Test C: The Engine Cranks Slowly

PINPOINT TEST C: THE ENGINE CRANKS SLOWLY

C1-C2:

Normal Operation
In normal operation, voltage from the battery junction box (BJB) fuse 7 (60A) is supplied to the ignition switch through circuit 1050 (LG/VT). When the ignition switch is placed in the START position, voltage is supplied through circuit 33 (WH/PK) to the central junction box (CJB) fuse 33 (10A).

For 4R70E/4R75E transmission-equipped vehicles, voltage is supplied from the CJB fuse 33 (10A) to the digital transmission range (TR) sensor through circuit 1093 (TN/RD). In PARK or NEUTRAL, voltage is supplied from the TR sensor through circuit 32 (RD/LB) to the starter relay located in the BJB. The starter relay is supplied ground through circuit 57 (BK).

For Torq Shift transmission-equipped vehicles, voltage is supplied from the CJB to the starter relay through circuit 1093 (TN/RD). The starter relay is supplied ground from the PCM through circuit 1419 (LG/YE).

Voltage is supplied at all times to the stater motor from the battery, circuit 2037 (RD). The stater relay has voltage supplied at all times from battery junction box (BJB) fuse 18 (60A), circuit 1523 (DG). When the starter relay is energized, voltage supplied to the starter relay is sent to the starter motor solenoid through circuit 113 (YE/LB).

Possible Causes
- Loose or corroded connection, circuit 2037 (RD)
- Ground circuit
- Starter motor