This diagnostic criteria from the service manual for those that are interested.
Mike
CHECK ECM (1KD-FTV)
Disconnect the E5, E6, E7 and E8 ECM connectors.
Measure the voltage and resistance of the wire harness side connectors.
Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
BATT (E6-2) - E1 (E7-7)
L - BR
Battery
Always
10 to 14 V
IGSW (E5-9) - E1 (E7-7)
B-O - BR
IG power supply
Ignition switch ON
10 to 14 V
IGSW (E5-9) - E1 (E7-7)
B-O - BR
IG power supply
Ignition switch OFF
Below 1 V
E1 (E7-7) - Body ground
BR - Body ground
Ground
Always
Below 1 Ω
E2 (E8-28) - Body ground
BR - Body ground
Ground
Always
Below 1 Ω
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the E5, E6, E7 and E8 ECM connectors.
Measure the voltage of the connectors.
Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
STP (E6-15) - E1 (E7-7)
G-W - BR
Stop light switch input signal
Ignition switch ON, release brake pedal
Below 1 V
STP (E6-15) - E1 (E7-7)
G-W - BR
Stop light switch input signal
Ignition switch ON, depress brake pedal
10 to 14 V
ST1- (E6-14) - E1 (E7-7)
R-L - BR
Cruise cancel input signal
Ignition switch ON, depress brake pedal
Below 1 V
ST1- (E6-14) - E1 (E7-7)
R-L - BR
Cruise cancel input signal
Ignition switch ON, release brake pedal
10 to 14 V
CCS (E5-21) - E1 (E7-7)
G-W - BR
Cruise control main switch signal
Ignition switch ON
10 to 14 V
CCS (E5-21) - E1 (E7-7)
G-W - BR
Cruise control main switch signal
Set and hold main switch on CANCEL
6.6 to 10.1 V
CCS (E5-21) - E1 (E7-7)
G-W - BR
Cruise control main switch signal
Set and hold main switch on SET/COAST
4.5 to 7.1 V
CCS (E5-21) - E1 (E7-7)
G-W - BR
Cruise control main switch signal
Set and hold main switch on RES/ACC
2.3 to 4.0 V
CCS (E5-21) - E1 (E7-7)
G-W - BR
Cruise control main switch signal
Press and hold main switch ON-OFF button
Below 1 V
If the result is not as specified, the ECM may have a malfunction.