P1251

DTC P1251

G92527t16: CHECK THE THROTTLE MOTOR RELAY
1. Turn the ignition switch to the RUN position.

- Does the throttle relay make an audible click?

-> Yes
GO to Pinpoint Test G92527t17.

-> No
GO to Pinpoint Test G92527t23.

G92527t17: CHECK THE ECM POWER SUPPLY FROM THE THROTTLE MOTOR RELAY
1. Measure the voltage between the throttle motor relay connector JB34-138 and ground.

- Is the voltage greater than 10 volts?

-> Yes
GO to Pinpoint Test G92527t18.

-> No
GO to Pinpoint Test G92527t19.

G92527t18: 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 EN16 and remove the throttle motor relay.
3. Measure the resistance between the throttle motor relay electrical connector JB34-138 and the ECM electrical connector EN16-134.

- 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.

G92527t19: CHECK FUSE 33 IN THE ENGINE COMPARTMENT FUSE BOX.
1. Check the fuse.

- Is the fuse OK?

-> Yes
GO to Pinpoint Test G92527t20.

-> No
GO to Pinpoint Test G92527t21.

G92527t20: CHECK THE THROTTLE MOTOR RELAY POWER SUPPLY CIRCUIT
1. Remove the throttle motor relay.
2. Measure the voltage between the throttle motor relay connector JB34-139 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.

G92527t21: CHECK FUSE 33 FOR A SHORT TO GROUND
1. Measure the resistance between fuse 33 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.

G92527t22: CHECK FUSE 36 IN THE ENGINE COMPARTMENT FUSE BOX
1. Check the fuse.

- Is the fuse OK?

-> Yes
GO to Pinpoint Test G92527t22.

-> No
GO to Pinpoint Test G92527t25.

G92527t23: 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 JB34-137 and ground.

- Is the voltage greater than 10 volts?

-> Yes
GO to Pinpoint Test G92527t26.

-> No
GO to Pinpoint Test G92527t24.

G92527t24: CHECK CONTINUITY OF THE POWER SUPPLY CIRCUIT TO THE THROTTLE MOTOR RELAY COIL
1. Disconnect the ECM electrical connector EN16 and remove the throttle motor relay.
2. Measure the resistance between the throttle motor relay electrical connector JB34-137 and the ECM electrical connector EN16-52.

- Is the resistance less than 5 ohms?

-> Yes
GO to Pinpoint Test G92527t26.

-> 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.

G92527t25: CHECK FUSE 36 OF THE PASSENGER COMPARTMENT FUSE BOX FOR A SHORT TO GROUND
1. Measure the resistance between fuse 36 of the passenger compartment fuse box and ground.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR short to ground between the engine compartment fuse box and the throttle motor relay coil. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new fuse. CLEAR the DTC. TEST the system for normal operation.

G92527t26: 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
GO to Pinpoint Test G92527t27.

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

G92527t27: CHECK CONTINUITY OF THE THROTTLE MOTOR RELAY GROUND CIRCUIT
1. Disconnect the ECM electrical connector EN16.
2. Measure the resistance between the throttle motor relay electrical connector JB34-135 and the ECM electrical connector EN16-52.

- 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.