P1606

P : DTC P1606. ECM RELAY.

G92429t96 : CHECK THE ECM CONTROL RELAY
1. Turn the ignition switch to the ON position.

- Does the ECM relay make an audible click?

-> Yes

-> No

G92429t97 : CHECK FOR POWER SUPPLY FROM THE ECM CONTROL RELAY
1. Measure the voltage between the ECM control relay JB34 pin 131 and GROUND.

- Is the voltage less than 10 volts?

-> Yes

-> No
REPAIR the circuit from the ECM control relay to the ECM. CLEAR the DTC. TEST the system for normal operation.

G92429t98 : CHECK FUSE 9 IN THE ENGINE COMPARTMENT FUSE BOX
1. Check the fuse.

- Is the fuse OK?

-> Yes

-> No
INSTALL a new fuse. Check the circuit for cause of fuse failure. CLEAR the DTC. TEST the system for normal operation.

G92429t99 : CHECK THE POWER SUPPLY TO FUSE 9 IN THE ENGINE COMPARTMENT FUSE BOX
1. Measure the voltage between Fuse 9 electrical connector JB34 pin 75 and GROUND.

- Is the voltage less than 10 volts?

-> Yes
Repair the circuit from the battery positive to the engine compartment fuse box. CLEAR the DTC. TEST the system for normal operation.

-> No

G92429t100 : CHECK THE POWER SUPPLY FROM FUSE 9 IN THE ENGINE COMPARTMENT FUSE BOX TO THE ECM CONTROL RELAY
1. Measure the voltage between the ECM control relay electrical connector JB34 pin 132 and GROUND.

- Is the voltage less than 10 volts?

-> Yes
Repair the circuit from the engine compartment fuse box to the ECM control relay. CLEAR the DTC. TEST the system for normal operation.

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

G92429t101 : CHECK FUSE 31 OF THE ENGINE COMPARTMENT FUSE BOX
1. Check the fuse.

- Is the fuse OK?

-> Yes

-> No

G92429t102 : CHECK POWER SUPPLY TO THE ECM CONTROL RELAY FROM FUSE 31 OF THE ENGINE COMPARTMENT FUSE BOX
1. Measure the voltage between ECM relay electrical connector JB34 pin 133 and GROUND.

- Is the voltage less than 10 volts?

-> Yes

-> No

G92429t103 : CHECK CONTINUITY OF THE ECM CONTROL RELAY GROUND CIRCUIT
1. Disconnect the ECM electrical connector EN16.
2. Remove the ECM control relay from the engine compartment fuse box.
3. Measure the resistance between the ECM electrical connector EN16 pin 40 and JB34 pin 134 of the engine compartment fuse box.

- Is the resistance less than 5 ohms?

-> Yes

-> No
REPAIR the circuit. CLEAR the DTC. TEST the system for normal operation.
This circuit includes the power distribution fuse box and the EMS relay and diode

G92429t104 : CHECK CONTINUITY OF THE ECM CONTROL RELAY WINDING
1. Measure the resistance of the ECM control relay winding between pins 1 and 2 of the ECM control relay.

- Is the resistance less than 60 ohms?

-> Yes
INSTALL a new ECM control relay. CLEAR the DTC. TEST the system for normal operation.

-> No
INSTALL a new ECM. Before replacing an ECM, contact dealer technical support. CLEAR the DTC. TEST the system for normal operation.

G92429t105 : CHECK FUSE 31 OF THE ENGINE COMPARTMENT FUSE BOX FORA SHORT TO GROUND
1. Measure the resistance between electrical connector JB34 pin 83 of the engine 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 ECM control relay. CLEAR the DTC. TEST the system for normal operation.

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

G92429t179 : CHECK FUSE 9 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND
1. Measure the resistance between electrical connector JB34 pin 132 of the engine 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 ECM control relay. CLEAR the DTC. TEST the system for normal operation.

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

G92429t107 : CHECK THE ECM CONTROL RELAY DIODE
1. Remove the ECM control relay diode from the engine compartment fuse box.
2. Measure the continuity of ECM control relay diode.

- Is the resistance less than 5 ohms?

-> Yes
Possible intermittent fault. Recheck DTCs.

-> No
INSTALL a new ECM control relay diode. Make sure that the ECM control relay diode is installed correctly. CLEAR the DTC. TEST the system for normal operation.