Pinpoint Test A: THE ENGINE DOES NOT CRANK
Pinpoint Test A
A1
CHECK THE BATTERY
- Check the battery. For additional information, refer to «Charging System - General Information»(ref-311331) article.
Is the battery OK?
YES Go to step 2 . → A2
NO INSTALL a new battery. TEST the system for normal operation.
A2
CHECK THE STARTER RELAY
- Turn the ignition switch to the RUN position.
Does the starter relay make an audible click?
A3
CHECK THE STARTER FOR BATTERY VOLTAGE
- Measure the voltage between the starter connector ST8 (R) and ground.
Is the voltage greater than 10 volts?
YES Go to step 4 . → A4
NO Repair the starter motor permanent live supply circuit. TEST the system for normal operation.
A4
CHECK THE STARTER GROUND
- Measure the resistance between starter outer casing and ground.
Is the resistance less than 2 Ohm?
YES Go to step 5 . → A5
NO REPAIR starter ground cable or connections. TEST the system for normal operation
A5
CHECK THE STARTER SWITCH LIVE
- While ignition switch is in the RUN position measure the voltage between starter connector ST5 and ground.
Is the voltage greater than 10 volts?
YES INSTALL a new starter motor. TEST the system for normal operation.
NO Go to step 6 . → 6
A6
CHECK THE PERMANENT LIVE VOLTAGE TO STARTER RELAY
- Remove the starter relay. Measure the voltage between connector 30 and ground.
Is the voltage greater than 10 volts?
YES REPAIR starter switch live circuit from the starter relay to the starter. TEST the system for normal operation.
NO CHECK fuse 27 (30A) in the front PDB. If fuse OK REPAIR starter relay permanent live supply circuit. TEST the system for normal operation.
A7
CHECK FOR IGNITION VOLTAGE TO STARTER RELAY
- Remove the starter relay. Measure the voltage between connector 86 and ground.
Is the voltage greater than 10 volts?
A8
CHECK GROUND SUPPLY TO STARTER RELAY
- Measure the resistance between starter relay connector 85 and ground.
Is the resistance less than 5 ohms?
YES INSTALL a new starter relay.
NO Go to step 9 . → 9
A9
CHECK GROUND SUPPLY CIRCUIT
- Measure the resistance between starter relay connector 85 and ECM electrical connector PI1 pin 41 (GO)
Is the resistance less than 5 ohms?
YES DIAGNOSE the anti-theft system. For additional information, refer to «Anti-Theft - Active»(ref-311332) or «Anti-Theft - Passive»(ref-311333) article.
NO REPAIR the ground circuit between starter relay and ECM.
A10
CHECK FUSE 1 IN THE PRIMARY JUNCTION BOX
- Check the fuse.
Is the fuse OK?
A11
CHECK FOR SHORT TO GROUND
- Measure the resistance between starter relay connector 86 and ground.
Is the resistance greater than 10,000 ohms?
YES INSTALL a new fuse.
NO REPAIR short to ground between primary junction box and starter relay. TEST system for normal operation.
A12
CHECK FOR CONTINUITY BETWEEN PRIMARY JUNCTION FUSE BOX AND ECM
- Disconnect primary junction fuse box electrical connector FH53 and power train control module electrical connector PI1
- Check the resistance between FH53 pin 3 (Y) and PI1 pin 6 (Y).
Is the resistance less the 5 ohms?
YES Go to step 13 . → A13
NO REPAIR the circuit between the primary junction fuse box and the power train control module. TEST system for normal operation.
A13
CHECK FUSE 15 IN THE PRIMARY JUNCTION FUSE BOX
- Check the fuse
Is the fuse OK?
A14
CHECK FOR SHORT TO GROUND
- CAUTION: Many components on the vehicle are sensitive to electrostatic discharge. Use of an anti-static strap and mat is recommended.
- Disconnect the primary junction fuse box electrical connector CA2 and transmission control module (TCM) GB2.
- Measure the resistance primary junction fuse box electrical connector CA2 pin 1 (GO) and ground.
Is the resistance greater than 10,000 ohms?
YES INSTALL a new fuse.
NO REPAIR short to ground between primary junction fuse box and TCM. INSTALL a new fuse. TEST system for normal operation.
A15
CHECK FOR IGNITION VOLTAGE AT TCM
- Connect the primary junction fuse box electrical connector CA2
- Turn the ignition switch to the RUN position.
- Measure the voltage between TCM electrical connector GB2 pin 9 (GO) and ground
Is the voltage greater than 10 volts?
YES Go to step 16 . → A16
NO REPAIR the circuit between TCM and primary junction fuse box. TEST system for normal operation.
A16
CHECK FOR CONTINUITY BETWEEN TCM ELECTRICAL CONNECTOR GB2 AND ECM ELECTRICAL CONNECTOR PI1
- Check the resistance between GB2 pin 1O (GR) and PI1 pin 31 (GR).
Is the resistance less the 5 ohms?
YES INSTALL a new ECM. For additional information refer to Dealer Technical Support. TEST the system for normal operation. If fault is repeated INSTALL a new TCM.
NO REPAIR the circuit between TCM and primary junction fuse box. TEST system for normal operation.
Pinpoint Test B: THE ENGINE CRANKS SLOWLY
Pinpoint Test B
B1
CHECK FOR VOLTAGE DROP
- Measure the voltage between the starter motor permanent voltage supply terminal and the positive battery terminal with the ignition key in the START position.
Is the voltage greater than 10 volts?
YES Go to step 2 . → B2
NO CLEAN and TIGHTEN all positive battery cable connections. TEST the system for normal operation. If the concern persists, INSTALL a new positive battery cable.
B2
CHECK FOR GROUND CONNECTION
- Measure the voltage between the starter motor case and battery negative terminal with the ignition key in the START position.
Is the voltage less than 0.5 volts?
YES DIAGNOSE the battery and charging system. For additional information, refer to «Charging System - General Information»(ref-311331) article.
NO CLEAN and TIGHTEN all negative battery cable connections, starter motor mounting and body to engine ground strap. TEST the system for normal operation. If the concern persists, INSTALL a new negative battery cable.