Mazda 2002 6 Workshop Manual page 974

STEP INSPECTION
5 Close all doors. (Door switch off.)
DTC 08 TNS relay on/off signal
Diagnostic procedure
STEP INSPECTION
1 Turn headlight switch to TNS
position. (TNS relay on.)
2 Turn headlight switch off. (TNS relay
off.)
DTC 12 Operation signal to speedometer
INSPECTION
Wait for 2 seconds after selecting DTC 12.
WARNING AND INDICATOR SYSTEM
INDICATION
INDICATION
INDICATION
ACTION
Measure voltage at instrument cluster terminals 1I and
1J.
Is voltage B+?
• If as specified, replace instrument cluster.
• If not as specified, inspect following parts.
— Door switch
— Wiring harness (Instrument cluster—door switch)
Input signals to instrument cluster are okay.
ACTION
Go to next step.
Measure voltage at instrument cluster terminal 2K.
Is voltage B+?
• If as specified, replace instrument cluster.
• If not as specified, inspect following parts.
— TNS relay
— Wiring harness (Battery—TNS relay—instrument
cluster)
Measure voltage at instrument cluster terminal 2K.
Is voltage 0 V?
• If as specified, replace instrument cluster.
• If not as specified, inspect following parts.
— TNS relay
— Wiring harness (TNS relay—instrument cluster)
Input signal to instrument cluster is okay.
SITUATION
Speedometer needle
moves full scale then
returns to 60 km/h or 60
MPH.
Other than stated above.
—
ACTION
Speedometer is okay.
Replace instrument
cluster.
T–79
T