disconnect the L52 stereo component amplifier assembly connector.
3. Disconnect the A95 ECM connector.
4. Disconnect the G52 radio receiver assembly connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G209-8 (+S) - Other terminals and body ground	Always	10 kΩ or higher
   G209-8 (+S) - L52-17 (SPD) or A95-24 (SPD) or G52-8 (SPD)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the G209 combination meter assembly connector.
2. Disconnect the A95 ECM connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G209-8 (+S) - Body ground	Engine switch on (IG)	4.5 to 14 V

   HINT: 

   If the result is as specified, there may be a short circuit in the ECM.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

See step  6

1. Disconnect the G209 combination meter assembly connector.
2. Disconnect the G52 radio receiver assembly connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G290-8 (+S) - Body ground	Engine switch on (IG)	4.5 to 14 V

   HINT: 

   If the result is as specified, there may be a short circuit in the radio receiver assembly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to  REMOVAL [10/2023 - ]