1997 caravan code # p1698 3.3 engine. no aux input or output. need to know what code means and possible cause

Question

drove 135 miles shut car off went back in and problem started with dash gauges inop, check eng on, checked all fuses in engine compartment and under dash and they are good.put drb on and got code .

Answer 1

this is all what i have on this code

i would check for a short in the wiring and also check fuel pressure and check for spark

good luck

Jack

DTC P1698: NO BUS MESSAGE FROM TRANS CONTROL MODULE (3.3L & 3.8L)

Monitored & Set Conditions

The Powertrain Control Module (PCM) and Transmission Control Module (TCM) communicate messages across the bus, as information from either module is needed to operate their respective systems. Messages from TCM are monitored with ignition on and battery voltage more than 10 volts. DTC will be stored in PCM if no bus messages are received from TCM for 20 seconds. Possible causes for DTC to set are: intermittent condition, defective PCM, or defective connectors or wiring.

Testing

1.Turn ignition on. Using scan tool, clear DTCs. Cycle ignition on and off several times. Using scan tool, read DTCs. If Good Trip counter for DTC P1698 is displayed and displayed count is "0", go to next step. If Good Trip counter is not displayed for DTC P1698 or displayed count is not "0", go to step 3 . 2.Turn ignition on. Using scan tool, attempt to communicate with TCM. If scan tool communicates with TCM, replace PCM. Program the new PCM. See PROGRAMMING . If scan tool does not communicate with TCM, perform NO RESPONSE FROM TRANSMISSION CONTROL MODULE test. See COMMUNICATIONS under SYSTEM TESTS in BODY CONTROL MODULES- CARAVAN, TOWN & COUNTRY, & VOYAGER article in ACCESSORIES & EQUIPMENT. 3.At this time, conditions for DTC to set do not exist or fault is an intermittent problem. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Using scan tool, monitor parameters related to DTC while wiggling connectors and wiring harness. If value changes while wiggling connectors and wiring harness, repair connectors and wiring harness where wiggling caused value to change. If value does not change, review Freeze Frame data using scan tool. Attempt to duplicate condition that caused DTC to set. Check for any related technical service bulletins that may apply. Visually inspect related connectors and wiring harness. Repair connectors and wiring harness as necessary. See WIRING DIAGRAMS article. If no problems are indicated, test is complete.

Answer 2

Try at first disconnect the battery cable for a few minutes and see if comes back on, quickest way to find if you have other problem with the bus connection to TCM.

Need a new PCM or TCM... going to run you about $800

Code P1698 means

    *  P1698 PCM Failure EEPROM Write Denied

    * P1698 -No CCD messages from the Transmission or Body Control Module (TCM or BCM)