G240070T16 - G240070T24

D : DTC P1251

G240070t16 : CHECK THE THROTTLE MOTOR RELAY
1. Turn the ignition switch to the RUN position.

- Does the throttle motor relay make an audible click?

-> Yes
Goto [G240070t17]

-> No
Goto [G240070t22]

G240070t17 : CHECK THE ECM POWER SUPPLY FROM THE THROTTLE MOTOR RELAY
1. Measure the voltage between the throttle motor relay connector FH 32D pin 5 (NR) and ground.

- Is the voltage greater than 10 volts?

-> Yes
Goto [G240070t18]

-> No
Goto [G240070t19]

G240070t18 : CHECK CONTINUITY OF THE ECM POWER SUPPLY WIRE FROM THE THROTTLE MOTOR RELAY
1. Turn the ignition switch to the OFF position.
2. Disconnect the ECM electrical connector PI 1 and remove the throttle motor relay.
3. Measure the resistance between the throttle motor relay electrical connector FH 32D pin 5 (NR) and the ECM electrical connector PI 1 pin 134 (GU).

- Is the resistance less than 5 ohms?

-> Yes
DIAGNOSE the electronic engine control system.

-> No
REPAIR the ECM power supply wire from the throttle motor relay. CLEAR the DTC. TEST the system for normal operation.

G240070t19 : CHECK FUSE 18 IN THE FRONT POWER DISTRIBUTION BOX (FPDB)
1. Check the fuse.

- Is the fuse OK?

-> Yes
Goto [G240070t20]

-> No
Goto [G240070t21]

G240070t20 : CHECK THE THROTTLE MOTOR RELAY POWER SUPPLY CIRCUIT
1. Remove the throttle motor relay.
2. Measure the voltage between the throttle motor relay connector FH 32D pin 3 (YR) and ground.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the throttle motor relay power supply circuit. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new throttle motor relay. CLEAR the DTC. TEST the system for normal operation.

G240070t21 : CHECK FUSE 18 FOR A SHORT TO GROUND
1. Measure the resistance between fuse 18 and ground.

- Is the resistance greater than 10,000 ohms?

-> Yes
INSTALL a new fuse. CLEAR the DTC. TEST the system for normal operation.

-> No
REPAIR short to ground between engine compartment fuse box and the throttle motor relay. INSTALL a new fuse. CLEAR the DTC. TEST the system for normal operation.

G240070t22 : CHECK THE POWER SUPPLY CIRCUIT TO THE THROTTLE MOTOR RELAY COIL
1. Turn the ignition switch to the RUN position.
2. Measure the voltage between the throttle motor relay connector FH 32D pin 1 (GR) and ground.

- Is the voltage greater than 10 volts?

-> Yes
Goto [G240070t23]

-> No
REPAIR the throttle motor relay coil power supply circuit from the engine compartment fuse box. CLEAR the DTC. TEST the system for normal operation.

G240070t23 : CHECK CONTINUITY OF THE THROTTLE MOTOR RELAY COIL
1. Remove the throttle motor relay (if not already removed).
2. Measure the resistance between terminal 1 and terminal 2 of the throttle motor relay.

- Is the resistance between 70 and 90 ohms?

-> Yes
Goto [G240070t24]

-> No
INSTALL a new throttle motor relay. CLEAR the DTC. TEST the system for normal operation.

G240070t24 : CHECK CONTINUITY OF THE THROTTLE MOTOR RELAY GROUND CIRCUIT
1. Disconnect the ECM electrical connector PI 1.
2. Measure the resistance between the throttle motor relay electrical connector FH 32D pin 2 (GR) and the ECM electrical connector PI 1 pin 52 (GR).

- Is the resistance less than 5 ohms?

-> Yes
DIAGNOSE the electronic engine control system.

-> No
REPAIR the throttle motor relay ground circuit from the ECM to the engine compartment fuse box. CLEAR the DTC. TEST the system for normal operation.