P1637

A : P1637: CAN NETWORK MALFUNCTION, TRANSMISSION CONTROL MODULE (TCM)

G354462t53 : CHECK TCM FOR DAMAGE
1. Inspect the TCM

- Does the TCM indicate any signs of damage?

-> Yes
INSTALL a new TCM. CLEAR the DTC, test the system for normal operation.

-> No

G354462t54 : CHECK CAN + FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between the diagnostic connector, pin 06, (Y) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t55 : CHECK CAN + FOR SHORT CIRCUIT TO BATTERY
1. Measure the resistance between the diagnostic connector, pins 06, (Y) and pin 16 (OY).

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t56 : CHECK CAN - FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between the diagnostic connector, pin 14 (G) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t57 : CHECK CAN - FOR SHORT CIRCUIT TO BATTERY
1. Measure the resistance between the diagnostic connector, pin 14 (G) and pin 16 (OY).

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t58 : CHECK FOR SHORT CIRCUIT BETWEEN CAN + AND CAN -
1. Measure the resistance between the diagnostic connector, pins 6 (Y) and 14 (G).

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t59 : CHECK FOR OPEN CIRCUIT ON CAN + BETWEEN DIAGNOSTIC CONNECTOR AND THE TCM
1. Disconnect the battery negative terminal.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t60 : CHECK FOR OPEN CIRCUIT ON CAN - BETWEEN THE DIAGNOSTIC CONNECTOR AND THE TCM
1. Measure the resistance between the diagnostic connector, pin 14 (G) and:

- Is the resistance less than 5 ohms?

-> Yes

-> No
REPAIR the CAN - circuit. CLEAR the DTC, test the system for normal operation.

G354462t61 : CHECK FOR CORRECT BUS TERMINATION
1. Reconnect the TCM connector, JB131 or JB230.
2. Measure the resistance between the diagnostic connector, pins 06 (Y) and 14 (G).

- Is the resistance between 50 and 70 ohms?

-> Yes
INSTALL a new TCM. CLEAR the DTC, test the system for normal operation.

-> No

G354462t62 : CHECK CONTINUITY OF THE CAN + CIRCUIT BETWEEN THE ECM AND THE IC
1. To test:

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the CAN + circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t63 : CHECK CONTINUITY OF THE CAN - CIRCUIT BETWEEN THE ECM AND THE IC
1. Measure the resistance between:

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the CAN - circuit. CLEAR the DTC, test the system for normal operation.

-> No

G354462t64 : CHECK FOR LOSS OF TERMINATION WITHIN THE ECM
1. To test:

- Is the resistance between 110 and 140 ohms?

-> Yes

-> No
Please check part is not on any form of prior authorization before replacement.

G354462t65 : CHECK FOR LOSS OF TERMINATION WITHIN THE IC
1. Measure the resistance between pins 17 and 18 of the IC.

- Is the resistance between 110 and 140 ohms?

-> Yes
POSSIBLE intermittent fault. Recheck DTCs.

-> No
INSTALL a new instrument cluster. CLEAR the DTC, test the system for normal operation.